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Responsible Institution: China Association for Science and Technology
Sponsor: China Ordnance Society
ISSN 1000-1093 CN 11-2176/TJ
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Chinese
Editor in Chief:
MAO Ming
Edited and Published by:
Editorial Board of Acta Armamentarii
Table of Content
31 May 2010, Volume 31 Issue 5
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Paper
Experimental Study on Matching of Vehicle Engine Starter Under Low Temperature
WANG Zhong
1
， XU Guang-ju
1
， YE Fei-fei
1
， HUANG Hui-long
1
， WANG Lin
2010, 31(5): 529-533. doi:
10.3969/j.issn.1000-1093.2010.05.001
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The main influencing factors on the vehicle's starter under low temperature were anal
Research on Synchromesh-Based AMT Shifting Process
ZHAO Xi-jun, LIU Hai-ou, CHEN Hui-yan
2010, 31(5): 534-540. doi:
10.3969/j.issn.1000-1093.2010.05.002
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A complicated model for shifting process of synchromesh-based automated mechanical transmission（AMT） was established. Then, the effects of shifting force on the jerk and friction power were analyzed. A new cascaded shifting controller was developed to resolve the contradiction between the jerk and friction power. In the controller, a fuzzy logic control algorithm based on the jerk feedback improves the shifting quality, and a comparison algorithm takes the friction power in the synchronizer ring as a constraint condition to improve the lifetime of the synchronizer. The bench tests were carried out to verify the control strategy the experiment results indicate that the strategy mentioned in this paper is feasible.
Analysis and Solution of Amphibious Vehicle's Toss Motion in Wave
XU Guo-ying， XUE Jin-lu
2010, 31(5): 541-546. doi:
10.3969/j.issn.1000-1093.2010.05.003
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Based on the wave-resistance theory for ship, it studies the toss motion of amphibious vehicle in wave. Five kinds of amphibious vehicles were analyzed. Inherent periods and damping coefficients in latitudinal, longitudinal and vertical tosses were obtained from experiment and calculation. Further, three types of toss equations were solved. Based on those results, three types of typical toss motions under different Beaufort wind scales were analyzed, and the methods to avoid severe toss motion and feasible recommendations in use were put forward.
Analysis on Structure Dynamic Characteristic of Motorcycle Frame with Engine
ZHANG Zhi-fei， XU Zhong-ming， HE Yan-song
2010, 31(5): 547-552. doi:
10.3969/j.issn.1000-1093.2010.05.004
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The dynamic characteristic of motorcycle frame is an important factor for its comfortableness. Currently, the influence of engine on the frame's dynamic characteristic is not paid enough attention. The dynamic characteristics of frame with and without engine were analyzed experimentally and analytically. The results show that the engine influences the frame's structure characteristics greatly, thus, the modal characteristic of the frame with engine is more significant for studying the motorcycle's comfortableness. Analyzed and calculated some frames with engine, an effective and simple finite element modeling method for the frame with engine, where the engine was considered as a mass point connected to the frame by MSC.Nastran RBE2 element, was presented and validated, and it can be used to predict the influence of engine on the frame's dynamic characteristic in the design stage.
Calculation of Amphibian Vehicle Buoyant Center in Arbitrary Inclining State
LIU Feng， SUN Wei， DONG Zhi-ming
2010, 31(5): 553-557. doi:
10.3969/j.issn.1000-1093.2010.05.005
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In order to resolve the problem of buoyant center calculation in arbitrary inclining state, 3D modeling of amphibian vehicle was constructed by using SolidWorks. Both inertial and non-inertial coordinate systems were established to describe the buoyant center and inclining state of the amphibian vehicle. the relations of rolling and pitch angles with the coordinate transformation were studied. Using API functions in SolidWorks and vector operation, a bisection method and its iterative interval to find the buoyant center and the vehicle's section in the water were decided. A solving program for the buoyant center in arbitrary inclining state was formed after secondary development of SolidWorks, and it was used applied to floating state calculation. Compared with traditional methods, the calculation is more fast and accurate, and it is unnecessary to simplify the vehicle's shape. It provides an effective method for the floating state design and stability analysis.
