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2007 Vol. 33, No. 07

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Orbital maintenance and control of spacecraft fly-around with finite-thrust
Shi Peng, Li Baojun, Zhao Yushan
2007, 33(07): 757-760.
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Based on the linear dynamics model, the relevant issues of orbital maintenance and control of spacecraft fly-around with finite-thrust was studied. Firstly, aimed at the problem of orbital control of spacecraft fly-around, the exact dynamics model was derived and the linear dynamics equation was pre...
Adaptive fuzzy sliding mode attitude control for large angle slew maneuvering of flexible satellite
Chen Yu, Dong Chaoyang, Wang Qing, Zhang Minglian
2007, 33(07): 761-764.
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An adaptive fuzzy sliding mode control was proposed for the attitude stabilization of flexible satellite during large angle slew maneuvering. The dynamic model of the satellite with flexible appendages was derived by Lagrange equation. The sliding mode control was designed to make the state of syste...
Simulation and analysis of pilots′ manipulation based on SimMechanics
Wang Rui, Zhuang Damin
2007, 33(07): 765-768.
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According to human dimensions of chinese male pilot and the chinese manhood anthropometric data, the rigid model for the pilot′s upper limbs was established. Referring to the requirement about cabin layout in GJB and flight quality criterion in HB, Two operation movements of the pilot, pulling and p...
Moving-mass attitude control law based on genetic algorithm
Qin Li, Yang Ming, Guo Qing
2007, 33(07): 769-772.
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The ability of the moving-mass attitude control system was investigated to control a vehicle with three-axial stabilization in intra-atmospheric space. And the general nonlinear motion equations with three internal moving masses were provided. For the fast self-learning and adaptive capacities of ra...
Mixing enhancement in round jet exhaust using pulsed blowing: 3-D numerical simulations
Li Jiajun, Eriqitai
2007, 33(07): 773-776.
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The 3-D flow fields of the round jets with pulsed jet blowing for mixing enhancement were simulated numerically. This work uses a technique for injecting high frequency and high intensity signals into subsonic shear layers for the purpose of jet mixing enhancement. The finite volume method, RNG k-ε ...
Second generation wavelet packet construction and aircraft engine weak damage identification
Jiang Hongkai, Wang Zhongsheng
2007, 33(07): 777-780.
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To identify weak damage of aircraft engine rolling bearing, a new method to construct second generation wavelet packet was presented. In this method, the decomposition and reconstruction procedures of second generation packet were designed, and the second generation packet operators which lock on to...
Aerodynamic characteristic analysis of high-aspect ratio elastic wing
Ma Tielin, Ma Dongli, Zhang Hua
2007, 33(07): 781-784.
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The aerodynamic performance and flying safety of long-endurance unmanned aerial vehicle (UAV) are largely affected by the aeroelastic distortion of its high-aspect ratio wing. High-aspect ratio wing of UAV is bended and twisted by the air load during flight and couldn-t be treated as a traditional r...
Discrete ray path tracing on aircraft
Wang Bingqie, Su Donglin, Zhang Xiaolei
2007, 33(07): 785-788.
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A novel diffraction ray tracing method on convex surfaces of electronic warfare special aircraft was investigated. Quickly-3D-model of aircraft was carried out, and surface grids were meshed on the model to provide surface discrete grids data. Enough points can be achieved by minutely modeling or in...
Numerical simulation of converging-diverging nozzle flow in pulse detonation rocket engine
Li Qiang, Fan Wei, Yan Chuanjun
2007, 33(07): 789-792.
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Exhaust nozzle is one of the key components of pulse detonation rocket engine (PDRE). Exhaust nozzle can be used to improve the propulsion performance of PDRE. Method of characteristic (MOC) was used to calculate one-dimensional CJ(Chapman-Jouguet)detonation wave propagating in the ideal detonation ...
Analytical model of aeroelastic stability of hingeless rotor blade with composite flexures
Shi Qinghua, Xiang Jinwu
2007, 33(07): 793-797.
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An analytical model for predicting the aeroelastic behavior of hingeless rotor blade with arbitrary section was presented, and the effect of composite flexures on aeroelastic stability was investigated. The analysis of rotor blade was simplified as a line sectional properties analysis and a nonlinea...
UT-BLUE filter for target tracking
Wang Wei, Dai Mingqiang, Zhang Zhihua
2007, 33(07): 798-802.
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In tracking maneuvering targets application with radar, target dynamics are usually modeled in the Cartesian coordinates. In the cases target motion model are always very accurate but nonlinear ,while target measurements are directly available in the original sensor coordinates. By means of combinat...
Fast focused imaging algorithm for circular scanning SAR
Sun Bing, Zhou Yinqing, Li Tianchi, Guo Caihong
2007, 33(07): 803-806.
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Image formation for circular scanning synthetic aperture radar (CS-SAR) was investigated. The work principle and echo signal model of CS-SAR were described. A focused image algorithm based on spectrum analysis was presented. This focused algorithm was able to correct the range cell migration within ...
Design intelligent carrier tracking loop based on software GPS receiver
Tang Bin, Yu Xiaqiong, Dong Xurong, Zhao Xinshu
2007, 33(07): 807-810.
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Minimal invasive surgery assisted robot was developed in Robotics Institute in Beijing University of Aeronautics and Astronautics. Based on the requirement of neurological stereotactic surgery, dexterity of the robot was analyzed. Using concept of service sphere and service section, definition of de...
Zenith blind zone of two-axis stabilized platform
Dong Xiaomeng, Zhang Ping
2007, 33(07): 811-815.
