Table of Content

28 June 2022, Volume 43 Issue S1

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Contents

2022, 43(S1):  0. 

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Paper

Overall Design of Armored Vehicles Based on System Engineering

DU Zhiqi， TANG Jing

2022, 43(S1):  1-10.  doi:10.12382/bgxb.2022.A016

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In order to refine the specifications and processes on the overall design of armored vehicles，the main concepts concerned on the system architecture of armored vehicles，such as the vehicle architecture of five object levels，six design categories，four-layers Work-Breakdown criteria and assemblies trade-off methods，are proposed based on the design theories in Refs. \[9-12\].The V-mode workflow and the conceptual design process from needs to solutions are defined，and the concept of set-based design(SBD) is introduced into the overall design of armored vehicles.The polices of intergraded portfolio development management are summarized.

MBSE-based Requirement Analysis of Transmission System

CHEN Juan， ZHOU Guangming， LI Xintong， ZOU Tiangang， HOU Wei， SUN Xueyan

2022, 43(S1):  11-20.  doi:10.12382/bgxb.2022.A007

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As one of the core systems of modern special vehicles，the transmission system is a complex system engineering and has a key influence on the vehicle mobility performance. Accurate and complete design requirements are helpful to control the design risks，and reduce the development cycle and cost，etc.The model-based systems engineering method is applied to the requirement analysis process of transmission system，and a method characterized by development stages and structure levels is proposed. Based on vehicle operating scenarios，the proposed method is used to capture the requirements of the transmission system and its components related to the vehicle performancefrom top to bottom，and defines the decomposition and traceability relationship among the requirements of the vehicle，the transmission system and its components. With system modeling language and related tools，this method is used to analyze the indicator-kind requirement of a special vehicle， and obtain the requirement indicators and the cross-linking relationships of different system levels in the whole stage of research and development The result shows that the ptoposed method can well build a set of requirement indicators of the transmission system，thus providing a direction for the performance matching and optimization analysis of the vehicle.

Integrated Structure of Communication Equipment for Military Vehicle

ZHAO Jidong， GAI Zhenwei， LI Jing， YANG Zhilai， WANG Wei

2022, 43(S1):  21-25.  doi:10.12382/bgxb.2022.A002

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With the development of electronic integration technology，the method of integrating communication equipment for military vehicles has different features in different periods. More communication channels，broad frequency band and higher-speed signal transmission are the development requirements of communication equipment for military vehicle.An architecture for integrating communication equipment and the vehicle electronic integration system is presented，which includes universal baseband processing unit，digital switching unit and wideband power amplifier unit.And an integration design method and a basic integration system structure are proposed，and the function and feature of subsystem structure and the relationship between them are described. With much more application of the integration system system structure in military vehicle, the integration level of the electron.

Dynamic Modeling and Simulation of Airborne Vehicle's Landing Buffer Process

YANG Zhanhua， LIU Chunsheng， LI Jun， GUO Shaopeng， LI Jianyang

2022, 43(S1):  26-34.  doi:10.12382/bgxb.2022.A021

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For the problems of high cost，long period and high risk of airdrop test of airborne vehicles，a simulation model of vehicles and cushion airbags was established in the design phase of an airborne vehicle. A simplified vehicle model，an airbag modeland a rigid-flexible coupling model of vehicle and airbag are established using the finite element analysis method，and the landing buffer processes of vehicle airdrop under normal and extreme conditions are simulated and calculated. The vehicle attitude changes during free fall， airbag cushion and rebound from airbag， the impact acceleration characteristics of bottom deck， top deck and turret of vehicle body， and the maximum stress position and maximum value of vehicle body structure under the two working conditions were obtained. The results show that the top deck of vehicle body has the largest impact acceleration，with an average peak value of 11.31 g under normal condition，and the maximum stress meets the design requirements；under extreme condition，the maximum peak impact load appears at the power plant support，and the maximum stress exceeds the design allowable value，for which a partial structural improvement design is required. The research results can provide the quantified load boundary conditions for vehicle structural optimization design，the calculation data for landing buffer process test and test programs，and the theoretical basis for the matching optimization，testing，and improvement of vehicle body and airbag.

