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2007 Vol. 33, No. 05

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Improvement of dual-Euler method for full scale Eulerian angles solution of aircraft
Li Yuejun, Yan Chao
2007, 33(05): 505-508.
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Abstract:
To overcome the shortcoming of the original dual-Euler method, i.e., it presumes that the range of pitching angle was limited to and it can-t be used for continuous solution of super-maneuvering flight when the pitching angle was beyond this limited range, improvement was made to solve Eulerian angl...
Fast alignment model and method for inertial navigation system
Wang Xinlong, Ma Shan
2007, 33(05): 509-513.
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Abstract:
A fast alignment and calibration method of inertial navigation system (INS) were approached from a control theory point of view. Using the Lyapunov transformation was proposed for transforming the conventional strapdown inertial navigation system(SlNS)error model. And the equivalence of SINS and gim...
Fatigue life evaluation and test verification for civil aircraft structure under corrosive environment
Yang Hongyuan, Liu Wenting
2007, 33(05): 514-517.
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Abstract:
Rationality of the fatigue life evaluated method for civil aircraft structures under corrosive environment was validated by test for the chordwise joint parts of wings which were typical fatigue critical parts of civil aircraft structures. And the fatigue life of this part under corrosion was evalua...
Design of damping-ring for vibration control in labyrinth air seals
Zeng Liang, Li Lin
2007, 33(05): 518-522.
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Abstract:
The design and application of severed damping-ring to rotor/stator components are effective in protecting labyrinth air seals and the cylindrical walls of annular chambers against flexural vibration and fatigue failures excited by various disturbing forces. The dynamic analysis of contact system was...
Carbon dioxide accumulation of space station crew quarters
Fu Shiming, Xu Xiaoping, Li Jindong, Pan Zengfu
2007, 33(05): 523-526.
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Abstract:
In order to analyze the accumulation process of CO2 expired by crew in pressure cabin without proper ventilation and to evaluate the possible medical hazards, a computational fluid dynamics (CFD)model of crew staying in a given space station quarter was built to simulate the unsteady process of resp...
Optimal actuator placements for shape control of adaptive piezoelectric truss
Xian Kuicheng, Huang Hai
2007, 33(05): 527-530.
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Abstract:
With piezoelectric actuators as control elements, the basic equations of shape control for adaptive truss was formulated. A mathematical model of optimal actuator placements was presented, in which the actuator locations and the control voltages were taken as design variables, and the weighted prese...
Mechanical properties of 2A12 Al alloy at transient heating
Wu Dafang, Song Hao, Gao Zhentong, Yan Zhenqian
2007, 33(05): 531-534.
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Abstract:
Testing and determining the pivotal parameters such as ultimate strength and thermal stress at the complicated condition of transients heating is very important to the reliability estimate, life prediction of aerospace materials and security design of the high-speed flight vehicle. Because there are...
System model simulation and control method used in environmental simulation chambers
Li Ke, Pang Liping, Liu Wangkai, Wang Jun
2007, 33(05): 535-538.
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According to the dynamic state characters of the environmental simulation chamber, a lumped parameter model of temperature and a mathematical model of control system is established to accurately control the temperature of the environmental chamber to measure up to GJB, raise temperature rate and pro...
Fuzzy variable structure control for lunar gravity-turn landing
Zhu Jianfeng, Xu Shijie
2007, 33(05): 539-543.
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Based on fuzzy variable structure control, a new guidance law of gravity-turn landing has been developed for the terminal descent phase of lunar soft landing. The sub-optimal sliding surface and fuzzy controller were designed to drive sliding variable converging to zero that would make a soft landin...
Relative attitude estimation and control schemes for the final approach phase of spacecraft rendezvous
Zhu Renzhang, Lin Yan
2007, 33(05): 544-548.
