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2007 Vol. 33, No. 08

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Scan mirror motion compensation of geostationary satellite
Jia Yinghong, Xu Shijie
2007, 33(08): 873-877.
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The problem of mirror motion compensation was studied for a geostationary satellite to eliminate the optical axis direction deviation due to attitude deviation and normal line deviation of the mirror. The rotational dynamical equation of a spacecraft with two-degree freedom scan mirror was presented...
Stator setting angles adjustment on performance improvement of axial-centrifugal compressor
Cao Zhipeng, Liu Bo, Ding Wei
2007, 33(08): 878-881.
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The quasi-three dimensional flow fields of axial-centrifugal compressor were solved with the streamline curvature method. Calculating stations were set in the leading edge, trailing edge and the middle of blade row. The streamline locations were fitted by cubic spline curves at each iteration comput...
Curvilinear synthetic aperture radar iterative algorithm
Tang Zhi, Li Jingwen, Wang Baofa
2007, 33(08): 882-885.
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Curvilinear SAR (synthetic aperture radar) 2-D signal model and 3-D signal model were studied. The curvilinear SAR echo signal mathematic equation was derived. Iterative algorithm was applied to curvilinear SAR. According to minimum non-linear variance criteria, RELAX algorithm cost function in curv...
Localization for mobile node based on sequential Monte Carlo
Lü Ke, Zhang Jun, Wang Gang, Ma Lin
2007, 33(08): 886-889.
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Abstract:
The accuracy and frequency of localization in wireless sensor networks play a crucial role in tracking and monitoring. Therefore, the study of high-efficient localization algorithm for accurate tracking is necessary. Through analyzing the traditional positioning based on Bayesian estimate process, t...
New method of moving target detection using single-channel SAR ATI
Gao Fei, Sun Jinping, Yuan Yunneng, Bai Xia
2007, 33(08): 890-893.
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A detector for slow GMTI (ground moving target indication) with a single channel SAR (synthetic aperture radar) multi-look ATI (along track interferometry) was investigated. The steps include constructing multi-look using overlapped or unoverlapped windows, respective imaging, phase compensation and...
Nonsubsampled Contourlet speckle reduction algorithm for SAR images
Guo Xujing, Wang Zulin
2007, 33(08): 894-897.
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The nonsubsampled Contourlet(NSCT) not only overcomes the disadvantage of wavelet, the nonoptimal basis for one-dimensional singularity, but also improves the edge preservation for the shift-invariance. Therefore, a speckle reduction model based on NSCT was presented. Firstly, original image with mu...
Aperture-dependent motion compensation for airborne SAR with 0.1 m resolution
Bai Xia, Sun Jinping, Gao Fei
2007, 33(08): 898-901.
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Abstract:
A new technological problem in 0.1 m resolution airborne SAR(synthetic aperture radar) motion compensation design procedure was discussed. High azimuth resolution means large synthetic aperture length and wide integration angle, thereby echo data collected in stripmap mode might include remarkable r...
Position and azimuth determination for land vehicles using electro-optical detection system
Wang Wei, Wang Dan, Feng Peide
2007, 33(08): 902-905.
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Abstract:
For the increasingly higher requirements of land navigation systems for the modern military vehicles, such as mobile silos, command stations, scout vehicles and so on, a new approach of position and azimuth determination for land vehicles was presented utilizing the angle information to three known ...
Ontology-based simulation system lifecycle management system
Song Xiao, Gong Guanghong, Li Bohu
2007, 33(08): 906-910.
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Abstract:
Modeling and simulation(M&S) is a new and synthetic technology which has become the third means for recognizing and rebuilding the objective world besides the theory analysis and experiment research. Firstly, the concept of simulation system lifecycle management(SSLM) was proposed according to t...
LMI based multi-objective robust control electro-hydraulic servo loading system
Wang Yanshan, Li Yunhua, Wang Yiqun
2007, 33(08): 911-914.
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Abstract:
To improve the performance of the multi-channel electro-hydraulic servo loading system, a multi-objective robust control method based on LMI(linear matrix inequalities) was proposed. Several factors such as parameter uncertainties, strong couplings among different loading channels, and performance d...
