Advanced Search

2005 Vol. 31, No. 09

  Previous Issue | Next Issue 
Display Method:
Web-based collaborative process digital definition of complex mechanical product
Meng Biao, Lin Nan, Fan Yuqing, Chen Kun
2005, 31(09): 939-943.
Abstract References Relative Articles Resource File Access Statistics iconViews 3181 iconDownload 843
Abstract:
Process digital definition is one of the critical tasks in process management and product definition. In order to standardize the content and methods of process digitization, the scope, the detailed content and its definition method were established based on computer aided process engineering resear...
Numerical simulation of wake impacting effect of axial flow compressor
Hou Anping, Xiong Jinsong, Zhou Sheng
2005, 31(09): 944-948.
Abstract References Relative Articles Resource File Access Statistics iconViews 2668 iconDownload 923
Abstract:
By giving accurate inlet boundary condition of rotor to simulate the interaction between rotor and stator, the result of 3D unsteady numerical simulation to a row of rotor’s flow field can reflect the effect induced by upstream unsteady wakes. Because the number of rotor’s blades and stator’s blades...
Modified PASTd algorithm and its application in large-scale adaptive antenna arrays
Lü Shanwei, He Ningrong
2005, 31(09): 949-952.
Abstract References Relative Articles Resource File Access Statistics iconViews 2743 iconDownload 800
Abstract:
Projection approximation subspace tracking with deflation (PASTd) algorithm belonging to eigen-decomposition algorithm was widely used in adaptive beam forming for antenna array. However, it has been found that this algorithm can only work satisfactorily when the signal to noise level is low. In ord...
Dynamics modeling and simulation analyzing for strapdown antenna stable platform
Zhou Ruiqing, Lü Shanwei, Liu Xinhua
2005, 31(09): 953-957.
Abstract References Relative Articles Resource File Access Statistics iconViews 4642 iconDownload 1135
Abstract:
In space constrained tactical missiles, the size of seeker antenna servomechanism was restricted strictly, and rate gyroscope stabilization platform failed to work very well. The strapdown stabilization technique can be applied to stabilize line-of-sight(LOS). Based on configuration feature and stab...
Cold-flow tests on 1-cell 2D linear plug nozzle
Liao Yunfei, Liu Yu, Wang Changhui
2005, 31(09): 958-962.
Abstract References Relative Articles Resource File Access Statistics iconViews 3066 iconDownload 780
Abstract:
To know more altitude compensation and base characteristics of plug nozzle, cold-flow tests on 1-cell 2D linear plug nozzle, which utilize high pressure air as propellant were conducted. The effects on 1-cell 2D linear plug nozzle of base wall and base bleed ratio were studied. The pressure distribu...
Simulation of effect of air-to-air missile on operational effectiveness of fighter
Liu Xingwei, Zhu Rongchang, Xiang Jinwu
2005, 31(09): 963-965.
Abstract References Relative Articles Resource File Access Statistics iconViews 3126 iconDownload 939
Abstract:
Effect of quantity, performance and flexibility of air-to-air missile on airfight effectiveness was analyzed, and effective manner to use air-to-air missile in air action was discussed to improve fighter’s survivability and its airfight effectiveness. Three degrees of freedom particle kinetic equati...
Half-scan mode for industrial CT
Fu Jian, Lu Hongnian
2005, 31(09): 966-969.
Abstract References Relative Articles Resource File Access Statistics iconViews 3228 iconDownload 1470
Abstract:
Industrial computed tomography (ICT) adopts generation III scan mode to execute the rapid test of objects. However, generation III has the small filed of view limited by the length of the detector. It is difficult to test the large objects rapidly. In order to realize the rapid ICT test of large obj...
Optimal low-IF quadrature architecture for microwave amplitude and phase receivers
Dong Yuliang, He Guoyu
2005, 31(09): 970-974.
Abstract References Relative Articles Resource File Access Statistics iconViews 2805 iconDownload 1011
Abstract:
To solve the problem of frequency offset out of intermediate frequency(IF) bandwidth for microwave and millimeter wave amplitude and phase receivers, an optimal architecture of low-IF quadrature receiver combining with double-sideband suppressed-carrier(DSBSC) was presented. The frequency error canc...
Exact trajectory tracking control of automatic landing