The Radial Stiffness Calculation and Parameter Optimization of the Annular Rubber Shock Absorber Based on Mooney-RivlinModel

WANG Lei， LI Yi， MA Zhihui

2022, 43(S1):  35-45.  doi:10.12382/bgxb.2022.A008

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The annular rubber shock absorber is a supporting component for the vehicle.High performance and long mechanical life of transmission equipment rely on the radial stiffness of shock absorber.The damping effect is related to the physicochemical property of rubber and the mechanical structure of shock absorber.Based on the Mooney-Rivlin model，the operating process of shock absorber under the radial load is simulated on ANSYS-Workbench，and the radial stiffnesses of shock absorbers with two different kinds of rubbers under several temperature conditions are compared.The geometric parameters of shock absorber under the Stress intensity of rubber are optimized to get the largest radial stiffness.These works not only improve the reliability of the transmission equipment，but also provide a method and reference for studying the rubber shock absorbers.

Vehicle Human-Computer Interaction Display and Control Technology Based on Wayland Graphics Protocol and Fibre ChannelNetwork

WANG Xinqiang， WANG Bo， JIA Wei， XIAN Yi， YANG Zongrui， HAN Jingye

2022, 43(S1):  46-53.  doi:10.12382/bgxb.2022.A010

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A vehicle human-computer interaction display and control technology based on Wayland graphics protocol and fibre channel network is designed to improve the human-computer interaction experience of vehicles and realize the networked human-computer interaction. The localized hardware platform is used to adapt to localized operating system，and a vehicle fibre channel network is built based on fibre channel protocol. Taking the graphic window as a basic unit，any networked display between multiple on-board computers and multiple display and control screens in the vehicle can be realized through the fiber channel network. The results show that it is simpler and more efficient to use the Wayland graphics protocol to render the graphical interface；the vehicle fiber channel network has the high reliability，high transmission rate，strong real-time and low delay，which can meet the needs of future vehicle integrated electronic systems；after actual testing and experience，the human-computer interaction display and control technology designed has a good human-computer interaction experience and fully meets the needs of vehicle use. This technology can provide reference for the development of a new vehicle human-computer interartion display and control technology scheme.

Straight Driving Efficiency Assessment of Vehicle Transmission Device Based on the Median-rank Weighting

ZHANG Jinbao， ZOU Tiangang， GAO Xiucai， HUANG Ruiyan， GUI Peng， LIU Hongzhe

2022, 43(S1):  54-59.  doi:10.12382/bgxb.2022.A018

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Transmission efficiency is one of the important indicators for the performance assessment of vehicle transmission device，which needs to comprehensively consider the influence of various factors. Considering the influence of many factors in the transmission process，a weighting method of no-load power loss and loading efficiency based on median rank is proposed to shorten the test time and obtain a stable comprehensive performance evaluation index of transmission efficiency in straight driving mode，in which the gear positions include six straight driving gear positions and two reverse gear positions under no-load and loading conditions，and four rotating speeds are tested for each gear position. There are seventy-five transmission efficiency test samples at each rotating speed. The median rank weighting method for no-load power loss and loading efficiency is used to obtain the normalized comprehensive performance assessment indicator and give the criterion of whether the comprehensive performance of vehicle transmission efficiency is qualified.The results show that the stable normalized comprehensive performance assessment indicator of transmission efficiency under straight driving mode could be obtained in the first 10 speed measuring points, while the transmission performance of vehicle transmission device could be judged from the criterion.

