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2005 Vol. 31, No. 03

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Trajectory control logic of space exploration rocket required to arrive given site with zero speed at given time
Dong Yunfeng, Xiao Yelun
2005, 31(03): 265-269.
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The special space exploration rocket is launched to rendezvous with the celestial body flying around earth, the absolute velocity of rocket should be zero at rendezvous time in order to satisfy the observe requirement. The ideal rendezvous orbit was designed before launch based on the orbit of the c...
Hypersonic aerothermoelastic analysis of wings
Wu Zhigang, Hui Junpeng, Yang Chao
2005, 31(03): 270-273.
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A hierarchical solution process for thermal flutter analysis is presented to dealing with the aero-thermo-elastic dynamic problems of hypersonic wings. Firstly, the natural dynamic characteristics of structures under thermal circumstances were analyzed. And then the hypersonic unsteady aerodynamics ...
Error matching principle for heat transfer calculations in hypersonic flow simulations
Xie Jinrui, Wu Songping, Wang Hao
2005, 31(03): 274-277.
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An error matching principle, which is base on the error analysis of the computations with high-aspect-ratio grids, is derived for the finite difference simulation of the viscous boundary layer flows. The high- aspect-ratio grids were commonly used in numerical simulations of the viscous boundary lay...
Study and application of aircraft configuration management
Yu Yong, Fan Yuqing
2005, 31(03): 278-283.
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To meet the complication, diversification and serialization of modern aircraft, and to guarantee the consistency, integrity and trackability of product data during the process of aircraft digital design and manufacturing, the process of aircraft configuration management and control were studied. The...
Research on the production of the navigation data of high dynamic GPS signal simulator
Zhang Bochuan, Chang Qing, Zhang Qishan, Kou Yanhong
2005, 31(03): 284-287.
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For the purpose of testing the performance of GPS(global positioning system) receivers, a GPS signal simulator is needed that can emulate the real GPS signals under all kinds of conditions. The high dynamic multi-channel GPS signal simulator device consists of hardware, computer and software. The so...
Shaking table test on ship lifts model with roof MR damper isolation system
Lü Mingyun, Mingyun Wu, Qu Weilian
2005, 31(03): 288-292.
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The sudden stiffness change on the top of tube towers of ship lifts caused the intensive seismic whipping effect to the top machinery building. To suppress the whipping effect, a roof MRD (magnetorhelogical damper) isolation system were presented. The structure model of ship lifts and MRD isolation ...
Development of a reaction-diffusion model for erosion and identification of the associated diffusion coefficient
Wang Hengyu, Lee Chunhian
2005, 31(03): 293-297.
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It was proposed that the adsorption (including both physical and chemical) was the principal mechanism for AO(atomic oxygen) in LEO(low earth orbit) interactingwith surface materials. The remaining secondary physical or chemical mechanisms could be included into the principal mechanism. The reaction...
Extended role-based access control model
Xue Wei, Huai Jinpeng
2005, 31(03): 298-302.
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An extended RBAC(role based access control) model, RTBAC (role & task based access control) model was presented. The model introduced the notions of task and task instance into RBAC96 model, formally defined the hierarchies of tasks and task instances, specified the relationships between traditi...
Analysis of effects of low Reynold’s number on small turbofan engine
Tang Hailong, Zhu Zhili, Luo Anyang, Zeng Yuanjiang
2005, 31(03): 303-306.
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Problem caused by low Reynold’s number is one of main factors affect performance of high altitude endurance unmaned vehicle engines. Effects of low Reynold’s number on a small high bypass turbofan engine were discussed.The effects can make the performance of the engine’s components change when Reyno...
Analysis of stress in winding fiber-optic ring
Meng Zhaokui, Zhang Chunxi, Yang Yuanhong, Xu Yonggang
2005, 31(03): 307-310.
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Some opinions to coiling the optic fiber ring were expatiated from two facets that quadrupole symmetry winding method and stress control which was emphasis and nodus during winding. These views were concluded from the practical winding experiments, and it should be useful to improve the winding qual...
All-sky autonomous star map identification algorithm based on Delaunay triangulation cutting algorithm
Fang Jiancheng, Quan Wei, Meng Xiaohong
2005, 31(03): 311-315.
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In the field of geophysical model building,Delaunay triangulation cutting algorithm has been widely used because of having a very important characteristic which is the result of this triangulation cutting method being unique in a specifically set of points.This character was adopted, the algorithm t...
Application of algorithm of intersection between lines and random curves in calculating grain size
Yu Yang, Liu Erli, Zhou Tietao, Liu Peiying
2005, 31(03): 316-320.
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The feasibility of computerization problem of grain size measuration was discussed from the viewpoint of Material Science. The average diameter method was adopted to compute the grain size for an image processed about grain-edge. Based on the Freeman code principle, the differences between the metho...
