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2007 Vol. 33, No. 03

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Flight loads analysis of longitudinal maneuver using experimental aerodynamic forces
Yan De, Yang Chao
2007, 33(03): 253-256.
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A method synchronously computing longitudinal maneuvering flight and flight loads based on nonlinear wind-tunnel test aerodynamic forces (experimental aerodynamic forces for short)was proposed. The coefficients of lift and pitch moment of experimental aerodynamic forces were introduced into the long...
Characters on kinetics energy of debris cloud in spacecraft
Jia Guanghui, Huang Hai
2007, 33(03): 257-260.
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To assess damage by debris cloud after orbital debris impacts and perforates pla te of spacecraft, and to use adequately LS-dyna/SPH(Smoothed Particle Hydrodyna mic) computer simulation result of the orbital debris hypervelocity impacting th e plate, depending on the result about 9.53mm aluminium sp...
Design of secondary-divergent vectoring nozzle based on secondary fluidic injection
Zhang Yongsheng, Wang Yankui, Yu Xiaowei, Deng Xueying
2007, 33(03): 261-264.
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Secondary-divergent vectoring thrust nozzle based on secondary fluidic injection was designed and the performance of vectoring thrust nozzle was studied by using computer simulation method. Several parameters, such as the angle of secondary-divergent section, the ratio of secondary fluidic injection...
Hypersonic combined cycle engine concept with tandem layout
Chen Min, Tang Hailong, Zhu Daming, Zhu Zhili
2007, 33(03): 265-268.
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Hypersonic turbo/ramjet combined cycle engine concept with the t andem layout was investigated to ensure that the civic aircraft can work reliabl y under a wide range of flight envelope(Ma＝0~5,H=0~30km).A non-linear combin e cycle engine model controlled by multiple variables was developed and veri...
Optimization design of wing-s thickness and twist angle using Euler equations
Li Yan, Zhu Ziqiang, Wang Xiaolu, Chen Zemin
2007, 33(03): 269-272.
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With the goal of maximizing lift-to-drag ratio, the optimization of three-dimensional wing-s section thickness and twist angle is discussed. Euler equations as flow field sovler and Powell method are used as design tools, and the wing-s aspect shape and airfoil are fixed. The thicknesses of wing sec...
Optimal Lambert two-impulse transfer using genetic algorithm
Chen Tong, Xu Shijie
2007, 33(03): 273-277.
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Numerical solutions of Lambert two-impulse orbital transfer with unfi x ed initial position and transfer time were studied. The velocity increment versu s initial position and transfer time were showed in the 3-dimensional plots or 2 -dimensional sections, which are valuable for the practical design...
Analysis of heat sinking vest with phase-change material
Fu Yang, Qiu Yifen, Ren Zhaosheng
2007, 33(03): 278-281.
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To investigate the thermal protection effects of a heat sinking vest w ith phase-change material in high-temperature and high-humidity environment a nd the feasibility of numerical computation of heat transfer to the vest, based on the analysis of heat and mass transfer characteristic about the acco...
Search method of dipping sonar on ship borne antisubmarine aircraft
Bai Jing, Han Liang
2007, 33(03): 282-285.
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To aim at the enemy submarine's linear elusion in the mustering instance of the ship borne antisubmarine aircraft, a forecasting search method b ased on the cooperation of two ship borne antisubmarine aircrafts was proposed.T he initiatory detecting spot was confirmed grounded on the definite detect...
Target assignment in BVR air combat
Gao Yong, Xiang Jinwu
2007, 33(03): 286-289.
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Aiming at the key problem of threat estimation and target assignment in beyond-visual-range(BVR) air combat, a new non-parameter threat estimation model was formulated based on characteristics of BVR air combat, which takes into account aircraft-s combat effectiveness and situation superiority inclu...
Flow and heat transfer in rotor-stator system with pre-swirl angle of 30°
Luo Xiang, Xu Guoqiang, Tao Zhi, Ding Shuiting
2007, 33(03): 290-293.
