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2004 Vol. 30, No. 02

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Real-time flight path planning for combat mission
Xia Jie, Gao Jinyuan
2004, 30(02): 95-99.
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Based on A* heuristics search algorithms, two efficacious real-time methods for combat mission were presented. By instead of direct distance with fold distance, the expanded number could decrease and the searching rate could speed up. Adding virtual threats, the limits of minimize turning radius and...
Graphical electromagnetic computing method research based on IGES files import
Ye Guopeng, Zhang Yunfei
2004, 30(02): 100-104.
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At different wave band and polarization, the high frequency RCS of a model was computed with the graphical electromagnetic computing (GRECO) method. The shadowed and eclipsed surfaces were identified by using the visualization hardware, and the unit normal to surfaces were got with 5 light sources t...
Motion analysis and simulation control of numerical controlled transverse stretching machine for aircraft skin
Li Weidong, Wan Min, Zhan Qiang, Xu Chengxi
2004, 30(02): 105-108.
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On the basis of analysis of the mechanism of a numerical controlled transverse stretching machine, the software of the mechanism motion analysis was developed by reverse solution method. And the model and motion simulation of this machine were built in UG software. The accuracy of the reverse soluti...
Simulation design based on state-space for environment test equipment
Zhai Huanchun, Shang Na, Wang Jun
2004, 30(02): 109-113.
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To calculate the system capacity accurately in environment test equipment design, a simulation scheme was introduced. This scheme was based on distributed parameter model and the model was expressed in state-space. In the traditional design, refrigeration of loading was regarded as completeness atth...
Field calibration technique for 3D surface non-contact measurement system
Zou Zhiyong, Li Xiaoxing, Zhou Xianbin
2004, 30(02): 114-117.
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A simple field calibration technique was described to calibrate binocular vision senor for 3D measurement. The technique only required two cameras to observe a planar pattern shown at one position, and it did not need assistant structures. There were many control points printed on the planar pattern...
Development on database of aircraft sheet metal forming
Wan Min, Li Xinjun, Liu Yufang, Jiang Yong
2004, 30(02): 118-121.
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To coordinate deeper technology renovation for aeronautic industry and elevate the conventional aircraft sheet metal forming process with information technology, based on a great deal of data and information from the aircraft manufacturing, pre-research, sheet metal forming manual, and process tests...
Object-oriented undirected graph model in P&ID design system
Hao Guoshun, Liu Jinghua, Li Shicai
2004, 30(02): 122-126.
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When developing P&ID aided design system, the logical topology information between entities needed to be represented. In order to avoid the complexity of importing additional abstract entities, a new model is designed in which the logical topology information is united to the primary entity's da...
Research on GHP model with constrained departing and landing capacities
Luo Xiling, Zhang Qishan
2004, 30(02): 127-130.
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The ground-holding problem (GHP) model with constrained departing and landing capacities was presented. This model solved the cases including the multiple runways, the international arriving/departing capacities and the consecutive flights, which are not covered in the single runway GHP model. The s...
Performance analysis and improvement of phase gradient autofocus algorithm
Chen Qi, Li Jingwen
2004, 30(02): 131-134.
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The realization of phase gradient autofocus (PGA) algorithm was described. Based on the analysis of the shortcoming of PGA and the study of the roles of the basic steps of phase gradient autofocus algorithm, two methods were proposed to improve the performance of the PGA algorithm. First, a new way ...
Cushioning properties of polyurethane syntactic foam
Yuan Yinglong, Lu Zixing
2004, 30(02): 135-138.
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Syntactic foam is a new kind of foamed polymer. It is very important to value its cushioning properties. On the basis of static and dynamic stress-strain curves of polyurethane syntactic foam, their cushioning curves were calculated and their cushioning properties were valued. The results show that ...
Combined design and analysis of durability and damage tolerance for flight structure
Chen Bo, Bao Rui, Zhang Jianyu, Fei Binjun
2004, 30(02): 139-142.
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Based on existing durability and damage tolerance analysis method, a new way of flight structure design and analysis by synthesis was presented. It solves the problem that designing with durability or damage tolerance method separately will affect the optimization design for the flight structure. Th...