Design of Object Lens Imaging System Based on Wave Aberration Method

TIAN Jiwen， PIAO Yan

2022, 43(S1):  60-65.  doi:10.12382/bgxb.2022.A026

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Based on the theory of optical image examination，the wavefront error is calculated from the ideal wavfront and represents the gap between the actual wavefront and the ideal wavefront. The ideal wavefront can be understood as a wavefront centered on the ideal home point，so the optical path error is also known as the wavefront aberration. The aberration theory is extended to the refraction optical system，so that it can be applied to the calculation of the aberration of the resultant optical system when the beam is slanted. Word in optical imaging system in consideration as space is the relationship between the refractive index，and the definition of the incidence angle between party and makes the calculation expression of wave aberration hold unified application of extended surface aberration theory of imaging optical system aberration analysis calculation，comparing with the results of Zemax ray tracing，verify the validity of the wave aberration theory，the aberration theory，the aberration theory of incident light beam imaging optical system.The system design，image quality evaluation and optimization provide an effective means of analysis.

Infrared Image Moving Object Detection Technology Based on Onboard Computer

LI Bo， WANG Bo， HAN Jingye， YANG Zongrui， LI Linyun， FU Changzhi

2022, 43(S1):  66-73.  doi:10.12382/bgxb.2022.A012

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As an important part of driverless vehicle platform，the environmental perception system is the basis and premise to realize as the path planning and decision control function. Based on the onboard computer，an infrared image moving object detection system in complex scenes is designed.The browser/server architecture is used in the detection system. After the client browser requests for services，the server applies the improved YOLOv2 algorithm to detect the infrared images transmitted by the onboard RapidIO high-speed bus in real time.the missed detection and error detection rates are effectively reduced by dimensional re-clustering and improved activation function.In order to make up for disadvantages of low contrast and weak texture features of infrared images，bilateral filtering image enhancement algorithm based on histogram equalization is proposed，which can effectively maintain the image contour details.The results show that the real-time detection accuracy of the improved YOLOv2 is increased by 4.1% compared with the original algrithm and the image preprocessing significantly improves the detection accuracy.

Simulation of Ground-air Cooperative Combat Based on Reinforcement Learning in Localization Environment

LI Li， LI Xuguang， GUO Kaijie， SHI Chao， CHEN Zhaowen

2022, 43(S1):  74-81.  doi:10.12382/bgxb.2022.A005

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For the actual problems of lack of actual combat scenes and insufficient training data in the military field， the deep reinforcement learning method is used to realize a multi-agent decision-making model for the unmanned ground and air cooperative combat simulation. A virtual simulation environment is built using Phytium CPU and Kunlun K200 NPU as hardware platform and Kylin V10 operating system as software environment. The simulation environment state representation，agents’ action space and rewards mechanism are set， and a multi-agent decision-making model based on the deep deterministic policy gradient (MADDPG) algorithm is established. Simulation experiments verified that MADDPG algorithm can make reward value converge gradually in ground-air cooperative combat simulation scenarios， thus proving the effectiveness of MADDPG algorithm in the simulation scene of the ground-air cooperative combat.

Design and Implementation of Automatic Leveling Control System for a Rocket Launcher Ammunition Supply Vehicle

WANG Wu， FU Xiaoqiang， LU Qingshan， XUE Peng， YUE Xiaodong

2022, 43(S1):  82-87.  doi:10.12382/bgxb.2022.A022

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For the operational use requirements of a certain type of rocket launcher ammunition supply vehicle，an automatic leveling control system based on hydraulic drive is designed.According to the leveling strategy of existing control system，an angle error leveling method is put forward for the automatic leveling control system. The leveling strategy of “only go up” and a lower leg heightening can be used to effectively solve the “virtual leg” in the process of leveling. The automatic leveling data collected under no-load and full load was analyzed. It is concluded that the proposed leveling strategy can be used to quickly and smoothly level the vehicle body，and the automatic leveling control system has strong anti-interference ability，short leveling time，high stability，high reliability for use in military equipment，and can promote the intelligence level of weapons and equipment.

