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2000 Vol. 26, No. 1

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Study on Shape-Memorizing Function of Ethyl-Vinyl Acetate Copolymer
WANG Shi-ren, GUO Mei-li, XU Xiu-cheng, HE Peng
2000, 26(1): 1-4.
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Abstract:
The characters of shape-memorizing polymer were analyzed and some evaluations standard on it were proposed,such as shape recovered rate,shape fixed rate and shape recovered speed,etc. The shape memorizing function of the EVA plastic had been studied,the results indicated that the EVA plastics can be...
FiniteElement Analysis of Temperature Field of PCB and Components
LI Xiao-ming, Lü Shan-wei, GAO Ze-xi
2000, 26(1): 5-7.
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Heat transfer was introduced. The finite-element method (FEM) is used to investigate steady-state two and three-dimensional heat transfer in dual-in-line component and PCB. Two methods are compared through real examples' temperature distribution. And experiments with point test method are done to co...
A Kind of Dipole Antenna with Broadband Characteristics
Lü Shan-wei, YANG Xue-bin, JIA Xiao-xiao, ZHOU Jian-jun
2000, 26(1): 8-11.
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Abstract:
The broadband dipole antenna presented is a rotationally symmetric structure consisting of conductor wire whose surface shape is smoothly joined by biconic section, spherical stage and cylinder dipole each other in series in the direction of antenna axis, fed by a coaxial cable with impedance of 50 ...
Prediction Method of Visibility of GLONASS Satellites
LIU Hui, WANG Yin-feng, ZHANG Qi-shan
2000, 26(1): 12-14.
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A visibility prediction method of GLONASS satellites is presented based on the developing experience of GLONASS receiver. Given a certain known status, the spatial rectangular coordinates of the predicted satellite are calculated according to the satellite's operating law. Then the coordinates are c...
Improved Method for Designing Wideband Microstrip Antennas
LIU Zhang-fa, Lü Shan-wei, LI Shi-zhi
2000, 26(1): 15-18.
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Abstract:
The narrow bandwidth property of a microstrip antennas is one of the main reasons that restrict its wide usage, the way to broaden the bandwidth of microstrip antennas has been concerned by investigators. A simple and practical method for the design of broadband microstrip antennas is proposed in th...
High Frequency Resolution Acousto-Optic Channelized Receiver
CHENG Nai-ping, JIANG Xiu-fu, SHAO Ding-rong
2000, 26(1): 19-21.
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Abstract:
Through the basic principle analyses of acousto-optic channelized receiver, how to improve the SNR by increasing integrating time is discussed. The mathematical model of acousto-optic channelized receiver is establish to get further analyses. Based on this model, a few important parameter of the rec...
Evolution of Intelligent Transport System(ITS) and its Model Research
YANG Dong-kai, WU Jin-pei, ZHANG Qi-shan
2000, 26(1): 22-25.
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Intelligent Transport System (ITS), also called Road Transport Telematics (RTT) in Europe, is a new transport system based on high-tech including system engineering, electronics, telecommunication and informatics, and which penetrated into airborne, railage and marine. ITS can amplifier the capabili...
Robust Fault Diagnosis of Integrated Navigation System
JIN Hong, ZHANG Hong-yue
2000, 26(1): 26-29.
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The problem of fault detection of a navigation system is discussed and an approach to detect faults of an integrated navigation system is proposed by designing the optimal robust vector sensitive to special navigation system fault in this paper. Only the measurement data of sensors are used, and the...
Induced-Oscillation of Man-Vehicle Closed System of FBW Aircraft
FENG Ya-chang, LI Lu-yu
2000, 26(1): 30-33.
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Severe Pilot-Induced-Oscillation(PIO), which is potentially dangerous, paroxysmal and may lead to losing control of flight, is the principal cause of the frequent accidents in the development of FBW aircraft. This compels us to study its flying dynamic mechanism, find out the corresponding design de...
New Control Method of Adaptive Fuzzy-Neural Networks for Brushless D\^C\^ Motor
FAN Zheng-qiao, MA Shu-tong
2000, 26(1): 34-37.
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Abstract:
This control method was based on combining fuzzy control with adaptive and bang-bang control. Fuzzy controller and mechanism are realized by neural networks. In double closed loop system the current regulator consists of proportional and integral controller, the speed regulator consists of bang-bang...
Synthetic Stress Life Testing for Hydraulic Pump
WANG Shao-ping, LI Pei-qiong
2000, 26(1): 38-40.
