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2005 Vol. 31, No. 06

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TSK-DRFNN and its constrained optimization algorithm
Xu Chunmei, Er Lianjie, Hu Hongjie
2005, 31(06): 595-598.
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A novel DFNN(dynamic fuzzy neural networks )based on TSK(Takagi-Sugeno-Kang) fuzzy model was presented to the nonlinear dynamic system. The DFNN was constitutive of static networks and dynamic networks. The static networks realized premise and defuzification part. The recurrent dynamic networks real...
Study of flow control over different noses with single hole microblowing
Sun Shuyuan, Deng Xueying, Zhan Huiling
2005, 31(06): 599-603.
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The SHM(single hole microblowing) as a new perturbation active control technique has been applied to the slender body with different model noses at zero sideslip and high angle of attack. The analyzed and contrasted results of the distribution of the surface pressure distributions and the sectional ...
Neural　network　gain scheduling　design for large envelope curve flight control law
Zhang Ping, Yang Xinying, Chen Zongji
2005, 31(06): 604-608.
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A 3-layer BP(back propagation) network is developed for the gain scheduling flight control law in a large flight envelope curve for a flight by wire flight control system. It can replace the traditional gain scheduling according to the altitude, Mach number or dynamical pressure which is only one-pa...
Software imitation for unmanned aerial vehicle landing scenes
Yang Peng, Wang Rui, Zhou Fuqiang, Zhang Guangjun
2005, 31(06): 609-613.
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Abstract:
To offer a cost-effective solution to the research of vision-guide algorithm for UAV(unmanned aerial vehicle) with vertical takeoff and landing capability, the imaging principle and imitation technology of UAV landing scenes based on the theory of machine vision was employed. The pinhole camera mode...
Study on measurement of relative motion of satellite formation flight
Li Chenguang, Han Chao
2005, 31(06): 614-617.
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In satellite formation flight, the measurement and determination of independent relative orbit is one of the most important techniques of formation flight. The traditional techniques of using star sensor, radar and GPS(global positioning system) signal to determine relative orbit are considered. Rel...
Multiple object anti-collision RFID technology with dynamic slot allocation
Wu Jing, Xiong Zhang, Wang Ye
2005, 31(06): 618-622.
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Abstract:
To identify multiple objects simultaneously assuming that the number of labels is not known in advance, multiple objects anti-collision RFID(radio frequency identification) technology and its application system model were presented. The collision solution in ISO/IEC15693 standard was improved, with ...
Novel closed loop system and output signal processing of digital Coriolis mass flowmeter
Zheng Dezhi, Fan Shangchun, Xing Weiwei
2005, 31(06): 623-626.
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Abstract:
In the processing of designing Coriolis mass flow measurement system, the novel digital method for processing the signals and calculating the results was introduced. The high performance parallel analog to digital converter (A/D) was utilized to sample the whole signals of the sensor. The sample dat...
Research on synchronistic multi-ignitions of hydrogen-oxygen resonance ignitor
Yu Nanjia, Zhang Guozhou, Song Yana, Cheng Shengqing
2005, 31(06): 627-631.
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Abstract:
New hydrogen-oxygen resonance igniter is designed to use in synchronistic multi-ignition for aerospike nozzle engine. Ignition start time, delay time, repetition of multi-ignition and lifetime of igniter are tested. It can be found from performance tests that the new hydrogen-oxygen resonance ignite...
Numerical dispersion analysis for 3 -D ADI-FDTD method using higher-order spatial difference
Zhang Yan, Lü Shanwei
2005, 31(06): 632-636.
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Attention was focused on the numerical dispersion property of 3-D ADI-FDTD (alternating-direction implicit finite-difference time-domain) method using the higher-order spatial difference. First, the iterative formulas of the numerical dispersion relation for the higher-order spatial difference were ...
Computation of fuel regression rate in classical hybrid rocket motors
Tian Hui, Cai Guobiao, Wang Huiyu, Zhang Zhenpeng
2005, 31(06): 637-641.
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Abstract:
The combustion characteristic in classical hybrid rocket motors has been studied. The heat transfer process in the gas and the solid fuel has been considered. Coupling computation is presented by the regression rate equations based on the heat transfer theory and the Arrhenius law. The regression ra...
Approach of calendar life extension for aircraft structures
Liu Wenting, Wang Zhongbo
2005, 31(06): 642-646.
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Abstract:
To extend service life of existing aircrafts approaching the end of their original life at the expiration of calendar life while fatigue life is far from running out due to low operation, a calendar life extension approach was proposed based on evaluating technique for life system of aircraft struct...
Some influencing factors of rotor vibratory loads prediction under high speed state
Wang Bo, Li Shu, Hu Jizhong
2005, 31(06): 647-651.