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Zenith blind zone is a phenomenon which the line of sight can not track the target when the target maneuvers in the narrow offboresight of the missile. Utilizing the geometrical relation of photoelectric imaging guidance, the rectangular coordinates and polar coordinates stabilized platform were ana...
Robust H∞ control for systems with delayed state and input
Xia Hongwei, Ling Mingxiang, Wen Qiyong, Wang Changhong
2007, 33(07): 816-820.
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The problem of robust H∞ state feedback controller design for the generalized continuous time systems with time-varying delays in states and control inputs and parameter uncertainties residing in a polytope were investigated. A new improved performance criterion for the existence of robust H∞ contro...
Multicast routing algorithms with low tree cost for LEO satellite networks
Cheng Lianzhen, Zhang Jun, Liu Kai
2007, 33(07): 821-825.
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To resolve the channel resources waste problem of the typical source-based multicast routing algorithm in low earth orbit (LEO) satellite networks, a new core-based shared tree algorithm called the core-cluster combination shared tree (CCST) algorithm and its improved one (i.e. w-CCST algorithm) wer...
Optimization of loading trajectory for skin stretch forming process
Zhang Yanmin, Zhou Xianbin
2007, 33(07): 826-829.
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Loading trajectory is the key factor in skin stretch forming. First the loading trajectory of double curve skin was designed through the analytic method, then the parameters were changed to the machine-s instructions which were used as design variables. The method of combining finite element analysi...
Multi sheet hydroforming of complicated thin wall part and numerical simulation
Li Tao, Lang Lihui, An Dongyang, Wang Ling
2007, 33(07): 830-833.
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Sheet hydroforming has proven to be an effective method for manufacturing complicated parts. The multi-sheet hydroforming technology of complicated thin wall aerocraft part was investigated. Effects of key process parameters including the shape of pre-forming punch,corresponding pre-forming depth,an...
Analysis of multiple-impact forces between flexible-rods
Tian Ali, Yin Xiaochun
2007, 33(07): 834-837.
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The multiple-impact phenomena usually exist in many engineering structural system and the calculation of impact force is a key problem. The present study is aimed at the calculation method of the impact force of the longitudinal multiple-impact problem. The transient wave response approach was prese...
Design and analysis of a rover mechanism based on the metamorphic principle
Zhang Ketao, Fang Yuefa, Fang Hairong
2007, 33(07): 838-841.
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A kind of special six-bar spherical metamorphic mechanism was proposed. The configuration transformation was analyzed, and the adjacency matrixes under various metamorphic mechanisms were put forward. According to the mechanism characteristic at its different configuration, the metamorphic mechanism...
Techniques of machining feature mapping from design-by-feature model
Yu Fangfang, Zheng Guolei, Ren Wenjie, Du Baorui
2007, 33(07): 842-845.
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To pick up the machined area automatically in numerical control programming, a new methodology for recognizing machining features from a design feature model was presented based on the study about the product modeling method in the design-by-feature systems, product information models (geometric and...
Processing and microstructure of Al2O3/YAG eutectic ceramic by laser rapid remelting
Su Haijun, Zhang Jun, Liu Lin, Fu Hengzhi
2007, 33(07): 846-850.
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Laser rapid remelting experiments were conducted on the preparation of Al2O3/YAG eutectic ceramic in-situ composite to investigate the microstructure characteristic and growth behavior under an ultra-high temperature gradient and different laser scanning rates of 0.01~2.0mm/s, and to explore the re...
Impact energy absorption and dynamic viscoelasticity of composites
He Chenghong, Zhang Zuoguang, Li Yubin, Sun Zhijie
2007, 33(07): 851-855.
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The energy absorptions of composite laminates reinforced respectively by glass fiber, carbon fiber, aramid fiber, and UHMWPE fiber (separately named as GFRP, CFRP, AFRP and DFRP), were investigated under the low velocity impact. The load sensibilities on dynamic viscoelasticity of composite fiber bu...
PZT nanoparticles synthesized by sol-hydrothermal method and properties
Lin Haibo, Liu Haitao, Wang Fuchi, Cao Maosheng
2007, 33(07): 856-859.
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PZT nanopowders were fabricated at low temperature by modified sol-hydrothermal method, and the effects of the sintering parameter such as sintering temperature, keeping time on the density, grain size, piezoelectric and dielectric properties of the PZT ceramic were investigated. The results show th...
Method for simulating mechanical behavior of syntactic foam plastics by artificial neural networks
Zou Bo, Lu Zixing
2007, 33(07): 860-864.
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Application of artificial neural networks (ANN) method on the mechanical behavior simulation of syntactic foam plastics was discussed. Firstly, factors influencing on the mechanical behavior and mechanical properties simulated and predicted were separately taken as input and output quantities. Secon...
Low oxygen partial pressure self-fusing Al-Si coating formed on surface of Ti alloy and its oxidation resistance
Zhou Wei, Zhao Yuguang
2007, 33(07): 865-868.
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An Al-Si fusing coating was successfully produced by means of the low oxygen partial pressure high-temperature fusing technique for the improvement of the high-temperature oxidation resistance of Ti-6Al-4V alloy. Unlike the Si-modified aluminide coating, this technique is much effective and cheap wi...
Effects on residual stresses of Ti6Al4V electron beam welding line by laser shock processing
Lu Jinzhong, Zhang Yongkang, Qian Xiaoming, Ren Xudong
2007, 33(07): 869-872.
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Laser shock processing radiates metals by high power density (GW/cm2), short pulse (ns level) laser beam to produce the high strength impact wave and become residual stress of several hundreds MPa. Moreover, Laser shock processing has been shown to harden the surface and improve the mechanical prope...

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