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2011 Vol. 37, No. 7

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Optimization method of finite thrust emergency orbit maneuver for an earth observation satellite
Yu Peijun, Wang Wei, Li Jiancheng
2011, 37(7): 757-761.
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The optimal emergency orbit maneuver method for an earth observation satellite was studied, which uses the finite thrust model. The mission requirement of the emergency orbit maneuver was investigated firstly. A twice orbital maneuver technique was adequately chosen to make the algorithm universal. ...
Robust control law design for fixed-wing airplane coordinated turns
Wang Xinmin, Xiao Yahui, Deng Wan, Xie Rong
2011, 37(7): 762-765,781.
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Taking certain fixed-wing airplane as example, the controller structure of H∞ state feedback control combined with proportion integration differentiation (PID) was designed to solve the sideslips of coordinated turns. Based on the fixed-wing airplane linearization model, the application of H∞ state ...
Applications of X-ray pulsar based navigation in high precision orbit estimation
Huang Xianlin, Chen Zhengmin
2011, 37(7): 766-771.
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X-ray pulsar based navigation (XNAV) can provide spacecrafts with autonomous positioning service. The accuracy of standard XNAV is coarse, in addition to that the pulsar timing model error and clock error can cause an approximate static bias in measurement error. Simulation results shows that 2 puls...
Analysis of non-linear stability of guided projectile using lateral impulsive thrust
Yang Hongwei, Dou Lihua, Gan Minggan
2011, 37(7): 772-776.
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The analysis of non-linear stability of guided projectile under the condition of high attack angle after lateral impulse was presented. Integral was applied to describe the equations of projectile motions, and consequently, the polynomial for cosine variation of the attack angle was obtained. By ana...
Rapid trajectory optimization for hypersonic reentry vehicles with multi-constraints
Wang Junbo, Song Xun, Song Jianshang, Ren Zhang
2011, 37(7): 777-781.
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A rapid trajectory optimization was developed to handle the high dynamic and multi-constraints accompanying with hypersonic reentry vehicles. The equation of constraints in reentry process was established and the control variable of bank-angle was displayed as a subsection linear function of flight ...
Integration of aeroramp injector/gas-portfire igniter insupersonic combustor
Yan Minglei, Wei Baoxi, Xu Xu, Shi Xinxing
2011, 37(7): 782-788.
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A novel hydrocarbon-fuel injection and ignition/flameholding system consisting of aerodynamic ramp(aeroramp) injector and gas-portfire was designed, which was investigated experimentally and numerically to figure out the supersonic flowfield and its combustion. Color schlieren and surface oil-flow v...
Vehicle following algorithm realization based on flexible curved bar
Zhang Xiaomei, Chen Weihai, Liu Jingmeng, Zhao Zhiwen
2011, 37(7): 789-794.
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To solve the tracking accuracy problem of vehicle following system, when the leader vehicle was accelerating or turning, a novel algorithm based on a virtual flexible curved bar was proposed to apply for vehicle following. A virtual flexible curved bar was supposed to connect the leader and the foll...
Tough terrain walking algorithm for cockroach robot
Chen Bin, Wang Jianhua, Chen Weihai, Ren Guanjiao
2011, 37(7): 795-800.
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To solve bad system rigidity and weak bearing capacity of series connecting mechanism, the couple four-bar linkage mechanism was proposed, which can synthesis advantages of existing mechanism. The cockroach robot based on couple four-bar linkage achieved moving agilely, good rigidity, strong bearing...
Coverage-scheduling integrated routing in wireless sensor networks
Fu Yinfei, Xiong Qingxu
2011, 37(7): 801-804,838.
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By employing the most-constrained least-constraining (MCLC) algorithm and directed diffusion (DD) and low energy adaptive clustering hierarchy (LEACH) routing protocol respectively, the performance in terms of nodes energy consumption, the balance of the consumption and the network lifetime of the c...
Multi-stages necking process and mechanism of precision thin-walled can
Chen Hui, Lang Lihui, Du Chuanjun, Luo Xiaoliang
2011, 37(7): 805-810.
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Based on the multi-stages necking process of the precision thin-walled can, the deformational behavior of the material in each stage necking process was analyzed, the first necking process and the subsequent necking process was distinguished, and the definition of the die angle was given out. The co...
Random encryption scheme based on variable S-boxes
Wang Wenhua, Zheng Zhiming
2011, 37(7): 811-816.
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How the variable S-boxes would affect the security of the block cipher was studied and a new block cipher using random variable S-boxes was presented. A new encryption scheme based on such block cipher was put forward: the structure of the original encryption algorithm was kept, the S-box was taken ...
Tension restrained workspace analysis for cable-driven parallel robot
Chen Weihai, Yang Yangyi, Wu Xingming, Chen Quanzhu
2011, 37(7): 817-821.
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Cable-driven 3-DOF(three degree-of-freedom)robot was free to rotate in the workspace. For the cable was unilateral which was only may be stretched but not be compressed. To control the robot better, it was significant to research the cable tension. By using the geometry and the matrix method, it was...
Precise docking control in unmanned aircraft vehicle automated aerial refueling
Wang Honglun, Du Yi, Gai Wendong
2011, 37(7): 822-826.
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The control scheme and strategy for unmanned aircraft vehicle automated aerial refueling were proposed based on analysis of the vortex effect of tank and the free oscillation of drogue. The improved reference trajectory generator and trajectory tracking controller for receiver were used for automate...
