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1999 Vol. 25, No. 6

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Overview of Adaptive Structures
Xia Renwei
1999, 25(6): 623-628.
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The technical motivation that stimulated the initial research in adaptive structures was the goals of attenuating and controlling the vibration motion and maintaining the shape of large flexible space structures,which can be adapted through automatical response to internal or external stimulations b...
Study of System Simulation of Satellite Constellation
Xiang Kaiheng, Xiao Yelun
1999, 25(6): 629-632.
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A study of system simulation of satellite constellation is introduced. System simulation would play an important role in Computer Aided Design (CAD) of satellite constellation. From the point of view of orbital dynamics, the concept and requirements of system simulation of constellation are presente...
Adaptive Attitude Control of Extra-Vehicular Activity
Han Chao
1999, 25(6): 634-638.
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Extra-Vehicular Activity (EVA) is one kind of aided devices for astronaut's acting out of the spacecraft. Because of the mass property uncertainties and variations, the attitude control of EVA is a nonlinear and time variant control system with the uncertain parameters. This paper presents the study...
Pre-and Post-Processor Development Based on MSC/Patran and Applications of Structural Optimization System
Huang Hai, Tao Qian, Ke Wen
1999, 25(6): 639-642.
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Under UNIX environment and on MSC/Patran platform, a pre-and post-processor of structural optimization system is developed. The work is done with adding special commands and windows using the development tool PCL provided by Patran for the customization of MSC/Patran. The available modules of numeri...
Research on Conceptual Design Supporting Concurrent Engineering
He Linshu, Wang Hongqi
1999, 25(6): 643-646.
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One of the crucial problems of CE (Concurrent Engineering) is conceptual design. Although MDO (Multidisciplinary Design Optimization) has had obvious progress, it does still not satisfy a variety of special requirements during conceptual design of products. In order to cope with the difficulties for...
Study of a Practical and Efficient Structural Optimization Method
Zhang Yuzhu, Zhang Ya
1999, 25(6): 647-650.
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Original mathematical programming is approximated with quadratic programming which is solved by generalized multiplier method. The following approximating approaches are utilized: 1.Talor formula is used to condense the object function into a second order function in logarithmic form. 2.Duffin appro...
New Type Isolator Design Based on the Principle of Variable Rigidity
Sun Bing, Nie Jingxu
1999, 25(6): 651-654.
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On basis of variable rigidity principle,by combination of the advantages of rubber and metal vibration isolator,a composite structure isolator with special shape elastic element and damping amplitude limiter is designed.It has a characteristic of small compressibility, large damping, long life and f...
Neural Network for Estimating the Main Parameters in Flight Vehicle Preliminary Design
Nie Rongmei, Xia Renwei, Chen Wangchun
1999, 25(6): 655-659.
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With neural network technology developed rapidly in recent years,three parameter estimating networks for total mass,lift coefficient and drag coefficient are respectively structured successfully that play an important role in flight vehicle preliminary design.The result shows that trained parameter ...
Design Considerations for Anti Tactical Ballistic Missile
Chen Wanchun, Zhao Lihong, Liu Jiaqi
1999, 25(6): 660-664.
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By use of direct trajectory optimization method,the selection of overall design parameters of an anti ballistic missile for a 1000km range ballistic target is discussed. The following factors are taken into account in our research: the variation of parameters of the solid rocket motor,the constrains...
Decision and Information Fusion in Multiple Air Combat
Sheng Wei, Tong Mingan, Wang Honglun, Li Jianxun
1999, 25(6): 665-667.
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Decision and information fusion in multiple air combat means regarding every side in air combat as a whole system. It can overcome the shortage of traditional ideals of multiple air combat——every plane fighting for itself, no communication and cooperation among the friendly planes. This method combi...
Realization of Terrain Simulation in Research of Clobber Probability
Guo Qifeng, Zhou Tao, Guo Zhenhua, Zhou Huizhong
1999, 25(6): 668-671.
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Terrain numerical simulation is the prerequisite problem in study of terrain-following missile clobber probability by adopting digital simulation method. Three typical terrains are simulated using wave superpose method based on the work of full exploration of terrain model and its realization .Effec...
