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2008 Vol. 34, No. 04

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Optimal method of human-machine coupling with preview information
Wang Liang, Lu Yongjin
2008, 34(04): 361-364.
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Abstract:
For fully automatic machine system is awkward to deal with open and complex task, human quantitative and qualitative intelligence itself tends to be synthesized with it in such case then human machine system is constructed which is different from simple human-machine system in information interface ...
Pressurized pressure-restoring system for large scale vacuum chamber
Chen Jinming, Yuan Xiugan, Huang Bencheng
2008, 34(04): 365-368.
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Abstract:
Pressure-restoring process has strict requirements in some special purpose establishments such as ground simulator for astronauts- training. A pressurized pressure-restoring system was designed for large-scale vacuum chambers with a view of analyzing the pressure-restoring process with high speed re...
Modeling and control of vertically launching parallel vehicle
Yin Yongxin, Yang Ming, Wang Zicai
2008, 34(04): 369-372.
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Abstract:
In order to effectively control the motion of vertically launching parallel vehicle, an attitude control method for vertically launching parallel vehicle was presented. A singularity of Euler kinematical equations was analyzed, and kinematical equations of attitude motion were given based on quatern...
Influence of pixels to graphical electromagnetic computing accuracy and its solution methods
Fang Xiang, Su Donglin, Liu Yan
2008, 34(04): 373-376.
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Abstract:
In graphical electromagnetic computing (GRECO), the image rendering resolution was adjusted to improve the physical optics (PO) integral evaluation accuracy. In the PO integral calculation, the visible scattering surface was approximated by flat panels at the pixel level. Therefore the PO integral w...
Integrated heading system based on differential magnetic compasses
Hao Zhenhai, Huang Shengguo
2008, 34(04): 377-380.
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Abstract:
To solve the magnetic compass interference problem caused by the dynamic interference magnetic field in urban traffic environment, the feature of the dynamic magnetic interference was analyzed. And the concept of the differential magnetic compasses(DMC) was proposed. An integrated heading system mod...
Dynamics analysis of lunar lander-s landing process
Wang Chuang, Liu Rongqiang, Deng Zongquan, Gao Haibo
2008, 34(04): 381-385.
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The prototype of spatial trussed lunar lander was taken as a researching object. It was designed and manufactured by RCAMC HIT(Research Center of Aerospace Mechanism and Control, Harbin Institute of Technology). The simplified model of the lunar lander construction was given. Then, the location coor...
Durability analysis technology and application when loading spectrum is altered
Dong Yanmin, Liu Wenting
2008, 34(04): 386-390.
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In order to satisfy the requirements on durability evaluation of aircraft structure full scale fatigue (durability) testing when loading spectrum is altered, based on probability fracture mechanics approach and improved crack initiation approach of durability analysis, a method was presented to esta...
Design of the workflow form system based on shared model
Tang Wenzhong, Mo Weidong
2008, 34(04): 391-395.
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Form is the information carrier in the application system. The process of form system, workflow system and the coupling pattern of the workflow engine and form in the traditional workflow form system were analyzed. The definition of the form model and workflow model was deeply studied based on the m...
QoS analysis on IEEE- 1394b fiber optical bus system
Duan Jingyuan, Zhang Chunxi, Shi Jieqin
2008, 34(04): 396-399.
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Abstract:
In order to solve the problem of network delay and information obstacle in avionics system, the key characteristics which are bandwidth reservation mechanism and average response time of IEEE-1394b fiber optical bus system used in avionics system were analyzed. The equation which the QoS (quality of...
Expanded stochastic DAG model
Hu Kai, Jiang Yan, Chen Shiran, Xiang Yunting
2008, 34(04): 400-403.
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Abstract:
Considering the fact that parallel program structure can induce the randomcity of tasks- computing and communication cost, the definition of stochastic directed acyclic graph(DAG) was expanded, in which the heterogeneity and the parallel program structure were considered together. Based on this mode...