Closed-loop optimal fuzzy reasoning and its application
Zhang Lei, Zhang Jing, Shen Gongzhang
2007, 33(08): 915-919.
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Abstract:
The basic idea of optimal fuzzy reasoning is introducing optimization mechanism into fuzzy reasoning, while traditional fuzzy reasoning is an open-loop and optimization process. Firstly two main characteristics of fuzzy reasoning methods, reasoning consistency and approximation, were discussed for a...
Fault tolerant architecture design of EHA
Ma Jiming, Fu Yongling
2007, 33(08): 920-924.
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Abstract:
The integrated EHA (electrical hydrostatic actuator) is an important component of the PBW (power by wire) flight control system. Fault tolerant architecture design is necessary to improve the whole reliability of flight control system. Performance parameters were offered by the demand of reliability...
Symbolic dynamics of coupled neuron model of calcium and voltage
Gao Zhiying, Lu Qishao
2007, 33(08): 925-929.
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Abstract:
The R15 neuron model with the intracellular calcium concentrations coupled to the transmembrane voltage was studied by the symbolic dynamics. The symbolic expressions of periodic and chaotic firing patterns were constructed through the first-return maps of ISIs (interspike interval series). And also...
Fault diagnosis technology of launch vehicle based on distributed expert system
Liu Chengrui, Zhang Qingzhen, Ren Zhang
2007, 33(08): 930-932.
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Abstract:
A distributed fault diagnosis system scheme for launch vehicle was presented based on distributed expert system because of the characteristic of the launch vehicle including many subsystems which coupled with each other. In knowledge acquisition, the scheme used the production rule representation an...
Extended Kalman filter method for micro-inertial strapdown attitude determination system
Shen Xiaorong, Zhang Hai, Fan Yaozu, Wu Guangyue
2007, 33(08): 933-935.
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Low precision micro-inertial gyros and accelerometers were used as elements of an inertial strapdown attitude system. Firstly, the nonlinear problem and the cause of accumulated error for inertial strapdown attitude solution were analyzed. Then according to the trigonometric function relationship be...
Method of eliminating synchronism control error in flash butt welding of bill
Lu Ning, Fu Yongling, Sun Xinxue, Chen Zhanhui
2007, 33(08): 936-939.
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Abstract:
Based on the characteristics and the demands of synchronization, a single nero forecast controller was presented,which was designed to eliminate synchronization error of upset force in flash butt welding. A press feedback loop was designed to solve the problem that it is uneasy to assemble force sen...
Characteristics analysis of dynamic model of 6-DOF Stewart platform
Guo Hongbo, Liu Yongguang, Li Hongren
2007, 33(08): 940-944.
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Abstract:
Based on the derived dynamic model of a six-degree-of-freedom (6-DOF) Stewart platform, some physical characteristics of the model were analyzed and proved in detail using matrix analysis method, which consist of the boundedness of the coefficient matrixes of dynamic model, the skew-symmetry of the ...
Ni-MH battery state-of-charge estimation based on Kalman filter
Wu Hongjie, Qi Bojin, Zheng Minxin, Liu Yongzhe
2007, 33(08): 945-948.
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Abstract:
The state-of-charge(SOC) is an important parameter for the electrical vehicle. A new Ni-MH battery nonlinear dynamic model in discrete-time state-space form was introduced. In the new model, SOC and state-of-polarization as states of the state vector were introduced to represent the dynamic behavior...
Motion planning for humanoid robot based on instability capacity
Peng Zhaoqin, Fu Yongling, Zhao Ke, Tang Zhiyong
2007, 33(08): 949-953.
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Abstract:
In order to ensure that the robot can work safely in human-s living environment, the most stable trajectory should be selected to finish the task. A new stability evaluating criterion which can be used to evaluate the stability of different walking patterns of the humanoid robot was proposed. The di...
Effects of PWB design factors on PTH reliability
Chen Ying, Huo Yujie, Xie Jingsong, Zhang Yuan
2007, 33(08): 954-958.