Design of Naval Gun Remote Monitoring System Based on CAN Bus and Large Capacity Data Storage

DAI Pu， LI Yongfeng， HAN Jiangang， LIU Panling

2022, 43(S1):  88-96.  doi:10.12382/bgxb.2022.A006

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For the problem of high complexity and difficult fault diagnosis and condition monitoring of naval gun equipment，a naval gun remote monitoring system based on CAN bus and large capacity data storage is proposed and designed. The status information of naval gun weapons is collected in real time through CAN bus. The system operation status is judged in real time based on expert knowledge base. When the operation status is abnormal，it is displayed in time. The collected information is stored online after adding time flag. Through the integrated design of naval gun state acquisition，processing，judgment，early warning and storage，the unmanned，remote and automatic monitoring of naval gun is realized，and the monitoring efficiency and system fault traceability are improved. It is of great significance to the safety operation and fault analysis of naval gun weapons.

On the Practice of Model-based System Engineering in Missile Development

SONG Yu， ZOU Ruping， WANG Jun

2022, 43(S1):  97-106.  doi:10.12382/bgxb.2022.A014

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As growth of information and intelligence，the multidisciplinary decomposition and exponential growth of software code lead to the increase in the demand analysis and design errors，schedule delay and cost overrun.The problem in the development process of missile system was analyzed.A V-shaped process model that uses model-based system engineering (MBSE) method is proposed，in which the multi-level specification and test are replaced with modeling and simulation.The propsed model contain three levels (operation，system and component) and three views (performance，test and design).The sample model established by system model language(SYSML) is demonstrated. The activities，components and key measures of support environment for an idea MBSE development process are presented.The results show thatMBSE method can be used to decrease the demand analysis and design errors and the dependence on the flight test for the missile development，reduce the development cost，and promote the advance in information and intelligence techniques.

Effectiveness Evaluation of Air-ground Guided Ammunition Based on Combat Simulation

WEI Wuchen， XU Shuo， HE Xiaofu， WANG Xiaoguang， YUE Tong

2022, 43(S1):  107-114.  doi:10.12382/bgxb.2022.A020

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The combat use and effectiveness e of air-ground guided ammunition is eveluated based on combat simulation. Considering the requirements of rapid response，platform security，launch flexibility，mission efficiency and effectiveness-cost ratio of air-ground guided ammunition，an effectiveness evaluation method of air-to-ground guided ammunition based on combat simulation is proposed.A combat simulation system is built. For the combat mission of close air support，the simulation calculation is made by taking GBU-16 laser guided bomb as an example，and the effectiveness of the simulated results is analyzed by using an analytic hierarchy process method，which provides a quantitative evaluation method for the combat effectiveness evaluation of air-ground guided ammunition，and plays an important part in the argumentation and operational research of weapon system.

Research on's Opening Distance of AHEAD Ammunition

WANG Ge， ZHANG Chun， LIN Zhiwei， WANG Baohua， TAN Hu， CHEN Chen

2022, 43(S1):  115-120.  doi:10.12382/bgxb.2022.A001

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To solve the problem that the opening distance of an advanced hit efficiency and destruction（AHEAD）ammunition is set to a fixed value in practical use，which can't achieve the maximum damage efficiency for different targets. A method for analyzing the influence of AHEAD ammunition's opening distance on the damage eefect of targe the target. A mathematical model of opening distance and terminal damage can be got by establishing the moving trajectory models of AHEAD ammunition before and after opening，a mathematical model of AHEAD ammunition's opening angle and a typical target model.Numerical simulation is carried out by using Matlab software to analyze the influence of opening distance of AHEAD ammunition on target destruction probability under the conditions of different shooting distances and different target characteristics. the rule of opening distance of AHEAD ammunition achieving the maximum damage effect in different operational situations can be got.