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An experimental study of the flow and heat transfer characteristics in a pre-sw irl rotor-stator system was described. Pre-swirl cooling air thr ough nozzles with angle of 30° in the stator flows radially outwards and leav es system from the clearance between rotor and stator. The distributions of t...
Fuzzy gain scheduling control for electro-hydraulic servo velocity system
Ma Jungong, Wang Shifu, Wang Zhanlin
2007, 33(03): 294-297.
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Abstract:
Considering the nonlinear and the parameters variability, which vary widely with the working condition in the electro-hydraulic servo velocity system, fuzzy gain scheduling controller was developed. Based on the change of output error and its differential, the PID(proportion integral differential)pa...
Neighborhood-aided trace method in improving efficiency of ray tracing
Huang Minjie, Li Wei, Wu Zhe
2007, 33(03): 298-301.
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In order to improve the success rate of scattering point search, the neighbors of the reference elements in reference paths were considered while the scattering points were not found on the reference elements, and the single reference path was also doubled to increase the efficiency of ray tracing. ...
Reliability of fault tolerant control system with Markovian parameters
Gao Fei, Zhang Hongyue
2007, 33(03): 302-306.
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Fault tolerant control system with Markovian parameters(FTCSMP), as a model of active fault tolerant control system(AFTCS), was used to analyze the system stability in several papers. However, little research was on the reliability of FTCSMP. FTCSMP model was used to evaluate the reliability of redu...
Trajectory tracking control of three-DOF planar under-actuated manipulator
Liu Shengping, Wu Licheng, Lu Zhen
2007, 33(03): 307-310.
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The trajectory tracking control of a three-link planar under-actuated manipulator was presented. The third joint of the manipulator was passive. The dynamic constraint on the free link was shown to be second-order nonholonomic. Motion equations of the system were transformed into high order chained ...
Video quality assessing model based on single image quality with different weights
Chang Qing, Tong Yubing, Zhang Qishan, Wu Jinpei
2007, 33(03): 311-314.
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Concerning HVS (human visual system) physiological characteristic with the temporal-spatio correlations of video sequence, a video quality assessing model was proposed based on single image quality with different weights. Single image quality was assessed by using NN (neural network) and SVM (suppor...
Fuzzy-PID double mode control of ultra-precision AC servo syst em
Lu Zesheng, Zhang Qiang
2007, 33(03): 315-318.
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Abstract:
It is difficult to establish mathematical mode for AC servo system , because it has several disadvantages, such as parameters varying as time, load disturbing, motor being non-linear, and so on. Fuzzy control need not establis h the mathematical mode of controlled plant, but steady state precision i...
Jitter compensation system in solar X-EUV imaging telescope
Zhang Xin, Su Donglin, Li Baoquan, Peng Jilong
2007, 33(03): 319-321.
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Abstract:
The constant attitude control motions of the satellite often result in a platform that is not stable enough for mounting a high-resolution telescope. The jitter compensation system commands the CCD camera to shift one phase in the appropriate direction so that light from a point of the sun will cont...
High-accuracy measuring system for position and attitude in pushing-bridge construction based on machine vision
Li Chao, Li Yunhua
2007, 33(03): 322-326.
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The feature of the present measuring system for position and attitude in pushing-bridge construction was analyzed and the system’s primary problems were specified. Directed by all the problems and on-site requirements, a kind o f photoelectric measuring system composed of CCD sensors, laser collimat...
General development platform for airborne equipments automatic test system
Sun Baojiang, Qin Honglei, Li Jie, Shen Shituan
2007, 33(03): 327-331.
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Aiming at the problems in the development process of automatic test system (ATS), a general development platform for ATS was presented. The platform joints the software and hardware design together, after inputting test points information and test strategy flows of unit under test(UUT) by interface,...
BP networks method of handing-over point of KKV
Zhu Bo, Quan Quan, Cai Kaiyuan
2007, 33(03): 332-335.
