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2009 Vol. 35, No. 1

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Mixed-mode TRL algorithm based on symmetrical reflection standard
Wan Liang, Wu Jianhua, Miao Jungang, He Guoyu
2009, 35(1): 1-4.
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A mixed-mode through-reflect-line(TRL) calibration algorithm based on symmetrical reflection standard was proposed to accurately characterize coupled differential devices using scattering parameters. Using the transition structure’s generalized reciprocity and the phase relationship between its scat...
Low complexity sequence detection algorithm for time-frequency overlapped multiplexing system
Mo Yong, Wang Jing, Liu Dong, Li Daoben
2009, 35(1): 5-8.
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Overlapped hybrid-division multiplexing(OVHDM) can achieve high spectrum efficiency, and the performance is superior to multi-level modulation. The system model and the optimum detection were studied. The joint soft interference cancellation and sequence estimation algorithm, SIC-SE, was proposed to...
Processing system reliability model based on products reliability
Fu Guicui, Shangguan Yun, Shi Xingkuan, Liang Peidong
2009, 35(1): 9-12.
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In order to improve the product reliability, the relationships of processing system, process product deferent parameters, product performance and product reliability were analyzed. Then a reliability model named "reliability model of basic influence relationship in processing system" based on produc...
Key technology of deep web search
Chen Peng, Liu Liehong
2009, 35(1): 13-17.
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Deep web is web database accessed by the web search, it is different from surface web, so technology of traditional search engines is not applied to deep web research very well. Some key technology of deep web search was researched, including automatic discovery of deep web resource and ontology-bas...
Numerical investigation of heat transfer and flow resistance in U-shaped variable cross-section channels with different rib heights
Zhu Jianqin, Xu Guoqiang, Tao Zhi, Ding Shuiting
2009, 35(1): 18-22.
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The flow and temperature distribution in U-shaped variable cross-section channels with different rib heights was investigated numerically by a new developed three-dimensional Navier-Stokes code with low Reynolds number k-ε turbulence model. The rib pitch is 25 mm and the rib heights are 1 mm,1.5 mm,...
Filtering algorithm used for high dynamic GPS frequency estimation
Zhu Yunlong, Yang Dongkai, Liu Zhongkan
2009, 35(1): 23-27.
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Aiming at the drawbacks of the extended Kalman filter (EKF) which is the widely used GPS frequency estimation algorithm in high dynamic circumstance, a novel filtering algorithm called simplified unscented Gaussian particle filter (SUGPF) was proposed. The SUGPF is the combination of Kalman filter (...
Nonlinearity of temperature and scale factor modeling and compensating of FOG
Wang Xinlong, Ma Shan
2009, 35(1): 28-31.
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The error composite modeling and compensating of temperature effect and scale factor nonlinearity of fiber optic gyroscope(FOG) was studied. The mechanism of thermal affect arising from nonreciprocity of optic-loop was analyzed. Based on the severe nonlinearity drift error induced by temperature cha...
Design of trusted Java card code loading mechanism
Xu Yixi, Zhang Qishan, Liu Jianwei
2009, 35(1): 32-35.
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Based on the requirements of the trusted computing platform (TCP) program code management, a trusted code management framework was proposed. The Java card technique was the core of the framework. The code signature technique was adopted for the program loading authentication while the on-card securi...
Tensile and compressive mechanical properties of polyurethane foam plastics reinforced by glass fiber bundles
Lu Zixing, Zou Bo, Li Zhongming, Lu Ai
2009, 35(1): 36-39.
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The quasi-static tensile and compressive experiments were performed in order to investigate the mechanical properties of conventional polyurethane foam plastics and reinforced ones by glass fiber bundles. The influence of material density and mass content of glass fiber bundles on mechanical propert...
New method of modeling stealth aircraft-s signal based on emulator
Li Ying, Huang Peiling, Wu Zhe
2009, 35(1): 40-43.
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There are great differences among the target-s radar cross section(RCS) in its different detect angle territory. Five different models about the partition of important radar detect territories were presented. In the computer simulation platform, it adopted the five different models to part the impor...
Fuzzy logic control based on genetic algorithm to integrated flight control for hypersonic vehicles
Li Huifeng, Wang Jian
2009, 35(1): 44-47.
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An integrated flight control system was designed according to the six DOF nonlinear general model of pitching channel of hypersonic vehicle. The system has an integrated flight control loop, which is composed of one fuzzy controller and two PD controllers. Based on genetic algorithm, the optimizatio...
Direct kinematics of Stewart mechanism robot
Zhuang Yufeng, Huang Xiguang, Liao Qizheng
2009, 35(1): 48-51.
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The Groebner-Sylevester hybrid approach was presented to obtain the closed-form solutions of the direct kinematics of the Stewart mechanism robot. The reduced Groebner basis under degree lexicographic ordering for the closed-form equations was presented based on computer algebra method. And 20 Groeb...
Fuzzy reliability of repairable consecutive- k -out-of- n system
Wu Yueqin, Zhou Hong
2009, 35(1): 52-55.
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Under the condition that a key component will have a higher priority of repair, a repairable consecutive-k-out-of-n:G system with one repairman was studied. The probability of states was derived by using Markov process. The membership functions of the states to success and failure were defined and t...
Node selection in simulation grid
Song Changfeng, Li Bohu, Chai Xudong
2009, 35(1): 56-60.
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Simulation grid is a networked simulation platform by combining modeling and simulation (M&S) technology and grid technology. Node selection is an important method to increase the performance of simulation execution in simulation grid. Based on the feature of resource heterogeneousness in simula...
Ultrasonic frequency pulse tungsten inert gas welding power source topology and welding applicability
Qi Bojin, Xu Haiying, Huang Songtao, Zhang Wei
2009, 35(1): 61-64.