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Abstract:
Motion equations of relative attitude between the target and chase spacecraft were elaborated for the final approach phase of spacecraft rendezvous and docking. Two algorithms of extended Kalman filtering based on vision observations were used to estimate relative attitude, one is through attitude e...
Affects of temperature and error compensation for fiber optic gyro
Wang Hai
2007, 33(05): 549-551.
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Abstract:
The thermal characteristic of fiber optic gyro(FOG) is one of difficult questions, it is a efficient method to improve the thermal characteristic of FOG by modeling. The characteristic of thermal affect induced nonreciprocity of optic loop was introduced , and it is one of the main reasons that affe...
Unscented quaternion particle filter application in micro-satellite estimating attitude
Wang Chen, Fang Jiancheng
2007, 33(05): 552-556.
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Abstract:
To solve the problem of low precision characters and non-Gaussian distribution noise of the micro-satellite attitude determination system, UPF(Unscented particle filter) was proposed. Based on the different characters between the UKF(Unscented Kalman filter) and PF(particle filter), UPF uses the UKF...
Fast stereo edge-matching algorithm based on corner-guidance
Li Haichao, Zhang Guangjun
2007, 33(05): 557-560.
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Abstract:
A new fast and robust edge-matching algorithm guided by matched corners was presented. In the whole matching process, the corner constraint and the edge constraint were proposed to guarantee the matching speed. First, the matched corners were used to guide the edge matching. How to use the previous ...
One-dimension angle-oriented projection template matching
Yin Runmin, Li Bohu, Fan Shuping
2007, 33(05): 561-564.
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Abstract:
Refer to two key stages in template matching between two overlapping images: template selection and iterative matching, an one-dimension angle-oriented projection template matching method was proposed. The matching process firstly evolved a template selection discipline based on gray level differenc...
Improved security enhancement for a dynamic ID-based remote user authentication scheme
Duan Xiaoyi, Zhang Qishan, Liu Jianwei
2007, 33(05): 565-567.
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Abstract:
Smart cards are secure, compact and intelligent data carriers, which can offers strong authentication and guaranteed non- repudiation. With the traditional authentication solution, the static password is rarely altered and maintained in the verifier table on the server. This is bringing forth the im...
Relationship between PCB material and power/ground impedance
Su Donglin, Wang Xiaoxiao
2007, 33(05): 568-571.
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Abstract:
To mitigate PCB(printed circuit board) power/ground impedance, which is a great negative influential factor to signal and power integrity of high-speed multilayer PCB , the relation functions among PCB power/ground resonant impedance,resonant frequency, resonant quality factor and the electromagneti...
New optimal control allocation method for flight control system
Yang Lingyu, Gao Jinyuan, Shen Gongzhang
2007, 33(05): 572-576.
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Abstract:
Control allocation method was investigated with the background of aircraft with multiple control effectors. A new optimal control allocation method, bases sequence control allocation, was put forward. The optimal objectives were divided into control objective and mission objective, and the control o...
Enhancement of a timestamp-based password authentication scheme
Qi Wenhua, Zhang Qishan, Liu Jianwei
2007, 33(05): 577-579.
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Abstract:
Yang and Shieh have proposed a timestamp-based password authentication scheme using smart card. The weakness of Yang and Shieh-s scheme is submitting password in plaintext and not authenticating key information center(KIC)by user. The new scheme improved the process of registration, login, authentic...
Phase estimation of sinusoid signal based on DFT and error analysis
Li Chunyu, Zhang Xiaolin, Zhang Zhan, Chang Jiang
2007, 33(05): 580-584.
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Abstract:
A fast and accurate estimation technique of initial phase of single-tone signal based on the phase of discrete Fourier transforms (DFT) spectrum was proposed. The initial phase is obtained by removing the frequency item in the multinomial using the DFT coefficient which is from two discrete sinusoid...
Workflow-based project management system for complex software prototyping
Liu Li, Mao Fei
2007, 33(05): 585-589.
