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2001 Vol. 27, No. 1

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Study of Storage Effect of Super-Strength Steel 37SiMnCrNiMoV
CHEN Yong-lai, CHEN Liang-shan, DONG Xiu-zhong
2001, 27(1): 1-4.
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Super-strength steel 37SiMnCrNiMoV is widely used in aerospace and astrospace because of the high specific strength. However the service life of the pressure vessel made of steel 37SiMnCrNiMoV will be decreased after long-term storage in air environment, the phenomenon is called storage effect. Stre...
Study on Evaluation of Localized Corrosion of 2024T3 Aluminum Alloy with EIS
HU Yan-ling, LI Di, GUO Bao-lan
2001, 27(1): 5-8.
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Alternating immersion test was applied to 2024T3 Al alloy. Electrochemistry Impedance Spectroscopy (EIS) by time domain method was performed on the specimens. Statistic method was also used to deal with data because localized corrosion is a stochastic phenomenon. The results show that the reciprocal...
Study on Character of Shape Memorizing of EEA/DCP
Lü Zhi, JI Shou-zhen, LI Bing-quan, XU Xiu-cheng
2001, 27(1): 9-11.
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The Character of Shape Memorizing of EEA/DCP was systematically studied. The results show that the concentration of DCP has great influence upon Shape-recovering rate, Shape-fixing rate, Shape-recovering temperature, Tensile strength and elongation at break. Furthermore, through the experiments, we ...
Sum-Difference Unified Design of Monopulse Ring-Focus Antenna
CHENG Zhen, Lü Shan-wei, JIANG Xin-fa
2001, 27(1): 12-15.
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The relatively poor performance of difference channel of a monopulse ring-focus antenna is accounted for, suitable aperture distribution functions are recommended, formulae of feed difference pattern needed are presented and sum-difference unified design method is put forward. To testify the theoret...
Interferometric SAR Phase Noise Reduction
XU Hua-ping, ZHOU Yin-qing, CHEN Jie, LI Chun-sheng
2001, 27(1): 16-19.
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The phase noise suppression methods applied on the interferogram of interferometric synthetic aperture radar(INSAR) are studied.Multilook average approach(low pass linear filter) is discussed,and the new concept of range and azimuth critical look number used in multilook approach is proposed and its...
Research on Real-Time Performance of Bandwidth Allocation for LTPB Network
ZHOU Qiang, XIONG Hua-gang, LUO Zhi-qiang
2001, 27(1): 20-23.
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The problem of guaranteeing real-time message transmission in LTPB network, linear token passing bus, has been studied. Bandwidth allocation for LTPB aims at real-time message transmission, and the key parameter, the minimum amount of time used for real-time message transmission in unit time, is an ...
Data Fusion of ADS-SSR in Air Traffic Management
ZHANG Xue-jun, ZHANG Qi-shan
2001, 27(1): 24-27.
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The application of Secondary Surveillance Radar (SSR) and Automatic Dependent Surveillance (ADS) have been applied in Air Traffic Management (ATM) system widely, especially in terminal domain. The characteristic and limitation of SSR and ADS in civil aviation are analyzed. The different affections o...
Multi-Resolution Multi-Model Tracking Algorithm Based on Model-Mixing
FAN Tao, YANG Chen-yang, LI Shao-hong, MAO Shi-yi
2001, 27(1): 28-31.
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A model-mixing approach has been introduced into the original multi-resolution multi-model algorithm and a new maneuvering target tracking algorithm based on multi-resolution multi-model method is proposed. The original algorithm adopts hard switching multi-model approach in the multi-resolution fra...
An Overview of Rotor Blades Optimum Design for Helicopter Vibration Reduction
XIANG Jin-wu, GUO Jun-xian, ZHANG Xiao-gu
2001, 27(1): 32-35.
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Helicopter vibration level has been a problem for many helicopter configurations. Due to the great practical importance of the problem a considerable amount of research has been aimed at various aspects of vibration reduction and control. This paper presents the results of a survey of rotor blades o...
Study on Reliability Testing of Four Redundancy Servo Control System
WANG Shao-ping, LI Pei-qiong, HE Jian-jun
2001, 27(1): 36-39.
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Abstract:
Because four redundancy servo control system is designed by limited life and high reliability, reliability testing base on exponential distribution is difficult to achieve the effect, which need large samples and long testing time. According to the failure mechanism of four redundancy servo control ...
