Table of Content

30 April 2007, Volume 28 Issue 4

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Paper

Fuzzy Control of Automatic Transmission of Tracked Vehicle Under the Complicated Running Conditions

YI Jun, WANG Xue-lin, HU Yu-jin,MA Wei, LI Cheng-gang

2007, 28(4):  385-390.  doi:10.3969/j.issn.1000-1093.2007.04.001

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Based on human-vehicle-road closed loop system of tracked vemcle consisted of steering pa?rameter, road surface status and driver manipulating information, the primary principle of a fuzzy in?telligent shift control of tracked vehicle was proposed and the simulation model of a tracked vemcle powertrain was established to improve the adaptability of automatic transmission for tracked vehicle on complex running conditions. An intelligent fuzzy shift control system composed of a basic fuzzy shift strategy and a fuzzy modification module was developed to improve dynamic conditions and cross-coun?try maneuverability. The simulation result shows that the fuzzy shift strategy can improve the shift quality of a tracked vehicle under varying driving conditions and avoid sJtiift cycling effectively. There?fore the intelligent fuzzy shift strategies are effective and practicable.

A New Method To Measure the Parameters of Ground Properties for Tracked Vehicles

FANG Zhi-qiang, WANG Hong-yan, HE Xiao-jun,WANG Liang-xi

2007, 28(4):  391-395.  doi:10.3969/j.issn.1000-1093.2007.04.002

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The parameters of ground properties for tracked vehicle only can be measured by experi?ment. The traditional experiment is very complicated and restrained. The method calculating the pa?rameter values was proposed by mesured output torques applied to double side sprockets with a set of special measuring equipment. The parameters of ground properties for a certain tracked vehicle were measured and calculated using this method. The result proves the method to be effeclive.

Design on Dispersed Management System for Traction Battery Pack in Electric Transmission Vehicle

ZHANG Cheng-ning, ZHU Zheng, ZHANG Cai-ping，ZHANG Yu-pu

2007, 28(4):  396-401.  doi:10.3969/j.issn.1000-1093.2007.04.003

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According to the application request of traction battery pack which is used in electric trans-mission vehicle, a dispersed management system for battery pack was designed by way of bus commu?nication. The system is composed of many single battery test modules and an integrated battery pack monitor. The method estimating SOC was proposed by established model and algorithm based on adaptive neuro-fuzzy inference system at the operating condition of vehicle anve cycle. The voltage- controlled constant current source was designed to realize battery voltage acquisition precisely. The practical application shows that the system is characterized by stable operating, fine extension and pre?cise SOC estimation.

Fault Detection Based on Robust H2/H∞ Estimation for an Artillery Position Servo-system

LIU Guan-Jun, JIANG Yun-chun, QIU Jing

2007, 28(4):  402-405.  doi:10.3969/j.issn.1000-1093.2007.04.004

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The robust mixed H2/H∞ estimation method can solve the problem of robust estimation for the dynamic system with model uncertainty and noise. The steady-state variance and the instantaneous value are not more than the individual upper bound. For the FDI research of an artillery position servo- system, the robust H2/H∞ estimation was used to generate the residual to restrain the influence of model uncertainty and noise on fault detection and diagnosis. And the H- norm was used to optimize the design, the robustness to model uncertainty and noise was strengthened, and the sensitivity to the fault was guaranteed, as a result, the accuracy of FDI system was improved.

Numerical simulation Method for Thermal Characteristic of Air Boundary Layer of Rocket Fuze

LOU Wen-zhong, QI Bin

2007, 28(4):  406-410.  doi:10.3969/j.issn.1000-1093.2007.04.005

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Flying aerodynamic heating makes great effect on the reliability of nose fuze. The computa-tional model of air boundary layer of rocket fuze was established. Considering different material charac?teristics, correlative mathematic model was built by finite element analysis. The simulation was con?ducted by Fluent software. The simulation results show that the metnod possesses high accuracy and lays the foundation for thermal supervision of nose fuze.

