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2004 Vol. 30, No. 03

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Application of FEA and laser measurer for optimization design of FOG
Lin Heng, Du Xinzheng, Zhang Chunxi, Ma Jing
2004, 30(03): 189-191.
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Abstract:
The vibration stability of FOG(fiber-optic gyroscope) is one of the most important factors in design. With the theories of vibration analysis and finite element analysis (FEA), the natural frequency, vibration modes and dynamic analysis were calculated and simulated by ANSYS5.7. The FOG's vibration ...
Simultaneous lateral thrust and aerodynamic control of an agile missile
Zou Hui, Chen Wanchun, Wang Peng, Yin Xingliang
2004, 30(03): 192-196.
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The blended control of a tail-controlled agile missile with attitude control motors is discussed. A controller, including aerodynamic control surface and pulse type lateral jets, was developed. It was divided into two parts: the control law and the blend logic. The control law can be designed easily...
Analysis of climbing obstacle capability of lunar rover with planetary wheel
Deng Zongquan, Gao Haibo, Wang Shaochun, Hu Ming
2004, 30(03): 197-201.
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For determination of perpendicular climbing obstacle capability of lunar rover with planetary wheel, based on simplified mechanics model of rover the paper gives the relations between rover parameters and perpendicular climbing obstacle height under three conditions: simultaneously climbing obstacle...
Tensile mechanical properties and constitutive relation of microcellular polycarbonate
Lu Zixing, Zhang Hui
2004, 30(03): 202-205.
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Microcellular plastics is a kind of special foamed plastic with some unique mechanical properties. On the basis of tensile test data of microcellular polycarbonate, some mechanical properties are investigated in this paper, including the effects of density and strain rate on the tensile stress-strai...
Structural design study of a micro-turbojet engine
Huang Zhiguo, Shan Peng, Wang Yanrong
2004, 30(03): 206-209.
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The presented work is referred to the structural design of a high power density micro-turbojet engine with a thrust 100 N and a rotational speed 105 r/min. First, the general overall tectonic characteristics of a microengine are mentioned. Secondly, the particular structural design characteristics o...
Research on the reliability modeling of SCI rings in avionics system
Jiang Zhen, Shao Dingrong, Xiong Huagang
2004, 30(03): 210-213.
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Abstract:
The problem of reliability modeling of the SCI(scalable coherent interface) is studied. According to the specification of SCI protocol and the ICD(interface control document) file as well as the reference in the design of avionics system, a message-based source-destination reliability criteria is pr...
Using grey theory estimates cost of unmanned plane's repairing
Chen Yuhong, Liu Jun
2004, 30(03): 214-216.
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The estimate about the cost of repairing is important to the LCC(life cycle cost) estimate of unmanned air vehicle, which is time sequence function. The traditional method can not estimate the LCC accurately because the quantity of the samples is limited. The grey theory is introduced to estimate th...
Artificial-neural-network-based nonlinear adaptive control and simulation
Wei Dong, Ma Ruiping, Zhang Minglian, Shi Xiaorong
2004, 30(03): 217-221.
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The increasing complexity of the nonlinear systems highlights the need for advanced modeling and control techniques for effective control. An artificial-neural-network-based nonlinear adaptive control system was studied, which identified the dynamics of the plant with improved NARMA(nonlinear auto-r...
Delay analysis of self-organized TDMA VHF datalink
Zhang Jun, Li Zhongxiao
2004, 30(03): 222-226.
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The method of slots reservation affect on the time delay performance of self-organized time division multiple access (S-TDMA) system heavily. In allusion to the backdate search arithmetic typically used in the dynamic slot assignment scheme, the influence exerted on message delay by slot idle probab...
Prediction of aircraft handling qualities and pilot induced oscillation susceptibility using unified theory
Xiong Lingfang, Fang Zhenping
2004, 30(03): 227-231.
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Abstract:
A unified theory is offered that can provide predictions of handling qualities levels and PIO(pilot induced oscillation) rating levels in single-axis tracking tasks, with linear or nonlinear vehicle dynamics. The theory is derived from the feedback topology of the structural model and a set of rules...
Design and implementation of a communication server for monitoring large-scale fleets
Yuan Cangzhou, Liu Zhongkan, Zhang Qishan
2004, 30(03): 232-235.
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Abstract:
To support large-scale fleets to communicate with multiple monitoring centers using both short message service and general packet radio service, a communication server was designed based on the careful study of the communication model. The server implemented most critical communication functions suc...