Che Jun, Zhang Xinguo
2005, 31(09): 975-979.
Abstract References Relative Articles Resource File Access Statistics iconViews 2802 iconDownload 1060
Abstract:
The problem of trajectory exact output tracking of non-minimum phase aircraft plant in automatic landing process was studied. The characteristic of aircraft automatic landing process was analyzed. Combined with a feedback controller, the stable inversion control method was adopted to design the auto...
Active control of dynamic response of a piezoelectric adaptive truss structure: modeling and experiment
Duan Yong, He Linshu
2005, 31(09): 980-984.
Abstract References Relative Articles Resource File Access Statistics iconViews 2961 iconDownload 742
Abstract:
An active control method of a piezoelectric flexible adaptive truss structure was presented to develop high performance structural systems with dynamic vibration, which can be used with smart actuators and sensors to control the shape and suppress the vibration of the flexible adaptive truss structu...
Space heat flux calculation of extravehicular space suit
Qiu Yifen, Yuan Xiugan, Chen Yonghua
2005, 31(09): 985-988.
Abstract References Relative Articles Resource File Access Statistics iconViews 3246 iconDownload 768
Abstract:
Space radiation heat transfer and heat flux through extravehicular spacesuit must be solved for the design of the spacesuit passive thermal protection. Characteristic of space heat exchange and performance of the vacuum shielding thermal insulation layer for the extravehicular spacesuit were analyze...
Using neural network inverse control system to improve the performance of turbo decoding
Dong Zhenghong, Zhou Hui, Zhu Renfeng
2005, 31(09): 989-993.
Abstract References Relative Articles Resource File Access Statistics iconViews 3449 iconDownload 856
Abstract:
To solve inverse decoding model problem of turbo codes, an adaptive inverse turbo decoding model was proposed, based on neural network nonlinear filter. Desired coefficients attenuation of cross-entropy (CE) was gotten by using optimal constant scaling factor with statistical principle. The auto-reg...
Experimental investigation on the effects of the height of distant canard wing of a forward-swept configuration
Zhan Jingxia, Wang Jinjun
2005, 31(09): 994-998.
Abstract References Relative Articles Resource File Access Statistics iconViews 3542 iconDownload 856
Abstract:
Force measurement in a low speed wind tunnel was conducted to investigate the effects of the height of a distant canard wing on the longitudinal aerodynamic characteristics of a forward-swept configuration. The Reynolds number is about 1.44×105 based on the average chord length of forward-swept main...
Identification system to dynamic characteristics of on-orbit space vehicles
Zhao Shougen, Cheng Wei, Sun Guojiang, Tang Yingqian
2005, 31(09): 999-1003.
Abstract References Relative Articles Resource File Access Statistics iconViews 3255 iconDownload 988
Abstract:
Based on the structure identifiability, some frequency-domain technologies using the free dynamic response of the structure were discussed. Including the hardware system which consists of the sensors, The data acquisition equipments, the computers and the identification software which was developed ...
Experiment of heat transfer within a rotating ribbed serpentine passage in unsteady cases
Deng Hongwu, Tao Zhi, Xu Guoqiang, Ding Shuiting
2005, 31(09): 1004-1008.
Abstract References Relative Articles Resource File Access Statistics iconViews 2860 iconDownload 1066
Abstract:
Experiments were conducted to study the heat transfer characteristics of a rotating ribbed square serpentine passage for unsteady cases. Abundant experimental data were obtained to investigate the variation of heat transfer coefficient at different engine working conditions, such as mass flux and ro...
Numerical simulation of stationary plasma thruster plume
He Bijiao, Zhang Jianhua, Cai Guobiao
2005, 31(09): 1009-1013.
Abstract References Relative Articles Resource File Access Statistics iconViews 3015 iconDownload 1160
Abstract:
Using 2D axisymmetrical model, a hybrid particle-fluid model was used to model plasma dynamics of the stationary plasma thruster (SPT) plume, which includes the particle in cell (PIC) method and the direct simulation Monte Carlo (DSMC) method. The randomly sampled frequency (RSF) method was applied ...
Synthesis of the array’s amplitude and phase pattern using genetic algorithm