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To reduce the missing distance and lessen energy consumption, the handing-over point with regard to proportional guidance law was analyzed for KKV(kinetic kill vehicle). The expected position of handing-over point was defined; the approximate nonlinear relationship between the expected position and ...
Attitude estimation method for micro attitude estimation system based on FD
Zhao Shifeng, Zhang Hai, Fan Yaozu
2007, 33(03): 336-340.
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The attitude of carrier with the tri-accelerometers and the tri-gyros respectively in a micro inertial measurement unit(MIMU) was estimated. Meanwhile, a strapdown inertial navigation system (SINS) was constructed and a Kalman filter was adopted to estimate attitude error derived from the attitude e...
Design of focal plane array of radio telescope
Lü Shanwei, Wu Dongmei, Wang Wei, Nan Rendong
2007, 33(03): 341-344.
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In order to increase the field of view (FOV) of the radio telescope, a new grid method named the conforming grid was proposed when the FOV of the telescope was analyzed. With this grid, the physics optical (PO) method is more accurate and fewer grids are needed compared to the conventional PO method...
Qualitative and quantitative analysis of fuzziness for stochastic structure performance
Chen Jianjun, Jiang Tao, Zhang Chijiang
2007, 33(03): 345-349.
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To overcome the deficiency that the safety membership function of a structure or a system in safety engineering sometimes involves subjectivity in the application of profust reliability theory, a preliminary study was made for finding out the rootstock of the performance fuzziness of a random system...
Subsequence matching algorithm between number trend sequences
Jia Suling, Chen Dangyang
2007, 33(03): 350-353.
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To overcome the demerits of traditional trend sequences- analysis in temporal data mining, two concepts that were number trend sequences and trend sequences unwrapping were put forward. According to features of number trend sequences, radians were used to represent the trends of line segments. DTW-Q...
Mean time to repair modeling oriented uni-mission for weapon system
Bi Jun, Wang Shaoping, Shi Jian
2007, 33(03): 354-356.
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As an important quantificational index for maintainability, the predication method and algorithm of mean time to repair (MTTR) are always dependent on experimentation and experience. Through the queue research of mission-furnishment-maintenance oriented to uni-mission, the MTTR model was to be estab...
Concept of testability determine test and relative method for FDR
Xu Ping, Kang Rui
2007, 33(03): 357-360.
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To solve absence problem of the method in determining the product-s testability level and find the difference between the practical testability situation and the requirements, the concepts of testability test and testability determine test was proposed. With the only consideration of fault detection...
Experiments on surface structure for micro assembly using adhesive bonding
Ma Weimin, Jürgen Hesselbach, Huan Ji
2007, 33(03): 361-365.
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Micro adhesive bonding technology shows great potential in the assembly of micro-electro-mechanical system(MEMS) products. The quality of micro assembly using adhesive bonding is sensitive to two factors:the fluctuation of the adhesive volumes and the spread of the meniscus.In order to solve this pr...
Application of evolutionary strategy in layout optimization of non-scale engineering drawing
Li Jiangtao, Liu Jinghua, He Tao
2007, 33(03): 366-369.
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The problem of unscientific layout and inferior readability currently exists in the non-scale engineering drawing which is generated automatically. Constraint conditions of engineering drawing were analyzed taking pipeline assemble drawing for example. The layout problem was simplified into the leng...
Visual servoing control in robot-assisted stereotactic neurosurgery
Liu Junchuan, Zhang Yuru, Li Zhen
2007, 33(03): 370-374.
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Positioning accuracy is one of the most important specifications in robot-assisted stereotactic neurosurgery. A visual servoing control method in robot-assisted stereotactic neurosurgery was presented to improve the overall positioning accuracy of the robot system. The position-based endpoint closed...
Auto-correlated charts based on dynamic Bayesian model
Cui Jingwei, Xie Liyang
2007, 33(03): 375-378.
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In statistical process control it is usually assumed that the observations taken from the process are independent. However, for many processes the observations are autocorrelated, and this autocorrelation can have a significant effect on the performance of traditional control chart. The problem of m...

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