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2006 Vol. 32, No. 01

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Novel approach to improving the performance of anti-G suit for pilots
Yang Guofu, Lin Guiping, Wu Baomin, Zou Lei
2006, 32(01): 1-3.
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Pressure decrease device and pressure discharge valve were separately put between abdominal bladder and capstan bladder in capstan anti-G suit and then the pressure in the abdominal bladder was reduced to approximately 40% of the capstan pressure.The novel pressure decrease technique was applied in ...
Numerical simulation of three dimension viscous flow of fan/compressor with tip clearance
Li Xiaojuan, Gui Xingmin
2006, 32(01): 4-7.
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A three dimension numerical simulation software named NUMECA(numerical mechanics application) was used to calculate the tip clearance flow of fan/compressor. The flow field performance under design speed condition was obtained. The results show that when back pressure of by-pass duct increases, the ...
Improved star map identification algorithm based on Hausdorff distance
Quan Wei, Wang Guangjun, Fang Jiancheng
2006, 32(01): 8-12.
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To solve two problems that the identification algorithm based on Hausdorff distance have the slow recognition speed and being very sensitive for the rotation of lens of star sensor,an improved star map identification algorithm based on Hausdorff distance was proposed. In this method, vector distance...
Three-point step-by-step generating r-type adaptive grid technique
Chen Xuanyou, Dong Haitao, Lee Chunhian, Zhou Yue
2006, 32(01): 13-17.
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In order to distribute grids correctly according to certain flow parameter grads but not to increase grid number, a step-by-step generating technique for r-type three points adaptive grid was proposed based on an averaged total variation concept. By this method, the grid location could be gradually ...
Vibration control design and simulation method for complex structures
Luo Xiaoping, Huang Hai, Xian Kuicheng
2006, 32(01): 18-21.
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A new vibration control design method based on FEM (finite element method) was proposed for structures to avoid the model error due to simplification and model reduction, in order to solve the difficulty of complex structures modeling and to improve the accuracy of the control design. The method cou...
Optimum installation azimuth of star sensor for spacecraft celestial navigation
Song Lifang, Fang Jiancheng
2006, 32(01): 22-26.
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Starlight angular distance detected by star sensor and horizontal instrument as the observation is often used for spacecraft autonomous celestial navigation. Installation azimuth of star sensor has a significant effect to navigation precision. An investigation on autonomous celestial navigation usin...
General integrative test system of unmanned aerial vehicle
Lu Aimei, Li Xinjun, He Jin, Wang Song
2006, 32(01): 27-30.
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A general integrative test system of UAV(unmanned aerial vehicle) was designed to improve the general capability of integrative test system of UAV and to increase the test system’s precision of testing. The general capability of this system was developed in aspects of design of software and hardware...
Numerical simulation of compressible and incompressible flows in mix-compression axisymmetric supersonic inlet
Chen Bing, Xu Xu, Cai Guobiao
2006, 32(01): 31-35.
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A structure grid, multi-block computer code was developed for both compressible and incompressible flow simulations by solving the preconditioned NS(Navier-Stokes) equations with LU-SGS(lower-upper symmetric-Gauss-Seidel) implicit time integration method. The finite volume method was used to discret...
Calculation of diffuser flow using GAO-YONG turbulence equations
Ren Xin, Gao Ge
2006, 32(01): 36-39.
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A two-dimensional incompressible diffuser flow was numerically simulated employing no staggered grid arrangement and incompressible SIMPLE method to solve GAO-YONG turbulence equations. The problem of checkerboard prediction of pressure was cured by evaluating the cell face velocities by the momentu...
Simulation and optimization of liquid propellants rocket engine for system design
Zheng Yuntao, Tong Xiaoyan, Cai Guobiao, Chen Jun
2006, 32(01): 40-45.
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The system simulation model and the relevant multi-objective optimization model were established for a type of liquid propellants rocket engine. A system simulation procedure was programmed. Design parameters of system were optimized owing to different optimization objectives on iSIGHT software plat...
Components parameterization in helicopter conceptual design
Lu Xinlai, Liu Hu, Wu Zhe
2006, 32(01): 46-49.
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To satisfy the requirement of rapid modeling in helicopter conceptual design, a method was brought forward for classifying helicopter components on the basis of object-oriented technique, and a computer aided helicopter conceptual design system was developed. By applying NURBS(non-uniform rational B...
Application of novel method of digital to frequency conversion in Coriolis mass flowmeter
Zheng Dezhi, Fan Shangchun, Xing Weiwei
2006, 32(01): 50-52.
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A new data transforming method of D/F(digital to frequency conversion) was adopted to export frequency in the novel digital Coriolis mass flowermeter. The frequency output was completed by the crystal and the FPGA(field programmable gate arrays) together with the DSP(digital signal processing). The ...
Architecture of software GPS receiver and implementation of its acquisition algorithm
Zhao Yun, Zhang Qishan
2006, 32(01): 53-56.
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The design architecture of the software GPS (global positioning system) receiver in accordance with the current development level of the involved hardware technology was proposed, in order to develop the software radio technology application to designing and performing the GPS receiver. The requirem...
Fuzzy AHP and its application in effectiveness evaluation for radar netting
Gao Bin, Lü Shanwei
2006, 32(01): 57-60.
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Difficulties in evaluating effectiveness and selecting an optimum scheme for radar netting arise as a result of the different goals involved and the large number of attributes considered. Our approach was based upon a fuzzy extension of the AHP (analytic hierarchy process), which was applied to the ...