Novel image denoising algorithm based on bispectral reconstruction
Jiang Hong, Wu Lijiang
2005, 31(03): 321-325.
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A novel image denoising algorithm based on the bi-spectral reconstruction was proposed. The basic idea of this new algorithm was:higher order statistics was not sensitive to the Gaussian noise. First of all, this new algorithm would calculate the higher order spectrum of the image, and theoretically...
Path planning for astronaut translation by means of continuous handrails during extravehicular activity
Yang Feng, Ding Li, Yang Chunxin, Yuan Xiugan
2005, 31(03): 326-330.
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It is usually requested that astronauts move from one worksite to another during the extravehicular activity. An efficient and robust technique for generating global motion path for moving astronauts in the working environment utilizing heuristic search algorithm, A* algorithm, was proposed. Initial...
Closed-loop system of silicon resonant pressure micro-sensor
Li Haijuan, Zhou Haomin
2005, 31(03): 331-335.
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When the silicon resonant pressure micro-sensor works in the self-oscillation close-loop system with thermal-excited and resistor detected, its output has a problem of dreadfully weak signal of micro-sensor. SNR( signal noise ratio) is as low as 10-3, for the system used frequency-equaled signal to ...
Framework design of embedded software testing development environment
Zhang Liang, Liu Bin, Lu Minyan
2005, 31(03): 336-340.
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By adopting the idea of software design reuse, framework design for an embedded software simulation testing environment can offer an efficient solution to construct testing environment without largely changing the architecture of testing environment when testing different embedded software, and henc...
Embedded ARM processor FPGA technology in star sensor
Yin Na, Jiang Jie, Zhang Guangjun
2005, 31(03): 341-345.
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An ARM(advanced RISC machine)embedded FPGA(field programmable gate arrays)chip - EPXA10 was introduced. A research of image acquisition and star position locating based on this technology were done and the accomplishment was achieved. The driving of the CMOS(complementary metal-oxide-semiconductor t...
Structural synthesis method for 4-degrees-of-freedom symmetrical parallel manipulators
Fang Hairong, Fang Yuefa, Guo Sheng
2005, 31(03): 346-350.
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Based on screw theory, the relationship between motion screw system of limbs and constraint screw system of moving platform were analyzed. All possible 5-order motion screw systems of limbs’ structures were enumerated, and then a systematic method was presented for structural synthesis of 4-DOF (4-d...
Numerical simulation of space debris hypervelocity impact using SPH method
Yan Xiaojun, Zhang Yuzhu, Nie Jingxu
2005, 31(03): 351-354.
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The SPH(smoothed particle hydrodynamics) was applied to simulate the problems in Whipple structure hypervelocity impact. In modeling the structure, the SPH and FEM(finite element method) discretizations were used simultaneously to reduce the CPU time, and this was very convenient and advantageous in...
Influence of linear leaf springs’ hysteresis behavior on vehicle’s ride
Ding Nenggen, Pan Weimin, Liu Zhuqing
2005, 31(03): 355-358.
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A method was investigated to select proper damping coefficients of the damper used for the leaf spring suspension, based on the analysis of the influence of leaf springs' hesteresis behavior on vehicle’s riding on different kinds of roads. Based on a quarter vehicle model, the root of mean squared a...
Setup and application of a wetting property measuring instrument
Zhang Zuoguang, Chen Liang, Li Min, Sun Zhijie
2005, 31(03): 359-362.
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A new wettablity instrument was developed according to the fabrication characteristic of composites, which could measure the mass increase in fibres penetrated by resins. The instrument was composed of two parts. One was the wicking mass testing system and the other was a temperature-controlled syst...
Explanation of reduced order controller for a class of H∞ singular control problem
Zhong Ruilin, Cheng Peng
2005, 31(03): 363-366.
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The structure character of system transfer matrices can be used to solve a class of singular H∞ control problem and a reduced order H∞ controller can be constructed in explicit form either by linear matrix inequations method or two algebra Riccati equation method. The order of the system H∞ controll...
On convergence of formula for forward problem in brain physics
Chen Guo, Li Jing, Wei Chen, Lü Junfang
2005, 31(03): 367-371.
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In brain physics, the forward problem is the process of predicting scalp potentials distribution from known brain electrical source. The convergence of a forward problem algorithm was analyzed and proved through mathematic method for the first time. This formula calculated the scalp potentials distr...
Dynamical modeling and simulation of satellite thermal control system
Li Yunze, Wei Chuanfeng, Yuan Lingshuang, Wang Jun
2005, 31(03): 372-374.
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Modeling and simulation of controlled-object temperature changes are necessary for developing satellite thermal control system. In order to calculate the dynamical properties of satellite thermal control system more easily, the whole satellite was divided into five lumped thermal control nodes, whic...

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