A Design Method of Flight Controller for Serialized Air-to-ground Missiles

ZOU Ruping， CHEN Shichao， ZHANG Kun， LI Peng， HUANG Chaofan

2022, 43(S1):  121-127.  doi:10.12382/bgxb.2022.A025

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A design method of flight controller suitable for various types of air-to-ground missiles is proposed to avoid the redundancy design of flight controller caused by the development of serialized air-to-ground missiles. The differences between the traditional flight controller and the flight controller suitable for serialized air-to-ground missiles are analyzed. Through the determination of multi-loop universal current-limiting resistance，the flight controller can effectively perform various types of missile ignition functions. The type of missile is judged by circuit code recognition，and then the corresponding missile control model is selected to achieve the efficient damage to the threatening target. The proposed method was verified through the closed-loop flight test of a serialized air-to-ground missile. The test data demonstrates that the proposed method can improve the universality of the flight controller，thus improving thedevelopmental efficiency of the serialized air-to-ground missile and reducing the developmental cost.

Combined Guidance Law Design and Simulation for Gliding Extended Range Projectile

FENG Changlin， CHEN Feng， YI Wenjun

2022, 43(S1):  128-132.  doi:10.12382/bgxb.2021.A031

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This paper takes the gliding extended-range guided projectile as the research object，and studies its guidance law design method for long-range flight and precise strike.In order to improve the range of gliding extended-range guided artillery shells，ensure the stability of long-distance flight，and achieve precise strikes on targets，a mid-to-end combined guidance control algorithm is designed，and the classical PD control method is used to carry out mid-guided ballistic tracking.Algorithm design；using the proportional guidance law， the terminal precision guidance algorithm is designed；based on the designed method，the ballistic simulation verification is carried out，and the simulation results show that the guidance algorithm can achieve precise strikes at different ranges and meet the design requirements.

Density Analysis of UAV Damage Element Based on Vertebral Space

XUE Shaohui， FAN Ji， TANG Xu， CHEN Xiaoming， WANG Fengge， HOU Yong， ZENG Yuyun

2022, 43(S1):  133-139.  doi:10.12382/bgxb.2022.A019

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Medium and large caliber advanced impact efficiency and destruction(AHEAD) projectiles have the advantages of good ballistic performance and large barrage spreading area. However， the density of fragments at various points in the inner space of vertebral body is different. The number of damage elements that are hit when the UAV is located at each point in the vertebral space was analyzed through experiment. The experimental results show that the number of damage elements in the vertebral area of the seven bursts of fire at 350 m away from the opening point can meet the damage requirements. This result can provide data reference and basis for the demand for resisting saturation attacks and destroying multiple aerial targets at the same time by a single artillery.

Design and Strength Analysis of Light UAV Landing Gear

WANG Pan， WU Hao， LIANG Yu， HU Xuecen， JI Xuesong， WANG Zhenyu

2022, 43(S1):  140-145.  doi:10.12382/bgxb.2022.A023

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A landing gear for a specific light UAV is designed and analyzed to make up for the lack of research on the landing gear or flight-assisting system of light UAVs. According to the actual application requirements，a design scheme of the landing gear structure and electrical system of a light UAV was proposed. Based on the weight of UAV，Ansys simulation software is used to establish a finite element calculation model，and the strength of landing gear structure was analyzed and simulated. The results of structural strength analysis show that the maximum deformation of landing gear is 0.6 mm，which meets the design requirements.The light UAV landing gear designed in this paper has the advantages of simple structure，light weight and high reliability，which provides a solution for related research and engineering applications.

