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2003 Vol. 29, No. 5

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Simulation and Verification of the Temperature Field in Laser Bending Sheet Metal
Wang Xiufeng, Lü Xiaodong, Hu Shiguang, Chen Guangnan
2003, 29(5): 377-381.
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Temperature field in the laser bending process was numerically simulated by MSC. Marc software. Variations of temperature with time to cause sheet metal bending were calculated. Simulation result was verified by the temperature on the lower surface of the sheet metal, which was measured by the therm...
Study on the Reconfiguration of Blood Vessel Wall
Wang Shoumei, Xu Ming, Li Ning
2003, 29(5): 382-384.
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By-pass operation leads to reconfiguration of blood vessel wall. Growth deforma t ion gradient through stress potential in the restructuring of blood vessel was p roposed and a numerical example was given. The results indicate that at the begi nning of reconfiguration, stress in the blood vessel wal...
Quasi Asynchronous Parallel Process Migration Algorithm Based on Message Forwarding
Zhang Yi, Hu Jianping
2003, 29(5): 385-388.
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A new quasi-asynchronous parallel process migration algorithm based on message forwarding was presented to solve the problem of process migration in parallel c luster system. The algorithm used message driving out mechanism, message forward i n g mechanism, priority matching buffer mechanism, etc., ...
ChecklistBased Process Tailoring Method
Cao Huiming, Jin Maozhong, Liu Chao
2003, 29(5): 389-393.
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It is a key and complex technique that tailors the organization's standard softw are p rocess to get the defined software process fitting the specific characteristics of the project. The organization's standard software process was discussed. The pr ocess tailoring was discussed. Four aspects impact...
RealTime SSR Signal Processing System Based on MultiDSP
Niu Lipi, Mao Shiyi, Li Shaohong
2003, 29(5): 394-397.
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A real-time secondary surveillance radar (SSR) signal processing system was des i gned by using four digital signal processing (DSP) and two field programmable ga te array(FPGA)．The system consists of two real-time signal-processing boards of DSP+FPGA mechanism．It implements processing of signals fr...
Aircraft Engine Fault Diagnosis Research Using Model Identification Based Method
Zhu Zhili, Meng Fantao
2003, 29(5): 398-401.
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The capability of model identification which bases engine performance diagnostics applied to a twin-spool and separated flow turbofan engine, was evaluated using limi ted monitoring parameters. The model identification was based on non-linear eng i ne performance simulation code, so the non-linearit...
Design of Fuzzy Logical Gain Scheduling Controller for Flight Control Based on LMI
Zhang Peng, Wei Chen, Zhou Rui, Chen Zongji
2003, 29(5): 402-405.
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Linear matrix inequality(LMI), H-infinity control and fuzzy logic control techniq ues were used for constructing such controller. With these techniques, the synth esis problem was reduced to a convex optimization related to LMI. A detailed pro cedure for developing a fuzzy logic gain scheduler over ...
Interval Perturbation Method for Computing Regions Containing Complex Natural Frequencies of Structures
Qiu Zhiping, Wang Xiaojun, Ma Yi
2003, 29(5): 406-409.
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By interval mathematics, the problem on regions contain ing complex eigenvalues for structures with errors or uncertain but bounded para meters was studied. These parameters were described by interval numbers. The non -proportional damping structural eigenvalue problem with errors or uncertain bu t ...
Analysis and Study Dynamical Characteristics of Control System of Small Coaxial Helicopter
Feng Yachang, Li Shengjun
2003, 29(5): 410-414.
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Not only practical mathematics model of longilndinal system was established for small coaxial helicopter remotely, but also the dynamical characteristics and th e influence of parameter change were analyzed. By experiment and flying tes t data, the model is proved to be correct, belivable, and its p...
Design of Differential Game Controllers Using Adaptive Critic Neural Networks
Zhou Rui
2003, 29(5): 415-418.
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An adaptive critic structure including three neural networks was developed to so lve the two point boundary value problem of differential games．Two control neur al networks were used to optimize the controllers on two sides of the differenti al games,and a co-state neural network was used to approxi...
Study of Microbiologically Influenced Corrosion of LY12 Aluminum Alloy with Atomic Force Microscopy
Li Songmei, Liu Jianhua, Wu Hao
2003, 29(5): 419-423.
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Sulfate-reducing bacteria induced corrosion of aluminum alloy LY12 was investig ated by using atomic force microscopy, as a function of concentrations of Fe 2+, Cl-, SO2-4 ions of the test solution. With in creasing Fe2+ concentration, the corrosion of LY12 alloy was obviously pro moted. Similar eff...