The Influence of Synchronous Blinking Jamming on Radar Seeker Antenna Servo System
LI Ping， GENG Xiao-ming， YAN Xiao-peng
2010, 31(5): 558-561. doi:
10.3969/j.issn.1000-1093.2010.05.006
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For the study of jamming principles of synchronous blinking jamming on Radar see
Research on Methods for Compensating Temperature of Mechanically Dithered RLG
ZHANG Peng-fei， WANG Yu， TANG Jian-xun， YU Xu-dong
2010, 31(5): 562-566. doi:
10.3969/j.issn.1000-1093.2010.05.007
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The relation of mechanically dithered RLG's bias to multi-temperature was studie
Analysis of the Landing Impact Performance for Lunar Landing Leg with Transient Dynamic Method
WAN Jun-lin
1
， NIE Hong
1
， LI Li-chun
1
， CHENG Jin-bao
1
， ZE
2010, 31(5): 567-573. doi:
10.3969/j.issn.1000-1093.2010.05.008
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The landing impact performance of lunar lander is the key factor to soft-land o
Multidisciplinary Design Optimization for Marine Supercharger Turbo
LI Lei， AO Liang-bo， LI Yuan-sheng， YUE Zhu-feng
2010, 31(5): 574-579. doi:
10.3969/j.issn.1000-1093.2010.05.009
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The multidisciplinary design optimization for supercharge turbo was studied in order to resolve the multidisciplinary interactive. The temperature and pressure loads were transferred to the solid model by using distance-weighted function, and the structure deformation was transferred to the aerodynamic model by using mesh regenerated method. The multidisciplinary feasible (MDF) model of supercharge turbo considering aerodynamic, heat transfer, strength and vibration was obtained on the basis of information transfer, and their coupling was solved by iterating three times. In order to reduce analysis complexity, the design variables affecting performance significantly were chosen to optimize the system according to major factor analysis. The whole system was optimized by harmonizing all disciplines with weighted-average strategy.
Research on Turning Vibration Control Based on Immune PID Controller
LI Guo-ping
1
， LIN Jun-huan
2
， HAN Tong-peng
1
， PAN Xiao-bin
1
2010, 31(5): 580-585. doi:
10.3969/j.issn.1000-1093.2010.05.010
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A system of turning vibration control was developed and designed to solve the machining precision problem caused by vibration disturbance. A giant magnetostrictive actuator (GMA) in the system satisfied the vibration control requirements well. A special tool holder was designed with flexible hinge structure to fix the actuator and the cutting tool. The mathematical models of the actuator and the tool holder were presented. According to the immune principle, a immune PID controller was proposed to match the tool holder. Finally, the vibration control strategy was simulated by using Simulink/Matlab and then tested on a CNC lathe. The results show that the controller can effectively suppress the turning vibration.
Heuristic Search for Moving Underwater Targets Based on Markov Process
YANG Ri-jie
1
, WU Fang
1
, XU Jun-yan
1
, GAO Qing-wei
2
2010, 31(5): 586-591. doi:
10.3969/j.issn.1000-1093.2010.05.011
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On the basis of studying the heuristic search algorithm, the Markov process moti
Experimental Technique and Analysis
Experimental Study on Laser Milling of Micro Channel Groove
WANG Xu-yue， LV Shu-sen， HU Ya-feng， WANG Lian-ji， XU Wen-ji
2010, 31(5): 592-597. doi:
10.3969/j.issn.1000-1093.2010.05.012
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An experiment of laser milling of micro groove on die steel HPM75 was carried out. The influences of laser milling parameters and scanning direction on the milling quality were investigated by analyzing the material removal and the variation of melted chip. The results indicate that the laser power, the auxiliary gas pressure and the angle between scanning direction and melted chip removing affect the efficiency and quality of the laser milling greatly. The scanning path was also planned for a circle route, in which the amount of chip removal increased, the milling efficiency and quality increased also. With the optimized parameters, a groove of 0.29 mm in width, 0.28 mm in depth was milled, which reached the technique requirements before polishing. The results inspected by ZYGO profile-meter show that the groove has a good consistency in both width and depth anywhere.