Research on Tactic to Delivery Guided Bomb with Laser
PENG Ke-mao, SHEN Gong-zhang, WEN Chuan-yuan
2001, 27(1): 40-43.
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Abstract:
The tactic to delivery guided bomb with laser is researched, while the laser bundle is transmitted by the fighter itself, that is to delivery guided bomb with laser in non-wing-level and to egress in turning. The major is to egress in turning, which synthesizes tactical requirement to shoot the targ...
Numerical Simulation for Bent-Swept Blade in Designing Civilian Fan
LI Qiu-shi, LI Ling, LU Ya-jun
2001, 27(1): 44-47.
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It present a numerical method, based on 3-D incompressible steady time-averaged N-S equation and K-ε turbulence model equation, using in aerodynamic designing for high efficient civilian fan. The code was adopted limited volume method and was under the non-orthogonal curve coordinate by means of fam...
Affection of Valve Shape on Air Flow of S.I. Engine
LI Feng, ZHAO Qing, LUO Yun-jun
2001, 27(1): 48-50.
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Air motion inside the cylinder of engine plays an important role in the processes of fuel spray and combustion, determine the economy, power output, exhaust emissions and combustion noise of the engine. The multidimensional simulation of the flow in cylinder can give the flow field information in de...
Experimental Studies on Leading-Edge Vortex Breakdown and Control of Flow over 76°/40° Double Delta Wing
WANG Jin-jun, LIU Ji-ying, XUE Qi-zhi
2001, 27(1): 51-53.
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The flow visualization techniques has been used to investigate the effects of trailing-edge jets on the leading-edge vortex breakdown and its control of flow over a 76°/40° double Delta wing. The experimental results indicate that the trailing-edge jets can delay the leading-edge vortex breakdown ef...
Aerodynamic Analysis of Grid Fin-Body Configurations
SHEN Xia-ling, WANG Li-li
2001, 27(1): 54-56.
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Aerodynamic analysis is made for grid fin-body configurations in subsonic and supersonic flow. Vortex lattice formulation has been used in predicting the aerodynamic characteristics for grid fin in subsonic flow. An infinite line doublet and imaging vortices inside the body are employed to model bod...
Stealth Effect Calculation of Aircraft on Condition of Electrical Jamming
ZHANG Yun-fei, ZHANG Kao, HE Qing-zhi
2001, 27(1): 57-61.
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Abstract:
It was formulated that the calculation method of stealth performance of aircraft on condition of stand-off jamming and self-screening jamming. They were discussed the influence of various type of jamming and RCS on the stealth performance. The conclusions were made that the effective radiation power...
Analytical and Experimental Research of Ball-Bar Impact under Low Velocity
LI Min, ZHU De-chao
2001, 27(1): 62-65.
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The analytical and experimental investigations of low speed impact of a ball on a bar were reported. The impact tests, which were carried out by means of laser vibrometer, verified the Hertz contact theorem. It was also shown that, the analysis of low speed impact problem can really be reformulated ...
Analysis and Application of Forced Vibration of Piezoceramic
CHEN Wei-min, GUAN De, ZHU De-chao, LI Min
2001, 27(1): 66-68.
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The formula of the in-plane forced vibration of piezoelectric materials plates is presented based upon the fundamental piezoelectric equations, then a direct method of measuring the piezoelectric constant of piezoelectric materials is developed by combining the response formula of the in-plane force...
A General Theory for Elastic Damage
TANG Xue-song, JIANG Chi-ping, ZHENG Jian-long
2001, 27(1): 69-72.
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On the strict basis of irreversible thermodynamics, a general theory for elastic damage is developed. The approximations and limitations of the classical stress-strain constitutive equation based on the strain equivalence hypothesis are argued theoretically. The relations and differences of the exis...
Finite Element Analysis of Shape Memory Alloys Reinforced Composite Laminate
YE Ning, LI Zheng-neng
2001, 27(1): 73-75.
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The intelligent structure was made up by which the shape memory alloys (SMAs) be embedded in composite laminate.Applied by the loads or the variation of the temperature,the SMAs would change the distributing of the stress and strain of the structure and the shape of the structure.Because of the non-...
Integrated Aerodynamic-Stealth Optimal Design of Aircraft Configuration Parameters
LI Tian, WU Zhe, LI Jing
2001, 27(1): 76-78.
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Basing on the aerodynamic and RCS objectives,the geometrical parameters of the wing and tail planform and few geometrical parameters of fuselage are optimized．According to the requirements of the forth generation of fighter,the desirable and acceptable values of the objectives and constraints were d...