Study on 6-DOF Trajectory Simulation of Course Correction Projectiles

XU Jin-xiang

2007, 28(4):  411-413.  doi:10.3969/j.issn.1000-1093.2007.04.006

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The makeup of course correction projectile weapon system and its working principle were studied, tne models of impulse force and impulse moment were established, the pursuit guidance laws used for course correction were analyzed and the method of establishing 6-DOF trajectory model of course correction projectile was presented. Typical course correction trajectory, orbit of laser detector optical axis and the influence of acting point of impulse force on miss distance were simulated by 6- DOF course correction trajectory simulation program. Simulation results indicate that direct impulse force nearby the mass center can achieve better effect on correcting final trajectory, the miss distance of velocity pursuit guidance law is smaller than that of body pursuit guidance law.

3D Numerical Simulation of Explosion in Concrete

WU Kai-teng, NING Jian-guo

2007, 28(4):  414-419.  doi:10.3969/j.issn.1000-1093.2007.04.007

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Based on cumulating damage model of concrete, the damage effect of explosive in concrete was simulated by the three dimensional simulating code MMIC3D under different buried depth and weight of dynamite (warhead), and considered including free surface. And the stress wave propaga?tion and the formed process were studied in the concrete explosive field of the infinite or the semi-infi?nite. The moving images of computational results dealt with the Visc2D and the Visc3D software illu?minate the development of the nollow, the formation of the pit and law of the surface motion form.Some results in accordance with physical and theoretical analysis were obtained.

Study on Digital Detection Technique of Weak Echo Signals in Pulse Laser Fuzes

SANG Hui-ping, DENG Jia-hao, HU Xiu-juan

2007, 28(4):  420-424.  doi:10.3969/j.issn.1000-1093.2007.04.008

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The detection of echo signals is an important technique in pulse laser fuzes. The basic method of digital detection of weak signals is that, through multipoint sampling and summing, the output SNR is improved by making correlation between echo signal and transmitting signal according to the auto correlation theory. On the basis of analyzing multiple-pulse accumulation method, the sin?gle pulse accumulation method was studied, moreover the multiplex accumulation method was put for?ward. The differences of above accumulation methods were discussed and the simulations were carried out. The result of simulation consists with theoretic analyzing. The block diagram and flow chart were given in the end.

Inter-pulse Pseudo-random Binary-phase Code and Linear Frequency Modulation Combined Detecting System

XIONG Gang, YANG Xiao-niu, ZHAO Hui-chang

2007, 28(4):  425-430.  doi:10.3969/j.issn.1000-1093.2007.04.009

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A new combined signal inter-pulse pseudo-random binary-phase code and LFM com- Dmed pulse train signal was proposed, and the frequency spectrum function, the ambiguity function and the range self-correlation function were deduced. The working principle of combined fuze was il?lustrated m detail and the formula of signals in each stage was deduced and the Doppler signal and its effect on the correlation output of combined fuze were analyzed. Finally, the resolution, ambiguity characteristics and the range cut-off characteristic were studied. Research results show that the com?bined detecting system possesses fine pulse compression performance, range cut-off characteristic and the superiority which other radar signals are not provided with.

Multiple Hypothesis Track Algorithm for Airborne Fire Control Radar with HPRF in FMR Mode

LIU Zhao lei, ZHANG Guang-yi, XU Zhen-lai,GUO Yan-chang

2007, 28(4):  431-435.  doi:10.3969/j.issn.1000-1093.2007.04.010

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A new target-tracking algorithm was proposed for airborne fire control radar operating with high pulse repetition frequency (HPRF) in frequency-modulated ranging (FMR) moae. Through mul?ti-hypothesis, the problems of target range estimation and ambiguity resolving were converted to the problems of static multiple model estimation and decision. The method to select the PRF used to track the target was also suggested according to the states of the survived hypotheses. Because the frequency measurements and the ambiguous range measurements are used to estimate the range of the target, compared with the conventional method, the multi-hypothesis algorithm can track target steadily with rapid convergence and high accuracy.