Research and implementation on Web services-based single sign-on system
Hu Yishi, Huai Jinpeng
2004, 30(03): 236-239.
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Abstract:
Users need to authenticate themselves to each service provider during they finish an operation that involves several services owned by different providers in the dynamic loose-couple environment because of development of distributed technology and application. Analyses the Web services-based single ...
New location algorithm of car license plate using cross-correlation vector map
Cao Xiaoguang, Zhu Fengyun
2004, 30(03): 240-243.
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Abstract:
Vector map is a kind of computer graphics formed by matrix of vectors. These vectors are results of cross-correlation of two related particle images.This technique is called PIV(particle image velocimetry). A new algorithm for extraction of car license plate is introduced, which is called VMLA(vecto...
Development of intelligent magnetic heading sensor and analysis of its error compensation algorithms
Yang Xinyong, Huang Shengguo
2004, 30(03): 244-248.
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The design of a micro intelligent magnetic heading sensor and error sources which affect heading accuracy are introduced. Further, three compensation algorithms based on BP neural networks, least square method and ellipse-specific fitting method are presented respectively. Each compensation algorith...
Research on the application of Petri net to MTA
Ma Lin, Lü Chuan
2004, 30(03): 249-253.
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Abstract:
Problems of MTA were analyzed. Based on the discussion of the merits of Petri net, the concept of modeling the maintenance task with hierarchical-timed-colored Petri net was presented. The approach to describe the logical and temporal relation by Petri net was studied, and the procedure of setting u...
Technique based on surface element of prepositive disposal in predicting RCS of aircraft
Li Xiuyi, Ning Tao, Xi Ping
2004, 30(03): 254-257.
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Abstract:
Predicting RCS(radar cross section) of aircraft is the basic and important content of technology. A technique for prepositive disposal in predicting RCS of aircraft by using computer graphic method and NURBS(non-uniform rational B-spline) surface and Bézier surface is presented. The technique can re...
Computation and research of the "zero-zero" jettison trajectories of the aircraft canopy
Gong Jie, Yang Chunxin, Yang Xinming, Xu Xiaodong
2004, 30(03): 258-262.
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Abstract:
The motion model of "zero-zero" jettison of aircraft canopy was developed to get the trajectories of the jettisoned canopy and the perfect jettison angle, and the agreement between model prediction and experimental measurement result was satisfactory. The rule of the air input of the underside cavit...
Research and implementation on Web services-based service-oriented software architecture
Liu Bochao, Ma Xiaoxuan, Ge Sheng, Huai Jinpeng
2004, 30(03): 263-266.
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Abstract:
Based on the Web service-based service-oriented software architecture, ACT-WSOA(ACT-Web service-based service oriented architecture) is proposed and implemented, which includes service requestor based on the general client, service registry based on the UDDI(universal description, discovery and inte...
Optimizing design method for centrifugal impeller its engineering application and numerical simulation
Dai Simin
2004, 30(03): 267-271.
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An optimizing design method for centrifugal compressor impeller has been presented, which has been applied to an engineering design of a practical centrifugal compressor. 3D viscous numerical simulation has been performed to these three stage compressors with CFD software TASCflow. Therefore the opt...
Residual stress analysis of thermal barrier coatings
Li Zhihua, Li Huanxi, Xu Huibin, Gong Shengkai
2004, 30(03): 272-275.
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An expression for calculating residual stresses in a thermal barrier coating structure was developed. Effects of Young's modulus, coefficients of thermal expansion (CTE) and thicknesses of the ceramic coating and thermally grown oxide (TGO) were analyzed based on the expression. The main results are...
Study of algorithm for maneuvering target state estimator
Peng Kemao, Shen Gongzhang, Wen Chuanyuan
2004, 30(03): 276-279.
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The algorithm of state estimator for maneuvering target is studied based on the assumption of quasi-steady state of flight path of the fighter. By selecting virtual measure variable and state variable, and by supposing the flight path of target is in quasi-steady state, this algorithm converts the p...
Temperature characteristic of a kind of hollow-fibber membrane module used for oxygen enrichment
Liu Meng, Wang Jun
2004, 30(03): 280-282.
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The influence of temperature on O2/N2 separating property of a kind of hollow-fibber membrane module is studied through experiments. The result shows the working temperature can highly affect the separation characteristic of the membrane and does not affect oxygen concentration, which can be used fo...

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