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Based on the barrel stress distribution model, the effect of printed wiring board(PWB) design factors such as plated through-hole(PTH) aspect ratio, the ratio of plating thickness over PTH radius, the ratio of board influence radius over PTH radius and glass transition temperature on PTH barrel stre...
Prediction method of monitoring displacement based on correlation coefficient stationary series with unequally spaced data
Ma Xiaobing
2007, 33(08): 959-962.
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Abstract:
An analysis method of unequally spaced correlation coefficient stationary series was established, which can be used into model buildings and prediction of displacement monitoring in geotechnical and hydraulic engineering. The integral maximum likelihood estimations of model parameters were derived f...
ICO multidisciplinary design optimization method
Han Minghong
2007, 33(08): 963-967.
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Some serious computational difficulties are found in application of collaborative optimization (CO). Reasons that cause computational difficulties in CO were analyzed. The L1 norm was used to improve subsystem consistency constraint and to avoid discontinuities in subsystem object function derivativ...
Reliability estimation of a multi-state system
Wu Yueqin, Zhou Hong, Guan Jiancheng
2007, 33(08): 968-971.
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Abstract:
Multi-state consecutive-k-out-of-n system is the model that is generalized form two-state consecutive-k-out-of-n system. The reliability estimation of multi-state consecutive-k-out-of-n system is a hot and difficult spot in the reliability engineering field. When both the system and its components h...
Modular production information system based on lean thinking
Meng Biao, Liu Zhicun, Fan Yuqing
2007, 33(08): 972-977.
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Abstract:
Many production organization obstacles must be overcome in manufacturing developing sometimes, and more, process reengineering will be promoted. This is always necessary along with the information system refining or evolvement constantly. Therefore, a production information system needs to meet the ...
Simulation for early precipitation process of Ni75Al4V21 alloy by microscopic phase-field model
Zhao Yuhong, Zhang Yue, Chen Zheng
2007, 33(08): 978-981.
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The microscopic phase-field kinetic model for ternary system was applied to investigate the precipitation process of γ′ and θ phase in Ni75Al4V21alloy. The evolution of atomic pictures was simulated, and the composition and long-range order parameters of θ (Ni3V) and γ′ (Ni3Al) were calculated. The ...
Experiment investigation of dynamic material property of aluminium alloy
Zhao Shougen, He Zhu, Yang Jialing, Cheng Wei
2007, 33(08): 982-985.
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Dynamic mechanical properties of four aluminum alloy were attained with the split Hopkinson pressure bar (SHPB) apparatus. According to the characters of the stress-strain curves, the Cowper-Symonds constitutive model was chosen and its relationship parameters were fitted according to the experiment...
Microstructure and affecting factors of epoxy resin cured by electron beam radiation
Li Yubin, Zhang Zuoguang, Sun Zhijie, Yang Jialing
2007, 33(08): 986-990.
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A scanning electron microscope (SEM) was used to observe the microstructures of cured samples after different cure time. The formation mechanism of microstructure was analyzed. The effects of molecular structure and molecular weight of epoxy resin, resin component, and radiation condition on the mic...
Effect of nuclear radiation on dielectric properties of wave-transmitting materials
Gong Zhaohe, Liu Jianhua
2007, 33(08): 991-993.
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The effect of nuclear radiation on dielectric properties of epoxy TDE-85/glass fiber E composite and bismaleimide 4501A/glass fiber D3W composite was studied in oxygen ambience using accelerated aging mothed. After samples were irradiated by 60Co -rays at a range of dose 50~800kGy in air, the diele...
Reflection based distributed interactive simulation framework
Huang Xiaodong, Li Bohu, Chai Xudong, Song Changfeng
2007, 33(08): 994-999.
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Adaptability is one of the most important qualities of the software frameworks, for which are used in various applications of a field. Reflection was introduced to improve the adaptability and support re-configuration of a modeling and simulation framework for the development of large scale simulati...
Decision support system based on 3-D cluster
Zhang Yongmei, Li Bo
2007, 33(08): 1000-1004.
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According to the requirement of the topography selection, the present spatial cluster technology and methods were studied deeply, a structural element was established. A new algorithm of 3-D spatial clustering based on mathematical morphology was presented. The process of spatial data mining was giv...

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