UAV Detection Method Based on Domestic Embedded Intelligent Computing Platform

CUI Lingfei， GUO Yonghong， XIU Quanfa， SHI Chao， ZHANG Shuoyang

2022, 43(S1):  146-154.  doi:10.12382/bgxb.2022.A013

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A UAV detection method based on a domestic embedded intelligent computing platform is proposed to meet the actual requirements of anti-unmanned aerial vehicle(UAV) reconnaissance on the land battlefield. For the problem that UAV is small in size and not easy to be detected in the battlefield environment，the detection method is to use infrared and visible light images and video streams inputs for target detection. For the limited computing power and storage capacity of embedded platform，a lightweight deep neural network is built，and the feature extraction network in single shot multi-box detector(SSD) is replaced with MobileNet for model compression. The embedded platform Bitmain SE5 intelligent computing box is selected for verification， and the model conversion and transplantation are achieved. The experimental result shows that the proposed UAV detection method based on the lightweight deep neural network MobileNet-SSD can accurately determine the type of targets on the embedded intelligent computing platform， and the mean recognition accuracy and frame rate are basically same with those running in the development environment. It fully shows that the detection method can meet the requirements of the real-time and accuracy of UAV detection algorithm in the application environment in terms of speed and accuracy after being transplanted on the embedded intelligent computing platform.

Architecture Modeling and Effectiveness Evaluation of Equipment System under Manned and Unmanned Joint Operation Mode

LIU Zunfei， ZOU Bo， CHEN Xulin， ZHANG Wenjuan， YE Shuangping， PAN Jiangli

2022, 43(S1):  155-161.  doi:10.12382/bgxb.2022.A027

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As the application of information technology in military becomes rounded and in-depth，future operations are developing towards intelligent and joint operations，and show multiple complexity. Department of Defense architecture framework is utilized to model the equipment system under joint operation mode in multi-views. Then the effectiveness of equipment system is simulated and evaluated on the basis of observation，orientation，decision and action operation loop model. The results show that the proposed method has the capability of reflecting the essence of operation under the conditions of informatization，offering theoretical support to the optimization of equipment system. Moreover，it provides quantificational support in theory and information-link orientation for commanding joint operation andwinning wars under informationizatoin conditions.

Deep Learning-based Intelligent Target Recognition Technology for Electro-optical System

LI Liangfu， CHEN Weidong， GAO Qiang， XU Kailuan， LIU Xuan， HE Xi， QIAN Jun

2022, 43(S1):  162-168.  doi:10.12382/bgxb.2022.A004

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Intelligent target recognition technology is an important support of multi-dimensional and three-dimensional reconnaissance system of electro-optical system, which is the basis of multi-angle and omni-directional target positioning and perception analysis. Focusing on the three challenges of data，algorithm and computing power，an intelligent target recognition method based on multi-source information fusion is proposed to meet the needs of deep learning-based target recognition of electro-optical system in complex environment.The proposed method is to learn and train the images fused by multiple sensors so as to improve the ability to recognize targets.The target recognition technology based on multi-dimensional image fusion is used to label，train and learn the multi band fused image data，thus automatically identifying the multiple targets in the image. Experimental results show that the proposed method can be used to accurately identify and locate the fusion target.

Simulation Evaluation of Detection Probability of Air Defense and Antimissile Electro-optical Network

MA Youheng， YAO Linhai， DUAN Hongjian， LI Weijie， ZHAO Lei

2022, 43(S1):  169-176.  doi:10.12382/bgxb.2022.A003

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Single electro-optical device covers a small airspace and has a large detection blind area. It has a low detection probability for targets with strong invisibility and low altitude flight.Electro-optical networking can expand the coverage of airspace and improve the detection probability of targets.In order to obtain the optimal electro-optical networking scheme，its detection probability needs to be evaluated.A simulation method for target interception and data acquisition based on target motion model is given，and an adaptive weighted fusion algorithm based on least-squares estimation is used to process target data fusion. On the basis of single-station target detection probability，the calculation model of multi-station target detection probability and the calculation model of system detection probability based on overlapping coverage area of multi-station are established，and the evaluation method for target detection probability of networked electro-optical system is presented. The detection probability ofelectro-optical group network is quantitatively evaluated by taking the star distribution for an example. If the detection probability of single station is more than 80%，the detection probability of group network is more than 89.4%.The simulation and evaluation of detection probability of networking can provide data reference for electro-opticalnetworking scheme and support the construction of networked electro-optical detection system.