Lü Shanwei, Han Yanju, Wang Wei
2005, 31(09): 1014-1017.
Abstract References Relative Articles Resource File Access Statistics iconViews 2688 iconDownload 1378
Abstract:
The element excitation relationships were analyzed respectively when the array patterns are symmetric, real or symmetric and real. Then genetic algorithm(GA) was introduced, and it was applied to synthesize array patterns. GA is an adaptive and global optimizing probability search method.It directly...
Transfer function model on X-ray digital radiography system
Liang Lihong, Lu Hongnian
2005, 31(09): 1018-1021.
Abstract References Relative Articles Resource File Access Statistics iconViews 3078 iconDownload 1135
Abstract:
Currently, industry X-ray digital radiography system based on the amorphous silicon X-ray flat-panel detector is the latest test technology. The system transfer function, namely point spread-function (PSF) consists of system geometry dispersion caused by nonpiont-source, scintillator screen dispersi...
Organization mode of NC workshop in network manufaturing
Lin Nan, Meng Biao, Fan Yuqing, Chen Kun
2005, 31(09): 1022-1026.
Abstract References Relative Articles Resource File Access Statistics iconViews 2804 iconDownload 678
Abstract:
Based on the analysis of the basic characters and connotations of network manufacturing, an enterprise running mode oriented to networking manufacturing system was put forward. Some problems existing in organization mode were discussed according to the reseach in a large scale aviation enterprise NC...
Method of damage mechanics to determine the p-S-N curve of material
Bai Zhaoyu, Meng Xianhong, Zhang Xing
2005, 31(09): 1027-1030.
Abstract References Relative Articles Resource File Access Statistics iconViews 3410 iconDownload 879
Abstract:
High reliability is required in the structures of aero planes, it is necessary to determine the probability fatigue curves of materials. It is well known that it is very expensive and takes numerous time to obtain probability fatigue curves by fatigue tests. Due to this situation, by means of the me...
Effect of plenum chamber total pressure on arcjet thruster operation
Xiao Yingchao, Tang Haibin, Liu Yu
2005, 31(09): 1031-1035.
Abstract References Relative Articles Resource File Access Statistics iconViews 2893 iconDownload 791
Abstract:
To investigate effect of plenum chamber total pressure on arcjet thruster operation, numerical simulation of operation under various plenum chamber total pressures was performed on the basis of mechanism analysis on its operation and modeling for chemical non-equilibrium flow and steady state electr...
Design and realization of multiplex telemetry signal simulate source based on CompactPCI bus
Feng Wenquan, Zhang Xiaolin
2005, 31(09): 1036-1039.
Abstract References Relative Articles Resource File Access Statistics iconViews 2637 iconDownload 1052
Abstract:
Performace of compact peripheral component interconnect (CompactPCI )bus and other industrial buses were compared and analyzed, some key technolgies in research and implementation of multiplex telemetry signal simulate source based on CompactPCI bus were introduced, the software interface of simulat...
Design and implementation on UDDI-based application service center
Ma Xiaoxuan, Huai Jinpeng, Wang Zhihu
2005, 31(09): 1040-1044.
Abstract References Relative Articles Resource File Access Statistics iconViews 2624 iconDownload 1459
Abstract:
Web Service is the key technical foundation of Web-based distributed computing and application at present. Universal description, discovery and integration(UDDI) is the key technical standard of Web service, which provides the standard of Web service’s register and discovery and solves the problem o...
Simulating turntable control system with neural network
Pei Zhongcai, Yin Li, Wang Zhanlin
2005, 31(09): 1045-1048.
Abstract References Relative Articles Resource File Access Statistics iconViews 2587 iconDownload 919
Abstract:
To solve the turntable uncertain partial load and friction disturbance, a turntable control system was designed with neural-proportion-integral-differential (PID) theory. Because of the learning capacity of neural network, the control system showed adaptive capacity to the load disturbance. The basi...

Copyright © Journal of Beijing University of Aeronautics and Astronautics

Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@buaa.edu.cn

Supported by: Beijing Renhe Information Technology Co., Ltd.