Study on Comparison of Ground Reflective Characteristics Between Day and Night

ZHU Yong-jian, CHEN Qian, WANG Xiaoxuan

2007, 28(4):  436-439.  doi:10.3969/j.issn.1000-1093.2007.04.011

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According to the procedure of low-light-level (LLL) imaging, a universal model of LLL imaging system was established by using expressions of spectral integrals, rhe spectrum distributions of sunlight and night sky radiation were analyzed. The effect of ground spectral reflectance on imaging was discussed deeply. And the difference of contrast between daytime image and LLL image caused by ground reflectance was studied. The results of experiments agree greatly with theoretical analysis. It is of momentous guidable significance for LLL image analysis and LLL image simulation.

Unascertained Factor Method of Dynamic Characteristic Analysis for Antenna Structures

LIANG Zhen-tao，CHEN Jian-jun, ZHANG Jian-guo

2007, 28(4):  440-444.  doi:10.3969/j.issn.1000-1093.2007.04.012

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The dynamic characteristic analysis model of antenna structures was built, in which the structural physical parameters and geometrical dimensions were all considered as unascertained vari?ables. And a structure dynamic characteristic analysis method based on the unascertained factor method was given. By the mathematics expression of unascertained factor and the principles of unascertained rational number arithmetic, the computational expression of structural characteristic was developed. At last, an example was given, in which the possible values and reliabilities of the unascertained structure characteristics were obtained. The rationality and validity of the presented method are demonstrated.

Research on Penetration Probability of Missile Fusillade

SHA Ji-chang, BU Xian-jin, REN Yi-guang

2007, 28(4):  445-448.  doi:10.3969/j.issn.1000-1093.2007.04.013

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Penetration probability is one of the basic indexes of the operation efficiency. Traditional fusillade mechanism of double-missiles and penetration probability were discussed systematically by analytical comparison and calculation. Under the definitions of the probability and the expected values of unhit attacking missile quantity, the expected values of anti-missile quantity and attacking missile quantity hit by a single anti-missile, the weapon operation efficiency was presented at various engage?ment patterns. The results show that double-missiles fusillading is the best manner for increasing weapon system efficiency.

Nine-degree-of-freedom Model of Bomb-parachute System

TANG Qian-gang, ZHANG Qing-bin，ZHANG Xiaojin,YANG Tao，KOU Bao-hua

2007, 28(4):  449-452.  doi:10.3969/j.issn.1000-1093.2007.04.014

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The dynamic behavior of bomb-parachute systems is extremely complex. By synthesizing and applying principles and analytical methods of parachute dynamics and multi-body dynamics, the nine-degree-of-freedom dynamic models of terminal descent of bomb-parachute system were developed. The model validity was verified by comparison with flight test data. The simulation program was de?veloped to analyze moving characteristic of bomb attitude and moving law of scanning point under wind gust. The result in above research can be applied to the design of bomb-parachute system and the guid?ance of its aerial delivery test.

Study on the Separation of the Missile Capsule Nose Cap

LUO Zhen, ZHANG Hai-jun, WU Qing-ping

2007, 28(4):  453-457.  doi:10.3969/j.issn.1000-1093.2007.04.015

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The separation of missile capsule nose cap is the result from the explosion cuttings of linear shaped charge flexible cutting ropes. To discuss the influence of the explosion cuttings on the missile capsule separation, the separate performance of the nose cap was studied by using numerical and experi?mental methods. It is concluded that the calculated results and the experimental data are preferably consistent and can be used in judging whether the separate performance of the nose cap is up to the re?quired standard.

Development of Steels for Shot by BOF

CHI Xiu-bin, HUANG Tao, LIU Chun-ming

2007, 28(4):  458-462.  doi:10.3969/j.issn.1000-1093.2007.04.016

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The production process and technology for developing a series of shot steels by top and bot-tom combined blown BOF were presented. The results show that chemical composition, macrostruc?ture, nonmetallic inclusion and mechanical property of the steels can achieve the request for shot-body materials; the stress cracks can be eliminated and the white spot tendency can be reduced by annealing for elimination of stress. The BOF process can realize a commercial production of a series of shot steel.