Operational Effectiveness Evaluation of Optoelectronic Equipment for Combined Arms Based on OODA Loop

GUO Leiping， DUAN Wenbo，LIU Yu， ZHANG Kuijia， SHI Kai， WANG Yawei

2022, 43(S1):  177-182.  doi:10.12382/bgxb.2022.A009

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The operational effectiveness of optoelectronic equipment for combined arms is evaluated based on observe-orient-decide-act (OODA) loop. The role of optoelectronic equipment based on OODA loop is analyzed，and an operational effectiveness evaluation model of optoelectronic equipment is established for the whole process of reconnaissance and attack. The index aggregation method is used to evaluate the operational effectiveness of the main optoelectronic equipment. The evaluated results show that the performance and quantity of optoelectronic equipment of observation unit have a significant impact on the combat capability of the system. When the overall combat capacity of strike unit is at a high level，the improvement of the overall combat capability by simply improving the performance of the observation unit is limited.The evaluated results of the proposed model are basically consistent with the actual situation.The results show that the combat capability of optoelectronic equipment can be objectively evaluated by using the evaluation model based on OODA loop to evaluate the combat effectiveness of optoelectronic equipment in the system-of-systems confrontation.

Research on Parallel Experiment Based on the Simulation Platform of Mission-engagement Level System

WANG Xun， GAO Liang， WEI Yongyong， LI Guangyun， ZHANG Tianci

2022, 43(S1):  183-188.  doi:10.12382/bgxb.2022.A015

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A method of heterogeneous interconnection between mission-level and engagement-level simulation platforms is explored to meet the requirements of large scene and refinement of system simulation. In the heterogeneous interconnection method for the system simulation，the functional layer middlewares are constructed based on the overall architecture of the existing simulation platform，and the data processing flow is designed data and the interaction service is formed through Socket communication.The overall function is designed according to business needs，the simulation data is collected and transmitted synchronously.The simulation experiments were designed，and the experimental results were analyzed to verify the feasibility of the proposed method.The mission level platform provides large scene action commands for the engagement level platform，and the engagement level platform provides the fine simulation of small scenes for the mission level platform. The design method could meet the requirements of brigade-level simulation under the background of all-dimensional and multi-angle joint operations.

Reliability Design and Analysis Methodfor Complex Mechanical System Based on Physics of Failure

LIU Qin， JI Guangzhen， CAO Pulin， LI Juan， LIU Ying

2022, 43(S1):  189-195.  doi:10.12382/bgxb.2022.A029

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The mechanical systems for weapon equipment have the following characteristics:complex structure，multi-failure modes，strong correlation，and work under complex and severe environmental stresses， such as vibration，shock，and high temperature，etc. Starting from the research on the failure mechanism of complex mechanical system and its key components，the influence of working conditions，environmental stress and time on system degradation or failure is analyzed，and the reliability models of component and system are established by combining simulation and experimentation. A set of reliability design and analysis processes and methods for complex mechanical systems based on physics of failure are proposed. This technology includes the system failure mode and mechanism analysis，the establishment of failure physical model，the reliability design and analysis of parts or structures，and the reliability and design analysis of mechanical system or mechanism，etc. The reliability degree and life of the system can be effectively predicted and evaluated by applying this technology to the key system of weapon equipment，and the improvement measures can be proposed to improve the reliability level of weapon system.

Reliability Index Distribution of Armored Equipment Based on System Engineering Method

ZHAO Jian， ZHANG Liang， LI Aoran， FENG Yu， ZHANG Yu， LIU Rui， LI Yi， LI Xinyong， ZHU Zhenlei

2022, 43(S1):  196-202.  doi:10.12382/bgxb.2022.A024

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The system evaluation method for systems engineering is used for distributing the basic reliability index of armored equipment. For a characteristic parameter testing system as an example，a system hierarchy analysis model is established，the distribution weights of the unit in the system are determined，and the calculation process is adopted by checking calculation.The results show that the system engineering method can be used to reasonably allocate the basic reliability indexes of armored equipment.