Studies on the Overall Project Design of Missile
Guo Zhenhua, Dong Changhong
1999, 25(6): 672-675.
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The whole process of missile overall project design is described by an example of air-to-air missile design, and the flow-chart is showed for demonstrating the procedure clearly. The method for the project evaluation and the way to confirm the weights used in the project evaluation are introduced. T...
Experimental and Numerical Studies on Aerospike Nozzles
Liu Yu, Zhang Zhengke, Cheng Xianchen, Zhang Zhenpeng
1999, 25(6): 676-679.
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This paper presents the designing procedures of the wall contour of aerospike nozzle using characteristic method and a sample result; obtains the numerical results of viscous side nozzle internal flow field from transonic to supersonic flow,the Euler solution of the flow field along the plug wall an...
Direct Numerical Simulation on 2-D H2/O2 Mixture and Flow
Cai Guobiao, Zhuang Fenggan
1999, 25(6): 680-683.
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The present work uses high order accuracy compact difference scheme and composites the computer code for 2-dimensional compressible low velocity H2/O2 mixing flow evaluating with time growth. Computation for subsonic, transonic and supersonic H2/O2 mixing flow with Reynolds number being 400 and Mach...
Model and Algorithm of Inverse-Problems on Fault Diagnosis for Propulsion Systems
Yang Erfu, Zhang Zhenpeng, Liu Guoqiu
1999, 25(6): 684-687.
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According to the requirements of study on fault diagnosis of large-scale liquid rocket propulsion systems, an inverse-problem model on fault diagnosis has been established and an algorithm to solve the model has also been put forward in this paper. The method is based on genetic algorithm (GA). Afte...
Transient Analysis of a Divert Thruster for Micropropulsion Systems
Zhang Guozhou
1999, 25(6): 688-691.
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In the past several years, the miniaturization of Liquid Rocket Propulsion Systems advanced tremendously. The advanced micropropulsion systems are characterized by the miniaturization, high pressure and fast response. For these micropropulsion systems, the mathematical models of components are deriv...
Numerical Investigation of Gas Dynamic Resonance Tube Heating
Liang Guozhu, Zhang Zhenpeng, Zhang Guozhou, Cheng Xianchen
1999, 25(6): 692-695.
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The heating phenomenon emerges in some conditions when a semi-open resonance tube is placed in a stream of gas. In this paper a numerical method based on one-dimensional nonstationary nonlinear Euler equations for an ideal and perfect gas is developed,and using MacCormack scheme,a physically explica...
Design of Rocket Reaction Turbine for High Efficiency
Zhuang Yunan, Zhang Guozhou, Liu Zhongxiang, Wei Mo
1999, 25(6): 696-699.
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In order to gain higher specific impulse, the rocket turbines for the closed cycle are reaction turbines with a lower reaction in the rotating vanes. This rocket reaction turbine is characterized by lowest pressure ratio,highest load and low aspect ratio. Under the design conditions of large medium ...
Numerical Calculation of 3-D Flow in SRM Chamber
Xiang Hongjun, Fang Guoyao
1999, 25(6): 700-703.
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The 3-D unsteady turbulent flow is simulated in the chamber of solid propellant rocket motor with finocyl type grains. It is based on numerical solution of the 3-D time-dependent ensemble-averaged Navier-Stokes equations, incompressible fluid and a high Reynolds number k-εturbulence model. The SIMPL...
Effects of Interfering Factors on Performance of Liquid Propellant Staged Combustion Cycle Rocket Engine
Zhang Lihui Zhang Zhenpeng
1999, 25(6): 704-706.
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A nonlinear mathematical model for the static characteristics of a liquid rocket engine is presented. By using Newton method, the effects of each interfering factor on the parameters of liquid rocket engine are computed and analyzed. The analysis of the effects of the interfering factors on the engi...
Numeric Simulation of Plume Contamination in Vacuum
Du Jun, Wang Huiyu, Cai Guobiao
1999, 25(6): 707-710.
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The ejective flow produced by attitude control engine creates serious contamination to spacecraft, which can be classified, according to property, into mechanical,thermal, depository and chemical contamination. The calculation of this contamination is of referential value to the design and experimen...