Graphic and Automatic Tactical Missile CFD Systemic Platform
Yan Chao, Zhang Lixin, Li Tinghe, Long Yaosong
2003, 29(5): 424-427.
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A completed tactical missile systemic platform which succeeded in full graphics user interface, automatic grid generation and CFD technique was introduced here in. This platform mainly bases on mixed-languages programming technique s of visual basic and fortran, with a vast employments of database. ...
Control Law Reconfiguration under Control Surface Failure  for Nonlinear Aircraft Dynamic
Li Weiqi, Chen Zongji
2003, 29(5): 428-433.
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The application of pseudo-inverse method based flight control reconfiguration i n the 6 degrees of freedom aircraft model was introduced. The failure considered here is the control surface effectiveness loss or lock-in-place. Via the appro priate linearization of the control coefficients, the reconf...
Constructing Streamlines in 3D CFD Flow Field
Li Haisheng, Yang Qin, Chen Qiming
2003, 29(5): 434-437.
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Streamline construction is a technique for flow visual ization. To avoid the conversion from physical space to computational space, a f ast point location algorithm for constructing streamline based on the normal of tetrahedron was proposed by dividing the curvilinear grids of CFD comp utation into ...
Construction of Free ImageBased Virtual Space
Qi Yue, Shen Xukun, Zhao Qinping
2003, 29(5): 438-442.
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The important research field of virtual reality (VR)is how to construct image-b ased virtual space by image-based rendering techniques. How to enlarge the extent of freedom is the key issue. Free image-based virtual space (FIBVS) is a kind of this virtual space where users can manipulate freely. A m...
Single Runway GHP Model Research Based on DES
Luo Xiling, Zhang Qishan
2003, 29(5): 443-446.
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A new single runway ground-holding problem (GHP) model based on discrete-event system (DES) was presented. According to the different con ditions influencing the airport runway landing service time, the model was categ orized into the deterministic type and the stochastic type. The solving algorith ...
BOM Management Based on SSPD
Jiang Hui, Fan Yuqing
2003, 29(5): 447-450.
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It is a critical problem to manage all of the BOMs in the product li fe-cycle in product data management. The key of BOM management is the data mode l of BOM, as is to establish the relationship between BOMs. By analysis of the BOM from the view of product life-cycle, the BOM evolvement theory was e...
Scene Matching Algorithm Based on Similarity SecondOrder Difference
Huang Xishan, Chen Zhe
2003, 29(5): 451-454.
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An algorithm was presented, in which the minimum of second-order difference of similarity surface was adopted as the criteria of the selec tion of scene matching points, on the basis of analyzing the characteristics of scene matching similarity surface. The trustability of the matching point can be ...
Generation of Reliability Test Data with UML for RealTime Embedded Software
Ai Jun, Lu Minyan
2003, 29(5): 455-458.
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Real-time embedded software, such as the navigation and the flight control syst ems, requires large amount of testing to measure their reliability according to the ultra-high reliability requirement. A united model language(UML)-based rel iabilit y test data generation method for real-time embedded ...
Selection of Catalysts Used in the Preparation of WaterSoluble Phenolic Resol Resin
Yang Guang
2003, 29(5): 459-462.
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The effect of the kinds of basic catalysts on the preparation of water-soluble phenolic resol resin was investigated. The water-soluble resol was prepared by the reaction between phenol and formaldehyde with molar ratio 1:1.2~1.5 in the presence of catalysts at 80~85℃. The catalysts were made up of ...
Study on Residual Propellant Vaporized in Tank  of Some Launch Vehicle Third Stage
Sun Bing, Fang Jie, Zhang Huazhao, Zhang Fuzhong
2003, 29(5): 463-466.
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A zero-dimensional model was proposed to study on residual propellant vaporized in tank of some launch vehicle third stage. The assumptions used in the model and equations were given. By simulating the vaporization of cryogeni c propellant under given solar radiation angel, the variation of gas temp...
Evaluation System of SinkingResistance for AutoBody Sheet Material
Li Dongsheng, Zhou Xianbin, Lü Xiaodong, Wang Chengpu
2003, 29(5): 467-470.
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The sinking-resistance is one of the important performance properties of automo bile panel. The evaluation methods of sinking-resistance for auto-body sheet w ere proposed and some key factors were introduced, which include test principle, shapes/status of specimens as well as evaluating parameters ...

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