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2006 Vol. 32, No. 08

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Fast star tracking technology in star sensor
Jiang Jie, Li Xiao, Zhang Guangjun, Wei Xinguo
2006, 32(08): 877-880.
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Abstract:
Tracking model is one of main models, when star sensor works. Speediness of tracking process affects star sensor′s performance. A fast star tracking algorithm was proposed. Three methods, such as star catalog partition, threshold mapping, sorting and matching, were designed for three time-consuming ...
Application of quaternion in ejection seat performance simulation
Feng Wenchun, Lin Guiping
2006, 32(08): 881-884.
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Abstract:
A new method of combined quaternion and Euler angle was proposed to solve the singularity problem of Euler angle velocity equation at large extent attitude movement and all-attitude angles and jumping problems for the limitary of attitude angle using quaternion method in ejection seat performance si...
Attitude estimation method for flight vehicles based on computer vision
Zhao Shifeng, Zhang Hai, Fan Yaozu
2006, 32(08): 885-888.
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Abstract:
An attitude estimation method for flight vehicles based on statistic of image was improved. The method improved reduces calculation, and improves the real-time performance for attitude estimation. The bank and the pitch angle can be estimated rapidly with a higher robusticity. Its accuracy satisfies...
Autonomous orbit determination of spacecraft based on UKF using radar altimeter
Liu Jun, Han Chao
2006, 32(08): 889-893.
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Abstract:
The existing problem in using the extended Kalman filter(EKF) to estimate the state of one nonlinear system was discussed. And the unscented Kalman filter(UKF) was introduced, which is widely used today. The radar altimeter as a new measure instrument was introduced in the satellite orbit navigation...
Steady state modeling of loop heat pipes and operating characteristics analysis
Bai Lizhan, Lin Guiping, Zhang Hongxing
2006, 32(08): 894-898.
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Abstract:
Based on energy balance, pressure balance, mass conservation and geometric constraint, the steady state model of loop heat pipes was established and solved. The modeling results not only confirms the steady state operating characteristics of loop heat pipes introduced in many literatures, but also b...
Reliability analysis on structure with multiple site damage
Wang Chuansheng, Zhang Jianyu, Bao Rui, Fei Binjun
2006, 32(08): 899-902.
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Abstract:
A quantitative analysis method on the occurrence probability of MSD(multiple site damage)was presented based on the theory of statistics in fatigue and fracture mechanics and the existing experimental results. It predigested the calculation for the occurrence probability of MSD and provided referenc...
Reliability lifetime analysis of the turbine blade of turbofan engine
Wang Dawei, Miao Xuewen, Hong Jie
2006, 32(08): 903-907.
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Abstract:
The loading spectrum is the foundation on which the life analysis of the aeroengine structure is discussed. The life usage consumption of turbine operating blade of some typical missile turbofan engine was predicted by working data processing. The life consumption models was established on which the...
Chaos-simplex-based hybrid algorithm to collaborative optimization of aircraft design
Zhou Shengqiang, Xiang Jinwu
2006, 32(08): 908-911.
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Abstract:
Corresponding to computational difficulties encountered in the applications of CO(collaborative optimization), existing solutions were concluded. With transformed the system level optimization to unconstrained optimization problem, intelligence optimization algorithms should be chosen, but the compu...
Improving the atomic oxygen resistance of epoxy resin using organosilicon
Wang Xin, Zhao Xiaohu, Shen Zhigang
2006, 32(08): 912-916.
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Abstract:
To improve the atomic oxygen(AO) erosion resistance of resin matrix materials applied to spacecrafts, γ-Glycidoxypropyltrimethoxy silane was filledin the epoxy resin with a direct-mixing method and then the AO exposure experiments were carried out. After the AO exposure, a three-dimension network st...
Trajectories to the far side of the sun via gravity assists
Ma Wenzhen, Zheng Jianhua, Gao Changsheng
2006, 32(08): 917-921.
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Abstract:
The interplanetary trajectories to the high latitude of the sun via gravity assists of inner planets were analyzed to reduce the energy cost of the space mission. Based on the patched-conic theory, the energy contour maps, which were used to search for the appropriate launch opportunities of multipl...