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Abstract:
Modeling and simulation for a complex software prototyping system were computer supported cooperative work process. To effectively manage its business process and data and thus improve the efficiency of the whole system-s work, a workflow-based project management system was proposed. It was comprise...
Algorithm of weighted association rules mining with multiple minimum supports
Zou Likun, Zhang Qishan
2007, 33(05): 590-593.
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Abstract:
A new model of weighted association rule was presented in order to solve the problem that data item have not the same importance in datasets. Based on this model, a new algorithm of mining weighted association rules with multiple minimum supports was proposed. The algorithm allows the user to specif...
Application of pre-interpolation S-shape acceleration/deceleration in CNC look-ahead nterpolation algorithm
Cao Yunan, Wang Tianmiao, Chen Youdong, Wei Hongxing
2007, 33(05): 594-599.
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Abstract:
Aiming at improving the interpolation efficiency without lowering the path accuracy, the velocity look-ahead control in CNC(computerized numerical control) was introduced. Firstly, the interpolation geometry elements linking vector angle model, which was separated into line-connect condition and cir...
FEM design of cruciform biaxial tensile specimen based on limit stress analysis
Han Fei, Wan Min, Wu Xiangdong, Wang Haibo
2007, 33(05): 600-604.
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Abstract:
The cruciform biaxial tensile test is an effective and practical method to realize the process of complex strain paths for the investigation of subsequent yield behavior and forming limit of sheet metal, and the key questions should be solved including the large deformation, homogeneousness of stres...
Primary calculation of electronically controlled hydraulic power steering
Gao Feng, Liu Yahui, Ji Xuewu, Guo Xiaolin
2007, 33(05): 605-607.
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Abstract:
Electronically controlled hydraulic power steering (ECHPS) improves driver-s ‘road feel’ because it has alterable assistance character. Steering gear model and bypass ECHPS model were built based on the hydraulic principle of the control valve and ECHPS. A simple formula suited the two models was us...
Plasma spraying of the nano-structured TiO2 coatings and its photocatalytic properties
Yu Qinghe, Zhou Chungen
2007, 33(05): 608-612.
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Abstract:
The starting nano-TiO2 feedstock was agglomerated by spray-drying process. Nano-TiO2 coatings on transparent glasses were prepared by plasma spraying. The coating proceeded heat treatment at 300℃,400℃ and 500℃ respectively. The phase structure and the morphology of the TiO2 coatings were character...
Concept design integrated system and constellation architecture exploration
Guo Aibin, Mi Jie, Dong Xiaoqin, Deng Jiati
2007, 33(05): 613-617.
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Abstract:
The method of rapid architecture selection and concept design was further discussed. The elementary models of satellite constellation′s architecture selection and concept design combined with concept design process were introduced. Risk and uncertainty analysis were integrated into the models. The i...
Motion tracking and recognition of human hand in master-slave manipulation for dexterous hands
Li Jiting, Ren Dawei, Zhang Yuru
2007, 33(05): 618-621.
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Acquiring the motion information of human hands is a very important research problem in the master-slave grasping system for dexterous hands. Used to be the human-computer interface for the master-slave manipulation system for dexterous hands, a binocular stereo computer vision system was investigat...
CBR methodology application in fault diagnosis of aircraft
Li Qing, Shi Yaqin, Zhou Yang
2007, 33(05): 622-626.
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CBR(case-based reasoning) is a problem solving technique of using previous experience and cases to find a solution to new problems, which is suitable for those areas of experience-rich. CBR methodology was applied to the fault diagnosis and maintenance decision support of aircraft due to the abundan...
Product development two-factor risk model and simulation based on DSM
Zhang Hanpeng, Qiu Wanhua
2007, 33(05): 627-630.
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To solve the risk measurement of product development with iterations, a modeling method to evaluate the risk of schedule and cost in product development was constructed, and a simulation algorithm was given to analysis the risk of product development process. The model was constructed by two stages,...

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