Experimental Study of Contact Fatigue Property for 18Cr2Ni4WA Gears
WU Zhi-fei, WANG Tie, ZHANG Rui-liang
2010, 31(5): 598-602. doi:
10.3969/j.issn.1000-1093.2010.05.013
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It introduced the installation method of test machine and tested gears, and describes the determination of stress levels, in the contact fatigue experiment for 18Cr2Ni4WA carburizing and quenching gears. The test data in test points was acquired according to the failure criteria. The data could be fitted to obtain S-N curve. The causes of pitting on harden tooth surface were studied from three aspects, the gear surface residual stress, oil film press and carburizing thickness, according to the fracture morphology on tested gear and the surface hardening properties of the carburizing and quenching gears.
Comprehensive Review
Research Progress on Lightweight Ceramic Composite Armor Structure
JIANG Zhi-gang， ZENG Shou-yi， SHEN Zhi-qiang
2010, 31(5): 603-610. doi:
10.3969/j.issn.1000-1093.2010.05.014
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Aiming at the main threats for the lightweight armor vehicles，the structures，ballistic mechanisms and performance of lightweight ceramic composite armor against small armor-piercing projectile（APP）and high speed fragment were reviewed. The matching of material and thickness，the thickness and strength of the adhesive layer and the main shortcomings of the double-layer ceramic composite armor were discussed in detail. Some new structures and materials for lightweight armor were introduced briefly. The future research works on the boundary effect and multi-hit capability of ceramic composite target，functionally gradient materals（FGM）and metal-encased ceramic composite armors should be emphasized.
Research Notes
Study on Soot Emission of Diesel Engine Using Oxygenate Fuel
WANG Xian-cheng
1
， SUN Zhi-xin
1
， XIAO Jian-hua
2
， WANG Jian-xin
2
2010, 31(5): 611-615. doi:
10.3969/j.issn.1000-1093.2010.05.015
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A bench experiment on soot emission of an armed vehicle's diesel engine with oxygenate fuel was carried out. The effects of bio-diesel fuel and dimethyl carbonate (DMC), as oxygenate additive, on engine smoke were investigated. The results show that, adding bio-diesel of 20% into the fuel, the cylinder pressure curve moves forward slightly, the performance drops a little, and the soot emission decreases by 22%～46% in middle and high speed with 0~100% load; adding bio-diesel of 20% and DMC of 10%, the cylinder pressure curve moves backward and the peak value decreases, the external characteristic torque drops by 5%, the soot emission decreases by 25% to 61.5%. The NO
x emission for both cases increases by 10% in some conditions.
Design of a Practical Rotation-Modulated Gyro North-Finder
XU Hai-gang， GUO Zong-ben
2010, 31(5): 616-619. doi:
10.3969/j.issn.1000-1093.2010.05.016
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A practical rotation-modulated north-finder was put forward which consists of
Analysis on Constitutive Relation in Meso-scale Cutting Process
JING Xiu-bing， ZHANG Da-wei， LIN Bin
2010, 31(5): 620-623. doi:
10.3969/j.issn.1000-1093.2010.05.017
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By using strain gradient theory, a material's constitutive relationship was formulated in the meso-scale cutting process. The constitutive relationship considering the size effect was constructed. Based on the relationship, the material's stress-strain was studied under different cutting conditions. The results show that the material behaviors is approached to Johnson-Cook（JC） model gradually with the increase of cutting depth；if the rake angle becomes large, the shear angle and internal stress of material increase, and the size effect becomes more obvious, thus, the rake angle shall be bigger properly for the meso-scale cutting. Also, the tool edge radius affects the material behaviors significantly, the size effect becomes more obvious with the decrease of the radius. It must be small enough to realize the meso-scale cutting.