Heat transfer measurements on a rotating disk with discrete receiver holes
Luo Xiang, Xu Guoqiang, Tao Zhi, Ding Shuiting
2006, 32(08): 922-925.
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Abstract:
Modern gas turbines are cooled using air diverted from the compressor. In a rotor stator system, the cooling air enters at the center of stator and flows radially outward, then leaves through the discrete receiver holes in the rotor and clearance between rotor and shroud. The rotor with 440mm diame...
Computational intelligence technology for optimal design of grid-stiffened composite structure
Rong Xiaomin, Xu Yuanming, Wu Decai
2006, 32(08): 926-929.
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Abstract:
To overcome the difficulties of optimal design for grid-stiffened composite structures, such as multi-variables, multi-constraints, mixed discrete-continuous design variables, highly nonlinear, etc, the application of computational intelligence(CI), namely evolutionary neural networks(ENN) was consi...
Analysis of precision for maximum likelihood estimation in the Weibull distribution
Li Jin, Huang Min
2006, 32(08): 930-932.
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Abstract:
Maximum likelihood estimation(MLE) in the Weibull distribution of parameters is considered an effective method, which is recommended in the case that the number of failure is more than 10 or equal 10. In practice, the number of failure is often less than 10 because of the high reliability or the few...
Genetic algorithm approach to the jammer′s layout for EW
Gao Bin, Lü Shanwei, Guo Qingfeng, Zhang Na
2006, 32(08): 933-936.
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Abstract:
The assignment problem of jamming resource for electronic warfare(ECM) plays a key role in utilizing jammer sufficiently and obtaining the optimal jamming effect. According to characteristics of modern electronic warfare(EW), the calculation formula of jammer′s avoidance ratio was investigated by us...
Infrared image sequence processing based on singular value decomposition
Guo Xingwang, Gao Gongchen
2006, 32(08): 937-940.
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Abstract:
The raw thermal images acquired in infrared thermographic nondestructive testing(IT NDT) usually have low signal-to-noise ratio(SNR) and temperature contrast. In order to restrain the bad effects of noise, singular value decomposition(SVD) technique was used in infrared image sequence processing to ...
Dynamic compensator control strategy of hydraulic parallel manipulator
Yuan Lipeng, Dong Yanliang, Zhao Keding, Xu Hongguang
2006, 32(08): 941-945.
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Abstract:
The prototype of a hydraulic driven 6-DOF parallel manipulator used in fly model simulator was presented. Considering on the mathematical model of the system which has many uncertain effect factors such as disturbed force, friction force and uncertain parameter, the research on the closed loop dynam...
TOA data process method for improving the position location accuracy in NLOS environment
Chang Rong, Zhang Jianglin
2006, 32(08): 946-949.
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Abstract:
Based on the statistical property of the non-line of sight(NLOS) propagation in the mobile communication environment, a data process method was presented to improve the position location accuracy of the time-of-arrival(TOA). All of the measured TOA data were analysed, and the data which were apparen...
Measurement arithmetic based on linear interpolation and equivalent transducer in aircraft fuel quantity gaging
Ouyang Pingchao, Liu Hongmei, Jiao Zongxia
2006, 32(08): 950-953.
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Abstract:
A measurement arithmetic based on virtual equivalent sensor and linear interpolation was presented, which was applied to aircraft fuel quantity gaging. The aircraft fuel surface which was defined by more than three fuel sensor′s measurement value could be also expressed with one virtual equivalent s...
Image target distinguish based on Gabor filters
Zeng Shuyan, Zhang Guangjun, Li Xiuzhi
2006, 32(08): 954-957.
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Abstract:
In order to provide useful information for mobile robot, the target distinguish approach based on image matching needs to recognize image pattern. 2D Gabor filters were created by Gabor transform, which had excellent performance and didn′t need to segmente images catched by the single CCD camera. Ga...
Effect caused by coating adhesive on polarization-maintaining fiber coil
Meng Zhaokui, Shao Hongfeng, Xu Hongjie, Zhang Chunxi
2006, 32(08): 958-961.