Research on Optimization of Exponential Distribution Timing Truncation Scheme for Joint Inspection of Equipment System ofSystems

GUO Zhiming， WANG Di， PANG Ting， LI Juan， ZHAO Dan， YANG Jianxin

2022, 43(S1):  203-207.  doi:10.12382/bgxb.2022.A028

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In order to solve the problem that there is no universal model to choose a sampling inspection scheme when determining a sampling inspection scheme under the exponential distribution case，an optimization model with the minimum risk distance as the objective is established，and the objective function and constraint conditions are given. When the optimal solution is difficult to be solved by the analytic method，the particle swarm optimization algorithm is used to decrease the difficulty of the problem solving. The basic principle and solving process of the particle swarm optimization algorithm are introduced. Finally，the feasibility and effectiveness of the model and algorithm are verified by specificexamples.

RMSST Design Based on Virtual Reality

LIU Lin， GONG Chen， LI Mengmeng， WANG Ran

2022, 43(S1):  208-213.  doi:10.12382/bgxb.2022.A017

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In addition to meeting the functional requirements of equipment，high-quality weapons and equipment should ensure high reliability，easy fault detection and maintenance， safe and easy to use，which is the goal of reliability，testability，maintainability，security and support (referred to RMSST) design.In this paper，the five characteristics design method based on virtual reality technology is described in general，then the characteristics and requirements of the five characteristics design are clarified，and the work that can apply virtual reality technology in the five characteristics design is put forward. Finally，a virtual system architecture for five characteristics design in virtual reality environment is preliminarily established.This paper summarizes the research direction that should be paid attention to in the future and makes a preliminary discussion to provide engineering means and methods for the realization of equipment comprehensive efficiency and the control and optimization of life cycle cost.The results show that the use of virtual reality technology to the abstract，the calculation of complex data into intuitive，users are familiar with the visualization of 3 d images，not only can make five design personnel intuitive understanding of the work content，avoid cross repetitive work，reduce the fault of omission，and can make the design better equipment using the results of the five design，continuous optimization improvement design method，Improve the quality of equipment，give full play to the role of five characteristics design.

Detection of Metal Surface Scratch Based on YOLOv4 Network Model

ZHANG Boyao， LENG Yanbing

2022, 43(S1):  214-221.  doi:10.12382/bgxb.2022.A011

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Metal surface scratch detection aims to achieve the classification recognition and precise scale localization of metal scratchs. The current traditional image processing methods are difficult to achieve the accurate localization and recognition of scratches due to their different shapes and low contrast with the background.A shallow neural network model based on small scale convolution kernel is proposed. The proposed model uses the correlation theory of small target detection to enhance the scratches at the data level first and then train the network model to achieve the accurate detection of surface scratches.Compared with the original YOLOv4 model， the proposed model can avoid the missing detection and false detection of insignificant scratches better， and also can extract the penetrating or long scratches more accurately and completely.The model can fully meet the requirements of accurate inspection of production line.

Analysis of Current Situation of Equipment System Construction

LI Juan, GUO Leiping, WANG Ning, JIAO Wen, HU Bingsu

2022, 43(S1):  222-226.  doi:10.12382/bgxb.2022.A030

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This text elaborated that the our army weapon material system turns the inevitable trend of the development, analyzing the system to turn to develop the existent problem currently, putting forward the new mode of the system development of “the need leads and sticks the true war tightly”, carrying out from hand over to equip to hand over the ability to cross over. This text set up the system management structure of “three lines proceed together, fast propulsion”, can provide the technique support for argument and implements that equip the system work.