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Abstract:
In accordance with the features of hydraulic pump, this paper analyzes the failure mode and selects the sensitive stress. According to failure effects that sensitive stresses impose to hydraulic pump and researches that the U.S.A life test standardization develop, we can drive at the conclusion that...
Some Questions on Kalman Standard Decomposition of Linear Time-Invariable System
ZENG Jian-ping, CHENG Peng
2000, 26(1): 41-44.
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It is shown that for a linear time-invariable system,its Kalman canonical form can not be obtained by decomposing the system into its controllable canonical form,and then decomposing its controllable and uncontrollable subsystems into their observable canonical form,respectively.The possibility is d...
Design of Life Usage Monitoring System of Aeroengine Critical Part
HONG Jie, ZHANG Da-jun, HAN Ji-bin
2000, 26(1): 45-48.
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Abstract:
It takes very important role that aeroengine load and life monitoring technology in monitoring and assessing operating condition, life consumptiom and remaining life of aeroengine. It can improve the safety and reliability, and reduce direct usage cost of engine. In this paper, the life usage monito...
Comprehensive Analyses of Energy Spectrum and Reflection Coefficient in front of Vertical Breakwaters
XUE Xiao-chun, ZHAO Zi-dan
2000, 26(1): 49-51.
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The distribution rule was investigated of energy spectrum and reflection coefficient by the method of wave spectrum. For some reason,the results by experimental and mathematical method were out of regular allowance without considering influence factor of the reflection coefficient. Because energy sp...
Study on Ventilating Design Method in High Speed Train
ZHUANG Da-min, LIN Guo-hua, YUAN Xiu-gan, WANG Xiao-xin
2000, 26(1): 52-55.
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Abstract:
For the characteristic of high closing in compartment of high speed train, the ventilating design should ensure passengers' safety and comfort. Since the traditional method of temperature and velocity distribution depending on free jet experimental equations cannot consider the effects of push pull ...
Human Thermal Comfort Calculation of Air-Conditioned Cockpit
WU Yu-ting, LIN Guo-hua, YUAN Xiu-gan
2000, 26(1): 56-59.
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Thermal comfort is a important standard for assessing a cockpit air-conditioning system. A thermal comfort calculation model of air-conditioned cockpit is founded on the base of human thermal balance equation and thermal comfort hypothesis proposed by P. O. Fanger. Furthermore, the assessment method...
Engineering Calculation Research of Aerodynamics　for Aircraft with Double-Delta Wing Configuration
HUANG Jun, WU Wen-zheng, WU Zhe, KE Xian-de
2000, 26(1): 60-63.
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The lift and drag characteristics of double-delta wing configuration is more ascendant than that of delta wing configuration. To seek for the optimized aircraft design scheme with numerical methods is firmly bottomed upon the engineering calculation of aircraft aerodynamics. By using the semi-experi...
Fuzzy Optimization of Geometrical Parameters of Fighter Basing on Fluctuating Weights
LI Jing, LI Tian, WU Zhe
2000, 26(1): 64-66.
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Basing on the theory and formula of fluctuating weights given by Prof. Wang Peizhuang, the character of the fluctuating weights and the comprehensive evaluation function of the fluctuating weights and the difference between the fluctuating weights and constant weights are discussed .And then the flu...
Use of Fuzzy Optimization in Conceptual Design of Fighter
LI Jing, LI Tian, WU Zhe
2000, 26(1): 67-69.
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Abstract:
Linear function is used to form the satisfactory functions of the objectives and constraints of the integrated aerodynamic-stealth design of fighter geometrical parameters, such as the root chord and tip chord of the wing, half span of basic wing, the leading-edge sweepback of the wing, the sideway ...
Calculation of Transient Heating Load for Avionics Pod
YU Jian-zu, CHEN Yan-min, SU Nan
2000, 26(1): 70-74.
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The calculation of transient heating load is fundamental to the design of the environmental control system (ECS) for avionics pods. In this paper the dynamic heat-balance equation for the avionics pod and the heat transfer equation for the pod wall have been established. The transient heating load o...
Characteristic Analysis of Composite Thin\|Walled\= Beams under Constrained Torsion
DENG Zhong-ming, ZHU De-chao
2000, 26(1): 75-78.
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Based on Vlasov theory, a layered warping model was presented for mechanical analysis of composite thin-walled beams with arbitrary closed-section. Besides the effects of shearing strain and torsion warping, the influences of materialsand the ply arrangement on the warping displacement and stress ar...
Image Processing Method of PIV Technique
DUAN Li, KANG Qi, SHEN Gong
2000, 26(1): 79-82.