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An ultrasonic frequency pulse tungsten inert gas welding power source was developed. The power source topology and work principle were introduced. By contrast with current waves output from conventional tungsten inert gas welding power source, faster rising and falling pulse current edges were outpu...
Flexible assembly technique for aircraft parts joining based on laser tracking and positioning
Mei Zhongyi, Fan Yuqing
2009, 35(1): 65-69.
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The technique of digital flexible assembly is one of the research directions in the field of aircraft manufacture in recent years. Aiming at aircraft parts positioning and joining, the technique and theory of digital flexible assembly based on laser tracking and positioning were studied. The laser t...
Numerical calculation and experimental verification of stress at joint between two pipes of thermal shrouds
Pang Hewei, Meng Xianhong, Zhang Xing
2009, 35(1): 70-73.
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The large special environmental equipment KM6 is subjected to repetitive stress. In order to assure the safely of space laboratories, two kinds types of thermal shroud structures with T and L shape were chosen and the stress analysis was carried out by use of PATRAN & NASTRAN software under stre...
Analysis for determining trim, stability and controllability of tandem helicopter
Li Guozhi, Cao Yihua, Yang Qian
2009, 35(1): 74-77.
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Two nonlinear tandem helicopter dynamic models (i.e. the vortex theory model and the momentum theory model) were built separately to trim the helicopter at the hover in the forward and backward flight. A computational method for the stability and controllability derivatives was proposed based on the...
Optimization of resolution on Java card
Zhang Dawei, Ding Wenrui
2009, 35(1): 78-81.
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The pre-resolution was proposed based on the process of Applets deployment in order to optimize the resolution on Java card. At first, The optimized structure of import, constant pool and export component in CAP(converted Applet file)and package registration table were given. The fixed length struct...
Air-combat ability and sensitivity analysis of modern fighter aircraft
Jin Lei, Zhang Shuguang, Sun Jinbiao
2009, 35(1): 82-86.
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With the characteristics of the 4th generation fighters and modern air-combat included, an improved hierarchical architecture model of the air-combat capability was put forward, and combined with the analytic hierarchy process and fuzzy membership function technique for the static evaluation of the ...
Noise suppression of fiber optic current transformer system based on robust control
Li Hui, Zhang Chunxi, Zhang Xi, Zhang Chaoyang
2009, 35(1): 87-90.
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The fiber optic current transformer is a system that comprises parameter uncertainty and noise signals. For improving precision of the system, the design of robust H -infinite controller was discussed. The fiber optic current transformer based on closed-loop detection was analyzed, and the model of ...
Fast and precise initial alignment of strapdown inertial navigation system on rolling base
Wang Xinlong, Ma Shan, Wang Haiyong
2009, 35(1): 91-95.
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The rolling base and the lever arm error are major factors affecting the performance of carrier weapons. Based on the initial alignment characteristic of strapdown inertial navigation system (SINS) on carrier weapons, the mechanism and compensatory method of the lever arm were analyzed. The feasibil...
Engineering analysis method in fluid-structure interaction problem of hemispherical parachute
Song Qianfu, Cao Yihua, Jiang Chongwen
2009, 35(1): 96-99.
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To carry out fluid-structure interaction (FSI) parachute simulation is difficult, but some engineering design work demands that the operation completes quickly and efficiently. Therefore, to meet this requirement, an engineering fluid-structure interaction simulation method was established to simula...
Hierarchical Markov decision processes based path planning for UAV in three-dimensional environment
Hong Ye, Fang Jiancheng
2009, 35(1): 100-103.
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The ability of path planning is an important ensure for unmanned aerial vehicle (UAV) in autonomous flight. A path planning model was based on Markov decision processes (MDP), in which the problem of path planning was regarded as looking for the best tactic through the model of environment and the p...
Error modeling and calibration method of AMR compass
Sun Hongwei, Fang Jiancheng
2009, 35(1): 104-107.
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During the hard magnetism calibration process of compass by traditional methods, the compass was always disturbed and the calibration parameters were relative values. Considering these problems, the errors of anisotropic magneto resistance (AMR) compass were analyzed, the error model of compass was ...
Novel adaptive denoising method for extreme noise based on PCNN
Liu Yuanmin, Qin Shiyin
2009, 35(1): 108-112.
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To implement the removal of salt and pepper noise effectively and the conservation of image details and textures, a novel adaptive denoising method for extreme noise based-on pulse coupled neural network(ADEN-PCNN)was proposed. A kind of detection mechanism was applied to discriminate whether a give...
Light-stripes matching method for raster binocular stereo vision sensor
Xie Guanghui, Wei Zhenzhong, Liu Zhen, Zhang Guangjun
2009, 35(1): 113-116.
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Light-stripe matching is one of the difficulties of raster binocular vision sensor. Usually, matching methods based light-stripe coding require projecting multi-images or viewing minimum stripes in one image. Additionally, when the depth of the measured object has a relatively large range of variety...
Testing control flow of composite service
Yu Ying, Jin Maozhong, Huang Ning
2009, 35(1): 117-121.
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OWL-S (Web ontology language for services) and linear temporal logic were used to investigate formal method of describing composite service flow for testing and analyzing dynamic testing information. OWL-S was used as requirements reference model of composite service. Combination of composite servic...
Novel structure of NC program processor for CNC system
Wang Qikui, Li Wei, Chen Youdong, Wang Tianmiao
2009, 35(1): 122-125.
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A novel structure of the interpreter for the special vendors using different standards was presented. A new structure was proposed for the purpose of reducing the time while developing a new interpreter for computer numerical control (CNC) system. The interpreter was divided into three sub-modules c...

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