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Abstract:
Based on the rotor airflow environment and blades movement, which would be produced when the helicopter flighted forward with high speed. It was analyzed the influence on the hub vibratory loads prediction by unsteady aerodynamics model, dynamic stall model, induced-flow distribution, elasticity def...
Study on comprehensive evaluation of cockpit ergonomics and its application
Li Yinxia, Yang Feng, Wang Lijing, Yuan Xiugan
2005, 31(06): 652-656.
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Abstract:
Comprehensive evaluation of cockpit ergonomics plays key role in the new-type cockpit development. At previous period, during the development of aircraft cockpits, some judge standards were proposed in order to ensure design quality without allowing for ergonomics evaluation. There are not any appro...
Research on intelligent simulation modeling library of three-axis virtual flight motion simulator
Liu Zhenghua, Er Lianjie, Chen Jingquan, Wu Yunjie
2005, 31(06): 657-661.
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Abstract:
To solve intelligent and rapid design problem of model library of three-axis flight motion simulator, an advanced approach of intelligent simulation model library of virtual flight motion simulator was proposed, based on intelligent parametric design, genetic algorithm, virtual reality and Pro/Toolk...
Novel batched patch caching algorithm for streaming media
Qin Shaohua, Li Zimu, Cai Qingsong, Hu Jianping
2005, 31(06): 662-667.
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Abstract:
In distributed streaming media delivery system, an important topic is how to reduce the consumption of backbone network bandwidth. By deploying the proxy at the edge of network, it made response to a group of local clients’ request and forwarded the multimedia data streamed out of the server. An eff...
Integrated power and attitude control system based on VSCMGs for agile small satellite
Tang Liang, Xu Shijie
2005, 31(06): 668-672.
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Abstract:
The multi-projects attitude maneuver problem for ASSAT(agile small satellite) with VSCMGs(variable speed control moment gyros) as actuator was investigated. Under some limits, such as, the saturation of actuators, the requirement of attitude maneuver, the measurement and tracking ability of sensors,...
Analysis of observability and the degree of observability in autonomous celestial navigation
Ning Xiaolin, Fang Jiancheng
2005, 31(06): 673-677.
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Abstract:
The type of celestial measurement used in the autonomous celestial navigation system is one of the most important factors, which effect the precision of position determination greatly. There are two main celestial measurements. One is the angle between the lines of sight to a star and earth core. Th...
Modulus prediction of a polymer matrix composite reinforced with fly-ash hollow microspheres
Cao Feilong, Li Huanxi, Shen Zhigang
2005, 31(06): 678-681.
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Abstract:
Based on a self-consistent three-phase model and Mori-Tanaka theory, general expressions are deduced to calculate the effective volume modulus and the effective shear modulus of a composite containing several sorts of hollow microspherical reinforcements. Then, the effective modulus of a polymer mat...
Detection of underground cracks and thin weak layers using blasting vibration
Long Liping, Wu Yanfeng, Ding Hua, Fei Binjun
2005, 31(06): 682-685.
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Abstract:
By using the assertion that the propagated wave signal mainly comes from the natural vibration of geophysical structure after blasting, a new technique is proposed for detecting underground large scale cracks and thin weak layers. This technique indicates that the local stiffness decreases, owing to...
Analysis of the effects of microwave leakages on the accuracy of optically pumped cesium frequency standards
Pan Shunkang, Feng Keming, Wang Wei
2005, 31(06): 686-689.
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Abstract:
One of the major factors which effect the accuracy of optically pumped cesium frequency standards is caused by microwave leakages. Fourier transform is the major method to analyze the frequency offsets of small optically pumped cesium frequency standards, which is limited to analyze the case of atom...
Numerical simulation on lateral jet interaction in supersonic flows
Wen Jie, Zhao Guilin, Hu Liang, Peng Hui
2005, 31(06): 690-695.
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Abstract:
It was validated that Fluent can be used in numerical simulation on lateral jet interaction by comparing with the experimental results. Using Fluent, the lateral jet characteristics at different jet pressures and different angles of attack in supersonic flows is numerically investigated. The results...
Study of transistor steady-state operation life test by method of controllable junction temperature
Li Jihong, Jia Ying, Kang Rui, Zhang Dejun
2005, 31(06): 696-699.
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Abstract:
Analyzing the various problems of current steady-state operation life test standard, it is pointed out that, not measuring and controlling, transistor junction temperature in current transistor steady-state operation life test can lead to fatal inaccuracy of the test results. To increase the accurac...
QoS management model based on policy for grid application service
Yuan Man, Hu Jianping, He Rui, Ma Jian
2005, 31(06): 700-704.
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Abstract:
A quality of service(QoS) management model for grid is proposed by R.Al-Ali, the issues for grid QoS are divided into QoS of application layer, QoS of grid middleware and QoS of network layer. Research focus on expression for application layer service level agreement(SLA) by extending WSDL and optim...

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