Theoretical and Experimental Study of Phase change Materials in Infrared Character Simulating

Lü Shu-mei，ZHANG Shuan-qin, LIAN Chang-chun, HUANG Chang-geng

2007, 28(4):  463-466.  doi:10.3969/j.issn.1000-1093.2007.04.017

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Application of phase change materials to infrared character simulating was theoretically and experimentally studied. The one-dimensional thermal physical model of the infrared emitting charac?teristics for phase change materials was given. The key parameters of phase change materials were cal?culated .And the theoretical results were experimentally verified. Application of phase change materi?als to tank decoy is further experimentally proceeded. The results show that the infrared characteristic contour of the tank decoy after applying phase change materials is distinct and the effect is fine.

Research on Numerical Simulation of Anticartridge Effect for Certain Aluminum Alloy Armor Plate

ZHU Jian-fang, WANG Wei-li, ZENG Liang

2007, 28(4):  467-470.  doi:10.3969/j.issn.1000-1093.2007.04.018

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Because of its specific protective performance, high strength aluminum alloy has been widely used as structural material for light armored vehicle. Based on the experiments, the process penetrating the target plate was simulated by using the method of finite element. Choosing the material model and the algorithm, three dimensional numerical simulation of anticartridge effect for certain aluminum alloy was realized and the parameter variation was demonstrated during the armor-piercing process. The regular pattern obtained from simulation is in accordance with that of obtained from testing. The re?sults show that this material is effective on resisting the attack of bullet.

Software Architecture on the Modeling and Simulation for Underwater Acoustics Information Systems

WANG Xi-min, CAI Zhi-ming

2007, 28(4):  471-476.  doi:10.3969/j.issn.1000-1093.2007.04.019

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The simulation of underwater acoustic information flow is an important way to research sonar performance and its engagement effectiveness in the ocean environment. The significance of modeling an open and sophisticated arcmtecture of the simulation software by object-oriented methods was analyzed, and the modeling processes and the way to represent the simulation architecture were presented. According to the requirements about the simulation system and the information flow, the simulation software logical arcmtecture was modeled by ooject-oriented method. The use case view captures the system requirements. The logical view shows the logical architecture for the system. The simulation software was decomposed into its constituent parts logically by layering and package parti?tioning for the maintainability. Applying the design patterns, the simulation software may be well ex?pansible and reusable. The simulation system involving multi-targets and multi-sonar was developed based on the architecture model. Practices show that the model meets the needs for simulating an open and sophisticated system.

Research on Estimation Model of Cost Based on the Parameter Method

Lü Hong, BAI Hua, WU Hao-peng

2007, 28(4):  477-480.  doi:10.3969/j.issn.1000-1093.2007.04.020

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The evaluation of weaponry cost plays an important role in military decision. How to esti?mate production cost reasonably and effectively under satisfied tht weaponry technical specification, is a question which military and weaponry development departments need to solve urgently. The parame?ter method is comparatively useful in the cost estimation of new type weapon system. The theory of multiple variable linear regression equation and grey system forecast was applied to resolve cost evalua?tion of the weapon system.

Experimental Techniques and Analysis

Mission Success Evaluation Model Based on EOOPN for the Division- brigade Combat Units

LIU Fang, ZHAO Jian-yin, GUO Bo

2007, 28(4):  481-486.  doi:10.3969/j.issn.1000-1093.2007.04.021

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The division-brigade combat units are the main units by that nations deal with middle or small scale conflicts currently or even tomorrow. The mission success evaluation model for these eche?lon units under the given maintenance support schedules can provide the decision-making for the estab?lishment and optimization of the maintenance support schedules. After analyzing the characteristics of missions and structure of the division-brigade combat units, the definition and approach of an extended oDjected-oriented Petri net model were presented, model of mission success evaluation for the division- brigade combat units was established by mentioned above results. By a mission scenario of an antiair?craft brigade, the validity and application of the model were demonstrated finally.