Effect of temperature shock on transmission properties of frequency selective surfaces
Zhang Chaofa, Li Huanxi, Lü Mingyun
2008, 34(04): 404-407.
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Abstract:
Temperature shock test followed the criterion of GJB 150-86 was completed for frequency selective surfaces (FSS) of different coatings and different machining process. The stability of transmission properties of FSS under temperature shock test was studied by the difference before and after the test...
Five-axis electro-hydraulic simulator dual motors synchronizing control
Wang Yanshan, Li Yunhua, Wang Yiqun
2008, 34(04): 408-411.
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A low cost approach for dual hydraulic motors synchronization was presented, which was used in five-axis flight motion electro-hydraulic simulator. The controller contained main immune controller and synchronizing controller. The main immune controller, which used the displacement, velocity, pressur...
High speed polishing CVD diamonds with hot metal plate
Ma Yongtao, Sun Yujing, Chen Wuyi
2008, 34(04): 412-416.
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Abstract:
By using high speed polishing equipment based on hot metal plate method(HMPM), experiments were carried out on temperature, speed, load and time to polish CVD(chemical vapor deposition) diamonds. Optical balance was used to compare the diamond weight before and after polishing. Tool microscope and a...
Numerical simulation of airfoil transonic viscous flow using GAO-YONG turbulence model
Yan Wenhui, Yan Wei, Gao Ge
2008, 34(04): 417-421.
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Numerical simulation of transonic viscous flow around NACA0012 airfoil and RAE2822 airfoil based on Gao-Yong compressible turbulence model were presented. The convection term and the diffusion term were discretized by the third-order ROE scheme and the second-order center difference(CD) scheme respe...
Information fusion technology in FOG/GPS integrated navigation system
Zhang Xiaoyue, Zhang Chunxi
2008, 34(04): 422-425.
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Fiber optic gyro(FOG) strapdown inertial navigation system used in orientation has an advantage of independence, but its system error accumulates with time; Global position system(GPS) can provide more accurate information, but it is interfered easily. FOG and GPS was integrated using information fu...
Effect of friction on identification of materials properties from spherical indentation
Qian Xiuqing, Zhang Jianyu, Fei Binjun
2008, 34(04): 426-430.
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By using the dimensional analysis and finite element computations, the frictional effects on spherical indentation of strain hardening solids to exact the plastic properties of material are examined. By defining a representative strain dependent on the energy, based on the representative strains and...
304 stainless steel rotary-twin-focus laser-TIG hybrid welding
Li Xiaohui, Wang Su, Xia Caiyun
2008, 34(04): 431-434.
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Abstract:
In order to improve the laser-arc hybrid welding quality, the rotary-twin-focus laser-TIG(tungsten inert gas) hybrid welding was put forward, which is a new welding method that can improve the welding efficiency at the same time. With the rotary-twin-focus laser-TIG hybrid welding head designed by B...
Design and implementation of multi-rate quasi-cyclic low-density parity-check code decoder
Zhao Ling, Zhang Xiaolin, Zhi Gang
2008, 34(04): 435-438.
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Abstract:
To meet the requirement of using multi-rate low density parity check(LDPC) codes in the communication system, a 7Kbit code length multi-rate LDPC codes decoder architecture was presented and implemented on a Altera field-programmable gate array device. The similarity between different check matrixe...
Calibration-compensation method for micro inertial measurement unit based on MEMS
Sun Hongwei, Fang Jiancheng, Sheng Wei
2008, 34(04): 439-442.
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Abstract:

According to angular velocity and accelerate error mathematical models of micro inertial measure unit (MIMU), a kind of quick calibration-compensation method called dynamic overturn 6 positions was proposed based on special features of micro electronic mechanical system (MEMS) inertial devices, whic...
Numerical simulation on flow control of stalled NACA0015 airfoil with synthetic jet actuator in recirculation region
Zhang Panfeng, Wang Jinjun
2008, 34(04): 443-446.