Aeroservoelastic stability analysis of non-linear structure
Liu Deguang, Li Chaohui
2006, 32(01): 61-64.
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The real aeroservoelastic systems usually have various nonlinear factors, which may induce unnegligible effects on the characteristics of the systems. A frequency-domain method was applied to analyze the aeroservoelastic stability on nonlinear structures with gap. In the equations of motion of the a...
Knowledge fusion based on D-S evidence theory and its application
Han Liyan, Zhou Fang
2006, 32(01): 65-68.
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Knowledge fusion is a new concept proposed at the end of last century. The fused knowledge is referred as method, experience and idea as well as data and information. A new knowledge fusion method based on D-S(Dempster-Shafer) evidence theory was presented and applied to corporate failure prediction...
Realization of single side working mode of active magnetic bearings
Xing Tao, Zhang Qingchun, Li Guodong, Liang Yingchun
2006, 32(01): 69-73.
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It is difficult to provide an accuracy model for an AMB(active magnetic bearing) system due to the strong nonlinearity among magnetic force, the currents flowing in the coils and the displacements between the rotor and the AMBs. The bias currents in the coils increase the system power loss. For AMBs...
Design of buffer architecture for multi-media stream microprocessor
Wang Guang, Shen Xubang
2006, 32(01): 74-78.
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The characteristics of media processing applications are poorly matched to conventional microprocessor architectures. The growing processor-memory performance gap was solved. The communication bottlenecks of traditional microprocessor, which is used for media processing application, were discussed. ...
Focusing ultrasonic levitation
Pan Xiangsheng, Xing Lihua, Li Xun, Zhang Deyua
2006, 32(01): 79-82.
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The technique of ultrasonic levitation has a wide application in the containerless processing and manufacturing of materials and the status simulation of space on the Earth. Taking advantage of the principle of ultrasonic focusing, a single axis ultrasonic levitation system was set up with the radia...
Numerical simulation of consumable-rod’s thermal-mechanical behavior in friction surfacing
Liu Xuemei, Zhang Yanhua
2006, 32(01): 83-87.
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By finite element method and rigid-viscoplastic model, the coupling of 3-D temperature field and deformation field of consumable-rod during friction surfacing process was simulated. Temperature change and deformation of consumable-rod were analyzed. The factors influencing temperatures were discusse...
FEM simulation for residual stress in quenched aeronautics aluminum alloy thick-plate based on rolled residual stresses distribution
Zhao Lili, Zhang Yidu
2006, 32(01): 88-91.
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The residual stresses of 7075 aluminum alloy thick-plate in the process of rolling and quenching was simulated by using highly non-liner software MSC.Marc and elas-plastic large deformation FEM methods. In addition, the residual stresses of rolling, temperature rising-preservation-falling were simul...
Geometrical characteristics of structural model for 3-D braided composites
Lu Zixing, Yang Zhenyu, Liu Zhenguo
2006, 32(01): 92-96.
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It has significant effects on the FEA(finite element analysis) results of the mechanical properties of braided composite to set up a reasonable structural model of 3-D(three-dimension)braided composite. The braided composite after molding was taken as a study object. According to the experimental re...
Experiment on structural formation and mechanism of strength increasing of stabilized soil
Ning Jianguo, Huang Xin
2006, 32(01): 97-102.
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For the hardening process of the stabilized soil, a new structural model of stabilized soil was proposed that the structure formation of stabilized soil included soil particle cementing and pore filling. Based on the new structural model, when silt was used for soil sample and cement for hardening a...
CAD/CAE/CAM expert system of cathode design of turbine blades in electrochemical machining
Li Zhiyong, Zhu Di
2006, 32(01): 103-107.
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ECM(electrochemical machining) is one of the main machining methods of the aero-engine blades production. However, the tool cathode design is very difficult, which limits the applications of ECM in modern industries. To solve the difficulties in automation of the tool cathode design of aero-engine b...
Parameter design for power train and simulation of dynamic performance of electrical vehicles
Ji Fenzhu, Gao Feng, Wu Zhixin
2006, 32(01): 108-111.
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The method and principle of parameters design for electromotor, the ratio of power train and batteries' capacity of electric vehicles(EVS) were explored and discussed. Based on some types of EVS, the parameters of power train of EVS were selected and designed reasonably. A performance simulation mod...
Operational availability demonstration of military airplane based on simulation
Jiao Jian, Wang Zili
2006, 32(01): 112-116.
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Operational availability (AO) is an important top parameter of military airplane RMS(reliability, maintainability and supportability). In order to obtain reasonable and valid AO, based on characters of demonstration stage, a simulation model using Monte-Carlo method and queue theory was constructed ...
Quantitative assessment approach of RET based on interference model
Yao Jun, Cao Xinkuan, Jiang Tongmin
2006, 32(01): 117-120.
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RET(reliability enhancement testing) is the most advanced technology in western countries. RET’s concept, process and stress limit classification were introduced. The basic theory of RET was explained. Interference model was introduced into RET, to settle the problem that RET couldn’t be analyzed qu...
Reliability of space flexible mechanisms
Zhang Jianguo, Su Duo
2006, 32(01): 121-124.
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The dynamics differential equations of flexible kinetic mechanisms were established on the basis of using the floating coordinate system and mode flexibility according to the kinetic reliability characters of the flexible bodies on space applications. The integral and iteration algorithm was applied...

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