Optimized BLAS and Its Effect on Performance of Parallel Programs
LONG Xiang, LI Zhong-ze, CHEN Jin
2001, 27(1): 79-82.
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It is the trend of using SMP board as the compute node of a high performance system. The benefits of multithreading is discussed firstly and the BLAS3 is rewritten to get higher performance on a Dual Pentium II system. To investigate the relation between the performance of a single compute node and ...
On Design and Implementation of NET-RAM
LONG Xiang, LIAO Hong-bin, GAO Xiao-peng
2001, 27(1): 83-87.
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Abstract:
A NVM(Network Virtual Memory) system treats all the memories distributed on the network as the memory of a single node so that an application can take the advantage of much larger memory resources on the network. This is especially suitable for such applications which are not time-sensitive but need...
Non-Newtonian Effects on Ferrofluid Lubrication
CHI Chang-qing
2001, 27(1): 88-92.
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The load carrying capacity of the ferrofluid lubricating films can be controlled directly by means of the applied magnetic field, since the viscosity of the ferrofluid increases in the case of magnetic field. The experimental investigations showed that the ferrofluid is an non-Newtonian fluid: it be...
On Performance of Ferrofluid-Lubricated Plane Sliderin Uniform Magnetic Field
CHI Chang-qing
2001, 27(1): 93-96.
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The calculated results show that the performance of the ferrofluid-lubricated plane sliders is different obviously from the performance of plane sliders lubricated with Newtonian fluid or Bingham plastic. The yield stress causes the attached cores and increases the load carrying capacity of plane sl...
Using Genetic Algorithms to Solve Sub-Link-s Parameters of Flexible Link
WU Li-cheng, LU Zhen, YU Shou-qian, ZHENG Hong
2001, 27(1): 97-100.
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A genetic algorithm of real number type is used to solve the equations of the sub-link-s parameters when modeling a flexible robot manipulator with the sub-links approach. It is the key of successfully using the sub-links approach that how to solve the equations of the sub-link-s parameters. However...
Simulation Analysis on Kinematics and Force of Hexapod
GUO Zu-hua, CHEN Wu-yi, CHEN Ding-chang
2001, 27(1): 101-104.
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Hexapod is one example of a parallel connection mechanism. This paper simulates the movement of a hexapod, analyses the velocity and acceleration of the movable platform and the force acted on the rods. Inside a specific workspace, the cure of velocity and acceleration of the platform and the force ...
FEM Design of Cruciform Biaxial Tensile SpecimenBased on Limit Strain Analysis
FEM Design, YU Yong, WAN Min
2001, 27(1): 105-108.
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A cruciform biaxial tensile specimen with chamfer in arm and center region is designed by the method of finite element numerical simulation in order to realize the complex loading using cruciform biaxial tensile test and study the limit strains of sheet metals under the complex strain loading paths....
Fabrication of SIMOS/SOI CMOS IC-s
WEN Meng-quan
2001, 27(1): 109-111.
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SOI-SIMOX(Silicon On Insulator-Separation by Implanted Oxygen) materials were formed by large dose(1.5×1018/cm2) oxygen ion implantation into p-type (100) Si wafers at energy of 170keV and annealing in nitrogen at 1300℃ for 6 h.The carriers in the top silicon layers of the SIMOX are reversed from P-...
A New Associative Memory System via Tchebycheff Interpolation
YAN Shou-feng, LIU Zhong-kan, MAO Shi-yi
2001, 27(1): 112-116.
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A new high-order associative memory system via Tchebycheff interpolation is proposed. It offers the error-free approximation to multi-variable polynomial functions with arbitrarily given order. Tchebycheff interpolation nears to the best uniform approximation, this ensures theoretically the approxim...
Synchronous Motion of Center Symmetry Plane Three Connecting Rod
LEI Jin-zhi, GUAN Ke-ying
2001, 27(1): 117-120.
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Center symmetry plane three connecting rod is studied. This model can be used to describe the movement of satellite with symmetry solar pane in outer space with weak gravitation. Since the system is nonintegrable, in general, the movement of such system is complicated. The Lagrange motion equation o...
Research on Method of Circuits Tolerance Analyses Based EDA Technology
SHI Jun, KANG Rui
2001, 27(1): 121-124.
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The basic theory of tolerance analysis technology is discussed. The technology precept of circuits tolerance analyses and design based on the EDA software PSpice is given. The methods of Monte Carlo analyses and worst-case analyses are discussed in detail. Three aspects of the application fortoleran...

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