Comprehensive Reviews

Application Prospects of Proton Exchange Membrane Fuel Cells to Military Affairs

LI Guo-chao, JIAN Qi-fei, SUN Shao-yun

2007, 28(4):  487-490.  doi:10.3969/j.issn.1000-1093.2007.04.022

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Based on the comparison with existing electrical power equipment, the superiorities of pro?ton exchange membrane fuel cell(PEMFC) in future battle were analyzed. Then the current research status of PEMFC，s applications to various military fields was discussed such as submarine, communi?cation command systems, stand-by power supply, aerospace domain and emergency lighting. It is pointed out that PEMFC could meet the high-tech war ’s requirements such as excellent abilities of concealment and mobility, broad application scope, etc. And it has broad application prospect in the military domain.

Short Papers

Numerical Simulation of Missile Vertical Launching Procedure Based on VPT

XU Yue, TIAN Ai-mei, ZHANG Zhen-peng, CHEN Xiao-qing

2007, 28(4):  491-494.  doi:10.3969/j.issn.1000-1093.2007.04.023

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A dynamic simulation model of missile vertical launching procedure was built by use of virtu?al prototype technology(VPT) . The constitution of vertical launching system, the simplified model and the method of dynamic simulation were proposed. Dynamic simulations for several launching con?ditions were conducted and the adaptability and interference of various parts were analyzed. As a re?sult, the trajectory and attitude parameters during launching were gained and the security of missile vertical launching was verified.

Structural Reliability Analysis Based on Artificial Neural Network

YANG Duo-he, AN Wei-guang, LI Tie-jun

2007, 28(4):  495-498.  doi:10.3969/j.issn.1000-1093.2007.04.024

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The limit state function can be fitted by artificial neural network and its value can be gener?ated by function mapping relation of neural netwok for the structure reliability analysis. Adopting the thinking of Monte Carlo random samples, the probability analysis to the data of the big scope can be carried on, the mean value of the limit state function and standard deviation can be got, the reliability index of the structure system can be solved. Under the condition that the limit state function is unable to make explicit expression, a feasiole method was provided for reliability analysis question of the structure system.

A Single Phase Three-level Rectifier

CAI Zheng-ying, ZOU Yun-ping

2007, 28(4):  499-503.  doi:10.3969/j.issn.1000-1093.2007.04.025

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Three-level (TL) converter is very popular in the area of high voltage and high power. Based on general mathematical model of TL rectifier, a topology derivation method was proposed. A novel seven-switch TL rectifier was built and its operation principle was analyzed. The control scheme of TL rectifier (TLR) was analyzed and discussed. The results of simulation and experiment verify the correctness of the topology derivation method.

Anti-radiation UAV and Its Preventability

WANG Gu-chang, ZHENG Xing, FU Xiao-jin,ZHAO Run-shan

2007, 28(4):  504-507.  doi:10.3969/j.issn.1000-1093.2007.04.026

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Since the Middle East War and the Gulf War, many countries have been attacnmg more im-portance to UAV. One of the current trends is to develop attacking UAVs like anti-radiation UAV. In this paper, we summarize the battle rationale and the weapon system of typical anti-radiation UAV. We also analyze the effect of anti-radiation UAV on the modern war and a concrete approach of how to fight back the anti-radiation UAV is presented.

Research Notes

Evaluation System of Aircraft Survivability Based on Bargaining Weight

TONG Zhong-xiang, LI Shou-an, YE Guang-qiang, HUI Xiao-bin

2007, 28(4):  508-512.  doi:10.3969/j.issn.1000-1093.2007.04.027

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The evaluation criteria system for aircraft survivability was constructed by susceptibility, vulnerability and combat resilience for the first time. Aircraft survivability was evaluated by the evalu?ation indexes of which the weights are determined with proposed bargaining weight method. The bar?gaining weight method brings different opinions into accord with the objectivity under the constraint of the minimum loss, can overcome the partial subjectivity in determining weights and evaluating. The example proves well the rationality and feasibility of the method. The evaluation system for aircraft survivability based on the bargaining weight method has active effects on aircraft survivability evalua?tion and design.