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2005 Vol. 31, No. 08

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Numerical computations of infrared signatures in exhaust flow fields of jet engines
Zhan Guang, Lee Chunhian
2005, 31(08): 829-833.
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The thermal radiation field in a high temperature gas flow is coupled with the flow field. However, within the temperature range of the exhaust flow field for a jet engine, the thermal radiation effects can usually be ignored in the computations of the flow field, and the governing equations on the ...
Design of thermal control system for high-altitude and high-speed unmanned vehicle
Liu Yongji, Dong Sujun, Wang Peiguang, Wang Jun
2005, 31(08): 834-838.
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Abstract:
According to design of thermal control system for UAV(unmanned aerial vehicles), which is characterized by small flight time-consumption, high speed, and quick change in altitude, thermal analysis and calculation methods which can be applied to practice engineering were put forward. Hot atmosphere, ...
Extraction of subpixel insect wing features in images
Wang Ying, Zhang Guangjun, Chen Dazhi
2005, 31(08): 839-842.
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Wing vein, junction of veins and wing edges are the fundamental image features for wings 3D reconstruction to obtain insect deformations motion parameters. To determine precise position of the wing features in images, gray properties of wing features were analyzed first. For wing vein features, the ...
Design and analysis on dropping trajectories of RLV configuration
Yang Fan, Zhang Shuguang
2005, 31(08): 843-847.
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The flight trajectories of a RLV(reusable launch vehicles) configuration were designed and the flight dynamics were analyzed along the trajectories. The whole flight process was divided into four phases as the S-turn phase to dissipate extreme energy, the acquisition phase to turn the vehicle for th...
Improved least-squares scene matching algorithm
Xu Baochang, Chen Zhe, Zhao Long
2005, 31(08): 848-852.
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In order to improve the matching speed and the robustness to initial positioning error and noise of the scene matching system, the scene matching model was set by analyzing the relationship of gray level between real-time image and referenced image. An improved least-squares scene matching algorithm...
Path planning for penetrating aircraft to fly at low altitudes based on technology of digital elevation map
Bai Xiaoli, Han Liang
2005, 31(08): 853-857.
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Path planning using TF/TA2 (terrain following, terrain avoidance, threat avoidance) technology is the key problem for the research in penetrating aircraft to fly at low altitudes. The terrain information is stored in a real digital map. To make sure the designed path applicable for the aircraft, pre...
Intelligent tactical mission management system for combat aircraft
Zhou Rui, Cheng Xiaojing, Yu Zhouyi, Chen Zongji
2005, 31(08): 858-862.
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Abstract:
An intelligent tactical mission management system for modern combat aircraft was proposed based on the cognitive decision process of perception, assessment and decision. As the key subsystems of the mission management system, the situation assessment and mission planning were investigated emphatical...
Real-time continuous multimedia task model and scheduling algorithm
Ruan Junbo, Li Hongbing, Jin Huihua
2005, 31(08): 863-868.
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Abstract:

The oversimplification of traditional periodic task model gives rise to poor flexibility, which can not adapt to multiple forms of real-time media stream applications. User-centered scheduling algorithm for continuous media brings in poor scheduling efficiency, for not considering QoS (quality of se...
Quantitative air combat decision
Yang Youchao, Jiang Yuxian
2005, 31(08): 869-873.
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A method to make air combat decision, the quantitative air combat decision, was presented. Based on the launch envelope and the launching condition of air-to-air missile, the air combat situation could be described quantitatively by defining the air combat situation function. Choosing the suitable m...
Study on sufficiency of sample set in testability demonstration based on information model
Shi Junyou, Kang Rui, Tian Zhong
2005, 31(08): 874-878.
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Abstract:
The failure mode information model of the product was created. This information model contained the failure mode data, the structural unit data, the function data, the test data and the mapping relation about them. According to this information model, three types’ failure mode equivalence sets were ...
Longitudinal aerodynamic estimation and flight tests for airship
Cui Xiumin, Wang Weijun, Fang Zhenping
2005, 31(08): 879-883.
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The longitudinal aerodynamic parameters of an airship were estimated in defect of the data from wind tunnel test, using the form in compilers group of aerodynamic handbooks. The characteristic of the airship was analyzed, using the linear small-disturbance equations, which was acquired from the line...
Experimental study on particle concentration in sand and dust equipment
Ma Zhihong, Li Yunze, Zhang Hua, Wang Jun
2005, 31(08): 884-887.
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Abstract:
Using the desert wind tunnel Laboratory of Institute of Desert Research in CAREERI of CAS, and applying laser particle imaging technology, the sand particle concentration in the different section from solid-gas nozzle on solid-gas two phase flow was measured and researched and contrasted with the ph...
Investigation on head of novel chemical thruster for orbit maneuver
Song Yana, Zhang Guozhou, Zhou Wenlu, Huang Xiang
2005, 31(08): 888-892.
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Abstract:
To develop light, reliable, sanitary space station maneuverable orbital transfer thruster, the novel gas dynamic resonance ignition method was applied. By means of thruster combustor design combined with coaxial hydrogen/oxygen resonance igniter investigation, method of using fuel-rich resonance ign...
Numerical simulation of supersonic MHD channel flows
Xu Zhengyu, Lee Chunhian
2005, 31(08): 893-898.
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A compressible MHD (magnetohydrodynamic) model composed of MHD N-S (navier-stokes) equations and magnetic induction equations was proposed for analyzing the magnetohydrodynamic characteristics in MHD generator and MHD accelerator channels of MPC (magneto-plasma-chemical) propulsion system. A splitti...
Analysis and modification of turntable’s axis calibration
Xu Yongan, Yang Qin, Huai Jinpeng
2005, 31(08): 899-903.
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A new method using the standard ball and geometrical transform technique was proposed to modify the calibration error of the turntable’s axis in three dimensional laser digitizing system. The turntable’s axis was counted by the center of the standard ball at 8 different rotation angles, The center o...
Development algorithm of single sampling inspection plan of pass-fail experiment
Li Xiaoyang, Jiang Tongmin, Xiao Lianghua
2005, 31(08): 904-907.
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Abstract:
In order to determine sampling test plan of pass-fail product more easily and fast, the integral equations equal to the accumulation ones were put forward. Testing plan can be efficiently solved by using these equations on computer. The equality of these two kinds of equations was proved; The numeri...
Effects of spraying powder composition and particle size on microstructures of Al-Cu-Fe quasicrystalline coatings
Cai Fei, Zhou Chungen, Gong Shengkai, Xu Huibin
2005, 31(08): 908-912.
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Abstract:
Quasicrystals have been widely applied for surface protection coating because of their distinguished properties including low thermal conductivity and coefficient of friction, remarkable oxidation and wear resistances, and high hardness etc. To improve the high temperature oxidation and wear resista...
Internal resonance property of flexible under-actuated manipulators
He Guangping, Lu Zhen, Wang Fengxiang
2005, 31(08): 913-916.
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Abstract:
The dynamic feature of the flexible underactuated manipulator under the state of free-swings or locked of the passive joints was analyzed. Through the nonlinear dynamic analyzing of a planar two-links flexible underactuated manipulator, it can be found that the internal resonance of the multi-modal ...
Joint power control algorithm for CDMA-TDD system
Zhang Shu, Rong Mongtian
2005, 31(08): 917-920.
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Abstract:
A joint power control algorithm based on current link information was proposed to address the shortcoming of the conventional power control algorithms for CDMA (code division multiple access) TDD (time division duplex) system. The joint power control equation was deduced in theory. In the new algori...
Research of ventilation cooling profile in reliability testing
Wang Xiaohong, Jiang Tongmin
2005, 31(08): 921-924.
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Abstract:
The applying of the ventilation stress in the reliability test of the airborne electronic equipment were introduced. Combined with the GJB and the characteristic of the environment control system of airplane, the ventilation and cooling condition of airborne electronic equipments in factual use envi...
Investigation of probabilistic safety assessment for in-service mechanical equipment steel structures
Luo Hongyun, Zhong Qunpeng, Zhang Zheng
2005, 31(08): 925-929.
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To solve the safety assessment problem of large-scale in-service mechanical equipments’ steel structure , the probabilistic safety assessment method was proposed under the dead load and fatigue conditions with the aid of second level method and Monte Carlo method. Amended equation of it was establis...
Genetic algorithm with double roulette wheels
Liu Gang, He Linshu
2005, 31(08): 930-933.
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Abstract:
Double roulette wheels genetic algorithm was proposed to deal with the inequality constraints directly. Deferent fitness function was built for the feasible and infeasible individual in the population, respectively. The fitness function of the feasible individual reflected the objective function val...
Formation mechanism analysis of aviation calamity based on Bayesian network
Luo Fan, Chen Xiaojia, Gu Bichong
2005, 31(08): 934-938.
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Abstract:
In order to prevent the emergence of accident-inducing elements and control the further development of them, to improve aviation security management to be scientific and reliable, and decrease the accident rate and aviation calamity loss. It is a key of formation mechanism analysis to probe into int...

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