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Numerical simulation on the separation flow control of stalled NACA0015 airfoil at high angle of attack (20°) was carried out with synthetic jet actuator in the recirculation region. The Reynolds averaged Navier-Stocks equations were solved by commercial computational fluid dynamic software package ...
Fast calculation of wide angle RCS pattern of objects based on interpolation technique and FDTD method
Sun Weiping, Wu Zeyan
2008, 34(04): 447-451.
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Fast calculation of wide angle radar cross section(RCS) pattern of 3-D objects based on multinomial interpolation approximation and spline approximation was presented. When interpolation technique was introduced in finite difference time domain(FDTD) method, the calculation time was reduced. Firstly...
Data integration of design, analysis and manufacture for aircraft composite structures
Zhang Lihua, Fan Yuqing
2008, 34(04): 452-455.
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Abstract:
Implementing digital composite structure definition is the base of achieving the data integration of design, analysis and manufacture for aircraft composite structures. The digital composite structure definition consists of the modeling of geometry and the modeling of material structure. The process...
Flight loads analysis of a twin-tailboom aircraft
Xiao Zhipeng, Wan Zhiqiang, Liang Meng, Yang Chao
2008, 34(04): 456-459.
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Flight loads and aerodynamic derivative analysis of a twin-tailboom aircraft was performed. The longitudinal aerodynamic derivative, the efficiency of each control surface and the load distribution were considered emphatically, as a function of the tailboom stiffness of longitudinal bend and the fli...
Effect of spaces between cars on aerodynamic characteristics of cars in overtaking process
Zheng Hao, Kang Ning, Lan Tian
2008, 34(04): 460-464.
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Numerical simulation of unsteady flow fields around overtaking and overtaken cars by two different overtaking spaces between cars were conducted with computational fluid dynamics(CFD) method. Spalart-Allmaras turbulence model, QUICK discrete scheme, SIMPLEC pressure and velocity coupling arithmetic ...
Aerodynamic noise of a fastback car in uniform and accelerated motion
Lan Tian, Kang Ning, Zheng Hao
2008, 34(04): 465-469.
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Numerical simulation and analysis of flow field around a simplified fastback car and aerodynamic noise at some receiving point were conducted using CFD software FLUENT. The pulsating flow field was simulated by the large eddy turbulence model and the momentum equations were discretized with the unbo...
Simulation of thermal control system of nano satellite based on fuzzy control
Yang Juan, Li Yunze, Wang Jun
2008, 34(04): 470-473.
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A thermal system dynamic characteristics equation of a spherical nano satellite was built. And its temperature model was established after system steady temperatures were determined. A fuzzy logic controller was designed and combined it with the temperature model to complete the whole thermal contro...
Scheme effect analysis of numerical simulation on hypersonic double-cone flows
Zhang Jing, Yan Chao
2008, 34(04): 474-477.
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The performance of different numerical schemes were studied by simulation of a hypersonic flow past a sharp double cone. The capability of six numerical schemes—Roe FDS(flux difference splitting), van Leer FVS(flux vector splitting), AUSM(advection up-stream splitting method),AUSMDV, AUSM+ and upwin...
Comparison analysis between two kinds of DBL access codes
Jiang Hui, Li Daoben
2008, 34(04): 478-482.
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A new class of generalized large area synchronization (LS) codes named daoben lab (DBL) access codes was presented. DBL access codes are generated from the left or right kronecker product of the LS codes and the extending matrix, and are called DBL left-product codes and DBL right-product codes, res...
Fingerprint minutia matching algorithm based on ridge alignment
Wang Peng, Zhang Youguang
2008, 34(04): 483-486.
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Focus on the minutia matching algorithm which is important in automated fingerprint identification systems (AFIS). An improvement was made to the fingerprint alignment-based minutia matching algorithm. In the step of extracting minutia associated ridge information, ridge topologic information about ...

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