Experimental Studies on Pressure Regulator Characteristic
Dai Wuye, Ma Bin, Zhang Guozhou, Liu Yu
1999, 25(6): 711-713.
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An experimental system of pressure regulator characteristic is introduced.The experimental settings with their function and performance are described in detail.The operation process of regulator characteristic experiment is presented.The dada acquisition of this experiment system is introduced brief...
Observability Analysis of Strapdown Inertial Navigation System on Moving Base
Fang Jiancheng, Zhou Rui, Zhu Shiping
1999, 25(6): 714-719.
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The SINS error model of alignment procedure on moving base is established. The observability of SINS in-flight alignment is deeply studied and thoroughly analyzed by means of the observability analysis theory and method of PWCS. In this paper, at first the movements of base are divided into two kind...
New Kind of Energy-Spectrum Entropy Image Focusing Evaluation Function
Zhu Shiping, Fang Jiancheng, Zhou Rui
1999, 25(6): 720-723.
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To counter the selection and design of image focusing evaluation functions in the field of computer vision, the fundamental concept and characteristics of image focusing evaluation functions are introduced firstly. Then some kinds of current main image focusing evaluation functions (such as gray sca...
Modeling and Control of Magnetic Bearing System Using Neural Networks
Zhou Rui, Fang Jiancheng, Zhu Shiping, Shen Gongxun
1999, 25(6): 724-727.
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The principle and its approximative linear modeling of magnetic bearing system are given. The linear controller based on linear control theory and simplified modeling is developed, which results in the performance degradation and limitation of magnetic bearing system. The method of modeling and cont...
Fast Initial Alignment Method of Inertial NavigationSystem on Stationary Base
Fang Jiancheng, Zhu Shiping, Yu Wenbo
1999, 25(6): 728-731.
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The initial alignment of INS is a very important procedure. It is very valuable to the INS used in various weapon system and civil system that the best alignment accuracy is obtained in the shortest time. Because of the poor observability of INS on stationary base,the estimation of the azimuth error...
Integration of Digital Detecting Circuit for Closed-Loop FOG
Song Ningfang, Zhang Chunxi, Ma Yingjian, Zhang Weixu
1999, 25(6): 732-734.
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Integration and digitalization are two key factors leading to the engineering application and batch manufacturing of FOG. By considering the FOG's technical situation and the technique of semiconductor in our country,the research on integration and optimization of digital detecting circuit for the c...
In Situ Study on PZT Modulator in Open-Loop FOG
Yang Yuanhong, Zhang Weixu, Ma Jing
1999, 25(6): 735-738.
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The application characteristic of PZT fiber-optic phase modulator used in open-loop Fiber Optic Gyroscope (FOG) was analyzed theoretically. The open-loop FOG performance defection due to the variation of modulation coefficient and phase delay was studied. Two kinds of in situ measurement methods wer...
Study on Simulation Computer System in Software Reliability Testing Platform
Liu Dongyan, Shen Gongxun
1999, 25(6): 739-742.
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The structure and functions of SRTP(Software Reliability Testing Platform) consisting of main control computer and stimulation computer are introduced. On the basis of expansibility and universality,the study is concentrated on scheduling strategy and key implementation technology in simulation comp...
Development of the Prototype of High Speed Image Compression Device for Satellite
Cheng Zijing, Zhou Xiaokuan
1999, 25(6): 743-746.
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Hardware implementation of Multi Mode Adaptive Quantization Compression (MMAQC) algorithm for high speed image compression is investigated. Using pipeline and synchronization parallel arrays, the VLSI architectures for modeling, quantization and coding are proposed. The proposed hardware architectur...
Entropic Thresholding Method Based on Genetic Algorithm
Chong Jingsong, Zhou Xiaokuan, Wang Hongqi
1999, 25(6): 747-750.
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The method of entropic thresholding proposed by Kapur, Sahoo and Wong (KSW) is implemented using Genetic Algorithm(GA). Optimum parameters suitable for this algorithm are also given. KSW method has many advantages. However, it has weakness: it needs a great deal of computational time especially when...

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