Study on reliability for flight control system under influence of thrust misalignment
Chen Yunxia, Sun Yufeng, Duan Chaoyang
2004, 30(02): 143-146.
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Thrust vector misalignment is an important factor, which causes trajectory scatter and affects missile reliability. In order to find design defect and enhance system reliability, the technique of integrated analysis of performance and reliability under the thrust's random misalignment was put forwar...
Numerical analysis of heat transfer in typical turbine blade cooling configuration of ribbed passage and pin fin arrays
Zhou Jianxing, Tao Zhi, Wu Hong, Ding Shuiting
2004, 30(02): 147-151.
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Numerical simulation was used to investigate the heat transfer of a typical turbine blade cooling configuration of ribbed passage and staggered pin fin arrays. Numerical results indicate that the distribution of heat transfer coefficient lacks of uniformity in the pin fin region. Calculation shows t...
Mixed flow fields numerical simulation of ram air turbines with autocoarse pitch
Fang Xiangjun, Liu Siyong, Wang Ping
2004, 30(02): 152-155.
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The aim of numerical experiment of ram air turbines is mainly to simulating its adjustable-pitch aerodynamic characteristic on the actual flight-refuel conditions. The Baldwin-Lomax turbulence model and the Reynolds-averaged Navier-Stokes were used to simulate the 3-D internal and external mixed flo...
Visual modeling method for test inputs of real-time embedded software
Ai Jun, Lu Minyan, Liu Bin
2004, 30(02): 156-159.
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The simulation testing, a major technique for real-time embedded software (RTES), is used in many important fields. Based on the analysis of the characteristics of RTES inputs, a visual modeling method for inputs of RTES simulation testing was established. Three steps are abstracting the input class...
Study on active vibration control of piezoelectric intelligent flexible beam
Wu Dafang, Liu Ancheng, Mai Hanchao, Fang Yuanpeng
2004, 30(02): 160-163.
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The active vibration control of the flexible cantilever beam with PZT actuators was studied, and the principle and the method of theactive vibration control were analyzed. Using the independent mode space controlmethod, the active control experiment on the first-order and second-order mode vibration...
QoS control framework with QoP feedback for real-time video
Pu Juhua, Xiong Zhang, Shi Xiaoyan
2004, 30(02): 164-167.
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The BEST-EFFORT internet can't meet such quality of service (QoS) requirements as bandwidth, latency, and loss of real-time video applications, so the application layer QoS control strategies, congestion control and error control, are widely used. A joint transport framework of real-time video that ...
Numerical simulations of hypersonic three-dimensional chemical non-equilibrium flows
Ma Hui, Zhao Lie, Wang Famin
2004, 30(02): 168-172.
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High temperature chemical non-equilibrium phenomena have a great effect on the flow field around a reentry vehicle. A three dimensional Navier-Stokes equations were solved by implicit finite volume NND scheme. Both ideal gas viscous flow and chemical non-equilibrium flow were calculated for a sphere...
Discussion about seal test of electronics in GJB
Zhang D, an
2004, 30(02): 173-176.
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The problems about sealing test of electronics in GJB were analyzed. Improved methods were presented, which provide the references for controlling theseal quality of military products scientifically. Failure data from a seal test processed by some factory are given to illustrate the importance of st...
Development of theories on polymer-based nanocomposites
Wang Kai, Zhan Maosheng
2004, 30(02): 177-183.
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A review of the development of theories on polymer-based nanocomposites was presented. Attention was focused on the researches of thermodynamics, kinetics and micro-mechanics of polymer/layered silicate nanocomposites. The theoretical investigation on polymer/inorganic particle nanocomposites were a...
Design and implementation of short message gateway for vehicle monitoring systems
Yuan Cangzhou, Zhang Qishan, Liu Zhongkan
2004, 30(02): 184-188.
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Based on the study of short message communications model, a short message communications gateway was carefully designed and implemented so that the vehicular devices can connect to multi reporting centers conveniently and transparently. In order to improve the gateway's performance, the concepts of ...

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