Nonlinear modelling and open-loop dynamatics characteristics for one hypersonic aircraft
Chen Jie, Zhou Shaolei, Song Zhaoqing
2011, 37(7): 827-832.
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Considering that the hypersonic aircraft nonlinear dynamatic system owns the characteristics of nonlinear output, highly coupled of state vector, a novel sliding surface observer and controller design based on Lyapunov function was presented. During the course of observer design, overload output sli...
Flutter analysis of inflatable wings
Xie Changchuan, Wang Weijian, Yang Chao
2011, 37(7): 833-838.
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The stiffness of inflatable wing is determined by the internal pressure, so the static and dynamic coupling method should be established to solve the flutter problems of such wings. The structural stiffness and the normal modes should be calculated on the base of the static analysis. Then the unstea...
Los information reconstruction of half strapdown seeker
Yang Baoqing, Xu Long, Yao Yu
2011, 37(7): 839-843.
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Optical detector of strapdown seeker was fixed rigidly to the missile body, and many traditional guidance information processing methods can not be applied directly. The half strapdown seeker was studied. According to its different structure, reconstruction algorithm of the line-of-sight(LOS) rate w...
Design and realization of all digital closed-loop system of Coriolis mass flowmeter
Wang Shuai, Zheng Dezhi, Fan Shangchun, Tian Jing
2011, 37(7): 844-848,854.
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The digital closed-loop system of Coriolis mass flowmeter (CMF), in which the field-programmable gate array (FPGA) and digital signal processing methods were used to realize stable and accurate closed-loop control, has good real time and high precision. The speed parallel component FPGA was adopted ...
Vehicle visual navigation algorithm based on detect of horizon
Fu Bingdao, Ding Wenrui, Wang Guangbiao, Li Hongguang
2011, 37(7): 849-854.
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Combined with the demand of vehicle’s visual navigation system and the features of aerial images, a horizon detection algorithm which is used by visual navigation and based on the similarity between regions of images and tabu search was proposed. A single frame extracted from aerial video sequences ...
Optimization of systematic calibration method for SINS in outer field—optimal six-position
Mu Yutao, Zhou Zhenwei, Fang Haitao
2011, 37(7): 855-860.
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In the static multi-positions calibration method for strapdown inertial navigation system(SINS), the precision of parameters estimate is influenced by the positions arrangement. For the six-position calibration method, nine initial measurement init error parameters, including accelerometer bias, acc...
AFDX based simulation of flight management system
Li Dachuan, Cheng Nong, Li Qing, Song Jingyan
2011, 37(7): 861-867,876.
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Modeling and digital simulation are important phases in the development cycle of the civil flight management system. The distributed real-time simulation structure of the flight management system was proposed. The core function modules of the flight management system including flight planning, fligh...
HCI develop trend based on user-experience
Wei wei, Gong Xiaodong
2011, 37(7): 868-871.
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The rapid development of information technology and the expansion of web platform bring the new requirement and possibility for human-computer interaction(HCI) design. Through extending Maslow-s hierarchy of needs to HCI field, It was proprosed: the future HCI design will try to satisfy users- exper...
Longitudinal frequency-domain equivalent matching method for flight control system based on short time Fourier transform
Ji Xiang, Xia Jie
2011, 37(7): 872-876.
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Based on short time Fourier transform(STFT), a study was carried out on longitudinal frequency-domain equivalent matching for time-domain data in flight control system. The input signals of the system were first decomposed by STFT to achieve those signals that most interest the pilots. Then fast Fou...
Modeling and analyze of the environmental factors of carrier-based aircraft catapult launch in complex environment
Guo Yuanjiang, Li Huijie, Shen Gongzhang, Yang Ting
2011, 37(7): 877-881.
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The process of carrier-based aircraft catapult launch was complex, disturbed by the motion of aircraft carrier, deck wind, disturbance ahead of the bow and ground effect. The condition of carrier-based aircraft catapult launch was described by the simulation model of motion of aircraft carrier, deck...
Binocular stereo vision navigation for electric VTOL aircraft
Zhang Bohan, Cai Zhihao, Wang Yingxun
2011, 37(7): 882-887.
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A stereo vision-based navigation method for the electric vertical take-off and landing(VTOL) aircraft to wander safely through an unknown dynamic indoor corridor was researched. The aircraft uses two cameras to obtain images from different locations, and then the theory of binocular stereo vision wa...
Two-step anti-windup control of helicopter
Wang Qing, Wang Yong, Peng Cheng, Miao Lifeng
2011, 37(7): 888-894,900.
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The all attitude control and velocity track of helicopter with actuator saturation constraints was considered. A two-step anti-windup control approach was proposed, which can be applied to open-loop unstable systems such as helicopter. Without consideration of saturation constraints, H∞ loop shaping...
Determination of damage tolerance and remaining lifefor aeroengine crankcase
Qing Liye, Wu Sujun, Zhao Haitao, Liu Ying
2011, 37(7): 895-900.
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In order to ensure the safety of aircraft, fracture assessment for an aeroengine crankcase was carried out. Based on finite element method, a model for the local crankcase fitting seat was established and the geometry factor Y for different crack lengths was obtained. Using the procedure of BS7910, ...
Context aware and group based access control
Yao Quanying, Yao Shuzhen, Huang He, Tan Huobin
2011, 37(7): 901-906.
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Role based access control(RBAC) mainly depend on role given by the theme to achieve the protection of natural resources. In the control of the permissions, execution context, how the customs organize and manage were not taken into account.In order to adapt dynamic requirements of the application env...

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