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The action and effect on the two important performance parameters such as temperature and vibration of the fiber ring and fiber optical gyroscope(FOG) were expatiated. In allusion to the factual conditions of the FOG of some item, all aspects of experiments were done and the experiment results were ...
Moving-mass attitude control system for spinning vehicles based on neural networks
Wang Songyan, Yang Ming, Wang Zicai
2006, 32(08): 962-965.
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Abstract:
The ability of a moving-mass attitude control system to control a spinning vehicle was investigated. The general nonlinear equations of motion with n internal moving elements were provided. The coupling influence to the system caused by the relative movement of the moving masses to the vehicle shell...
60Co radiation effects and photobleaching properties of polarization-maintaining fiber in fiber optic gyroscopes
Xiao Wen, Zhang Yuyan, Liu Dewen
2006, 32(08): 966-968.
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Abstract:
For the space application of the interference fiber optic gyroscope(IFOGs), the experiments were made on the PM fiber coil by 60Co radiation source at different dose rate. Radiation effects of it were got from the experiments. And photobleaching experiments were made on the polarization maintain(PM)...
Suitability of some ductile fracture criteria and yield criteria in forming limit prediction
Chen Jieshi, Zhou Xianbin
2006, 32(08): 969-973.
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Abstract:
Some ductile fracture criteria was applied to predict the forming limit of sheet matels. The numerical simulation for deformation processes with uniaxil tensile, plane strain, equi-biaxial strain and some other strain paths were carried out for HS steel, IF steel and 6111-T4 aluminum alloy sheets. D...
ARL computation and parameters optimization for MEWMA control chart based on the Markov chain
Du Fuzhou, Tang Xiaoqing, Sun Jing
2006, 32(08): 974-978.
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Abstract:
Average run length(ARL) is one of the important indices in performance evaluation on quality control charts, the research on which will set up the foundation of quality control chart parameters optimization, performance evaluation and application. An ARL computation model based on the Markov chain w...
The technique of sub-pixel stripes distinguish on the surface measurement
Chen Shiping, Bi Ya, Li Xiao, Zhou Xianbin
2006, 32(08): 979-982.
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Abstract:
Non-contact measurement of 3-D surface has been extensively applied in industry. The stereo vision is an effective way for 3-D profile measurement.Distinguishing and detecting the high density white-black stripes is one of the key techniques in the 3D-measurement based on the image of grating. Using...
Effect of aqueous phase condition on the strength increasing of cement stabilized soil
Ning Jianguo, Huang Xin, Xu Sheng
2006, 32(08): 983-987.
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The strength increment of stabilized soil generated by unit cement content would remarkably increase after cement content reached to a certain amount, and at same cement content there existed obviously strength difference between the stabilized soil samples formated from different soil samples with ...
Mechanism and forward kinematic analysis for cable-driven humanoid-arm manipulator
Chen Quanzhu, Chen Weihai, Zhang Jianbin
2006, 32(08): 988-991.
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In order to overcome the influence of bad load-bearing capacity and the movement flexibility by the actuators installed on the humanoid-arm, a series-parallel mechanism based on the latest theories of humanoid-arm bionics and research results of the parallel robots was proposed. The shoulder and wri...
Key algorithm in content-based publish/subscribe system based on subscription partitioning
Lu Peng, Liu Xudong, Lin Xuelian, Wang Bin
2006, 32(08): 992-997.
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Abstract:
Partitioning subscriptions interest among multi-brokers acts as an important way to resolve load balancing problem in content-based publish/subscribesystem. A new method of event space-based subscription partition with K-D tree was proposed. With this method, the event space was partitioned into zon...
P2P worm detection based on traffic classification and application identification
Xia Chunhe, Shi Yunping, Li Xiaojian
2006, 32(08): 998-1002.
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Abstract:
P2P worm exploits common vulnerabilities in Peer-to-Peer networks. It is a severe security threat. A P2P worm detection method was presented, which called P2P worm detection(PWD) based on the worm′s propagation characteristics. PWD consists of a preprocess procedure which is based on application ide...

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