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The image processing method of PIV was studied on the base of the image correlation theory in this paper. The simulated particle image displacement field was reconstructed. The reconstruction result of auto correlation and cross correlation , and the error of cross correlation were given. The differ...
HPIV and its Application
DUAN Li, KANG Qi, DING Han-quan, SHEN Gong
2000, 26(1): 83-86.
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HPIV technology can realize the measurement of three-dimensional velocity (u,v,w) in a three-dimensional space. Using two Nd: YAG pulsed lasers , two exposures, two symmetry reference lights, and off-line holographic technique, three-dimensional particle flow field was recorded. Using SPIV technique...
Active Vibration Control of Smart Plate with SelfSensing Piezoelectric Actuators
FANG You-liang, WU Zhe
2000, 26(1): 87-90.
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For the four laterals simply supported plate, the transverse deflection of plate is expanded over the modal shapes, the electroelastic model with self-sensing actuators plate is given, and the current is considered as output variable of measurement equation. Generalized modal coordinates being state...
Interactive Method and Experiment in 3D Human Motion Data Abstraction
JI Bai-hua, YUAN Xiu-gan, WEN Wen-biao
2000, 26(1): 91-94.
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Interactive method is raised in this paper to abstract three dimension human motion data from video by combining human distinguishing and computer graphics simulation. The approach to abstract human three dimension data is a whole posture, not a single joint, and which is different from the manual a...
Construction of Scene Database in Distributed Simulation
HE Hong-mei, ZHAO Qin-ping
2000, 26(1): 95-98.
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The construction process of scene database is introduced in detail. Some key technologies which are used during the construction process are discussed, such as the advantages and disadvantages of equal sampling interval terrain model and triangulated irregular network terrain model, three integratio...
Grinding Parameter Optimization of Conical Drill Point Grinding Method
JIANG Hong-dao, Lü Yan-ming, CHEN Wu-yi, CHEN Ding-chang
2000, 26(1): 99-102.
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The conical grinding method has four grinding parameters, and for three drill point geometric parameters, the lip clearance angle, chisel edge angle and point angle, the flank configuration is not unique. So one more drill point geometric parameter is needed, such as heel clearance angle, chisel edg...
Automatic Generating 2D Drawing Based on 3D Feature Design Model
MEI Zhong-yi, ZENG Ling-wei, WU Bin
2000, 26(1): 103-106.
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The basic principle and implementing method was mainly discussed of automatically generating 2D drawing based on parametrical feature modelling system (LONICERA system ). The emphasis is introducing the theorem of creating projection view and cross-sectional view. Different to traditional 2D draftin...
Research and Implementation of SDAI-Based Engineering Data Management System
ZHAO You-zhen, ZHANG Tong, LIU Yi-e, DENG Jia
2000, 26(1): 107-110.
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Beginning with the most fundamental persistence function, solutions were presented which involve expanding EXPRESS model using Object-oriented Modeling Technology; extending SDAI contents properly; achieving objects' self-supplied -O function; and implementing the object-oriented encapsulation and d...
Alternative Evaluation Criterion of Constructing Decision Tree of Discrimination
WANG Hui-wen
2000, 26(1): 111-113.
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An alternative criterion of evaluating the built decision tree for discrimination is discussed in this paper. The maximal decrease in undistinguished degree is proposed as the principle to choice explanatory variable for building a binary tree. From the basic concept, this new criterion is approxima...
Numerical Approach to Robust Stability Test of Mixed Uncertain Systems
ZHANG Yuan, JIA Ying-min
2000, 26(1): 114-117.
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The robust stability analysis of mixed uncertain systems can be completed by testing the H∞ norm of edges of an uncertain rational function. To reduce the computational complexity, a numerical approach is proposed for a class of mixed uncertain systems whose coefficients affinely dependent on system...
Software Model for Computer-Aided FMECA
ZHAO Ting-di, SUN Lin-ling, TU Qing-ci
2000, 26(1): 118-121.
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According to the theory of CAD framework and software architecture, the computer aided FMECA software model was analysis and established. Firstly, the target of FMEA software and design strategy was discussed. And then data model of the product, failure mode, and result of FMECA was established usin...
Right Essential Orders of Nonlinear Systems and its Application
WANG Lian-gui
2000, 26(1): 122-124.
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Abstract:
A new set of invariants was defined for right-invertible nonlinear control systems,the right essential orders. We prove that this set of natural numbers is invariant under regular static state feedbacks. On the other hand, it is pointed by an example that the right essential orders are changeable by...

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