Workspace Analysis and Optimization of a 3-DOF Precision Positioning Table
JIA Xiao-hui， ZHANG Da-wei， TIAN Yan-ling
2010, 31(5): 624-630. doi:
10.3969/j.issn.1000-1093.2010.05.018
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In order to realize 3-dimensional positioning with nanometer level in nanoimprint lithograph（NIL）, a piezo-driven table with 3 DOF flexible parallel configuration was designed. Based on pseudo-rigid-body（PRB）modeling theory, both the inverse kinematics and velocity models were established by simplifying the single-axis flexible hinges as ideal revolute joints and torsion springs. In view of the physical constraints imposed by flexible hinges, the workspace of the table was investigated. And for the purpose to achieve a maximum workspace subjected to the given dexterity indices, its kinematic optimization was carried out. The numerical simulation was undertaken to validate the work.
Impact of Step Size on Acceleration Harmonic Suppression of Electro-hydraulic Servo Shaking Table
YAO Jian-jun
1
， FU Wei
1
， HU Sheng-hai
1
， HAN Jun-wei
2
2010, 31(5): 631-635. doi:
10.3969/j.issn.1000-1093.2010.05.019
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Because of the nonlinear characteristics of electro-hydraulic servo shaking table, its acceleration output corresponding to a sinusoidal input contains higher harmonics which cause harmonic distortion. Using LMS adaptive filtering algorithm, an adaptive harmonic suppression algorithm is developed. The reference signals are filtered by an adaptive filter to obtain the harmonic suppression signal adding to the system input and auppressing the harmonic in the acceleration response. The test results show that the step size of the adaptive filter affects the convergence rate of harmonic suppression greatly. The influence of LMS adaptive filtering algorithm itself is analyzed.
Research on Surface Residual Stress of Nano-composite Ceramics After Two-dimensionalUltrasonic Grinding
XUE Jin-xue， ZHAO Bo
2
， WU Yan
2
2010, 31(5): 636-640. doi:
10.3969/j.issn.1000-1093.2010.05.020
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The surface residual stresses of nano-composite and zirconia ceramics after two-dimension ultrasonic grinding and common grinding were studied by using X-ray diffractometer. The results show that the residual stresses are the comprehensive effect of grinding parameters, phase changing stress and cracks releasing stress. Under the same grinding condition, the tangential residual tensile stress produced by the ultrasonic grinding is smaller than that by the common grinding, and the normal residual compressive stress is larger. The smaller the grain is, the less the residual tensile stress. The residual compressive stress is produced, if the materials are removed by plastic mode. The m-phase change rate in the ultrasonic grinding is smaller than that in the common grinding.
Analysis of Component Reliability Based on Equivalent Load
GAO Peng， XIE Li-yang
2010, 31(5): 641-645. doi:
10.3969/j.issn.1000-1093.2010.05.021
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The relationship between reliability and loading times, considered the strength degradation,was studied. When strength degrades and random loading acts many times, the traditional load-strength interference model can not be applied to the reliability calculation. Taking the damage caused by random loading, a reliability model based on the equivalent load was proposed. When the loading process is a Poisson process, a time-dependent reliability model could be used, assuming that the strength is the function of loading times magnitude of loading. In addition, if the components were subjected to work and environment loads simultaneously, a reliability model under multi-loading was available. The calculation results show that the strength degradation will affect the reliability greatly. The models proposed in this paper are suitable for the reliability calculation, when the strength degrades.
Compound Fault Diagnosis for Gearbox Based on Blind Source Separation
TIAN Hao， TANG Li-wei， TIAN Guang
2010, 31(5): 646-649. doi:
10.3969/j.issn.1000-1093.2010.05.022
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Aiming at the shortage of the blind source separation（BSS）in processing non-linear compound fault signals, the kernel independent component analysis（KICA）was used in the performance test and fault diagnosis for the gearbox. The principle of KICA was introduced and then illustrated with simulations. Finally，combined with envelope order spectrum analysis, this method was used to diagnose the gearbox with two types of faults. The fault characteristics were found out, and the faults were distinguished successfully.
Neural Network Modeling Based on Genetic Algorithm for Mine Sweeping Plough of a Certain Weapon
TONG Zhong-zhi
1
， ZHANG Yuan
1
， XING Zong-yi
1
， QIN Yong
2
， J
2010, 31(5): 650-656. doi:
10.3969/j.issn.1000-1093.2010.05.023
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A method for designing the radial basis function neural network based on the gen
