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2005 Vol. 31, No. 11

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High precision fiber optic gyroscope based on Er-doped superfluorescent fiber source
Yang Yuanhong, Wang Zheng, Yi Xiaosu, Zhang Weixu
2005, 31(11): 1159-1162.
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Abstract:
For high precision fiber optic gyroscope application, high performance Er-doped superfluorescent fiber source was demonstrated and a practical prototype with 2.58×10-6℃ mean wavelength stability and less than 1% output power instability within -40℃~+60℃ was made with a cut-off type thin film filter ...
Research on motor-driven reverse bootstrap air cycle refrigerating system used on aircraft pod
Xiao Xiaojing, Yuan Xiugan
2005, 31(11): 1163-1167.
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Abstract:
Refrigerating system used on aircraft can provide refrigeration for electronic equipments. Because of the special characters of aircraft pod, there are many differences on framework and working theory between refrigerating system used on aircraft pod and the one used on normal aircraft. Several air ...
Simulation on cooling system and fuzzy control of BEPC’s beam pipe
Ning Xianwen, Pang Liping, Wang Jun
2005, 31(11): 1168-1171.
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Abstract:
A lot of synchronous radiate heat is generated when beijing electron positron collider operating. The heat is dissipated by the beam pipe’s cooling system. According to the key problem of cooling the beam pipe, an active cooling system based on modular form was developed. In order to investigate the...
One method solving parameter estimation of varying stress accelerated life test
Yuan Zhongkui, Wang Shaoping
2005, 31(11): 1172-1176.
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Abstract:
The maximum likelihood function of varying stress accelerated life is a nonlinear multi-dimension complex object function with five evaluated parameters, whose parameter estimation is easy to get into local optimization with grads descending algorithm while has low searching efficiency with global o...
New algorithm for constrained control direct allocation
Li Weiqi, Wei Chen, Chen Zongji
2005, 31(11): 1177-1180.
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Abstract:
A new algorithm for the direct allocation method named "adjacent facets searching algorithm "was presented to solving the three-objective constrained control allocation problem. The key problem of direct allocation method is to determine the intersection of the desired objective vector with the conv...
Design and determination for the front fed Cassegrain compact range
Chen Haibo, He Guoyu
2005, 31(11): 1181-1184.
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Abstract:
In theory, simulation and experiment, it was proved that the cross-polarization is eliminated in geometric-optics condition when the geometries ofthe front fed Cassegrain compact range satisfy the Mizugutch condition. The optimization rule on the layout and serration of the compact range was referre...
Surface mesh generation for surface models by 2D conforming delaunay triangulation
Li Jigang, Yang Qin, Meng Xianhai, Chen Qiming
2005, 31(11): 1185-1189.
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Abstract:
An approach to the generation of unstructured surface meshes for surface models was presented. The only assumption is that each patch of input surface model can be treated as a single-valued function by properly specifying the projection plane. To mesh a patch of the surface model, 2D conforming Del...
Object’s velocity effect on pulse to pulse frequency shifting RCS measurement
Peng Gang, Liang Yi, Wang Zhenrong
2005, 31(11): 1190-1193.
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Abstract:
Object's radial velocity effect on object’s radar cross section (RCS) outdoor measurement with pulse to pulse frequency shifting radar was researched. The cause of object's radial velocity make RCS measurement results inaccurate were analyzed from the aspects of object-imaging's position shifting an...
Analysis of turbine flow field under low Reynolds number condition
Yang Lin, Feng Tao, Zou Zhengping, Li Wei
2005, 31(11): 1194-1197.
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Abstract:
The flow field in turbine was investigated using three-dimensional numerical simulation method. The flow structures in different altitude were compared and analyzed, to show the effect on flow structure and turbine performance with the decrease of Reynolds number. The results indicate that on the co...
Multiple faults diagnosis approach for nonlinear system
Song Hua, Zhang Hongyue, Wang Xingren
2005, 31(11): 1198-1203.
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Abstract:
A new method for multiple faults diagnosis of nonlinear systems based on fuzzy parity equation was presented. This approach can be used to detect and identify the fault models when there are several kinds fault such as actuator fault and sensor fault simultaneously in the system. Fully decoupled par...
Image processing algorithms for uneven heating in infrared thermographic NDT
Guo Xingwang, Shao Wei, Guo Guangping, Liu Yingtao
2005, 31(11): 1204-1207.
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Abstract:
In infrared thermographic non-destructive testing, to reduce the effects of non-uniform heating and increase defect contrast and inspection depths, the thermal image sequence processing algorithms were studied based on the pulsed thermography of carbon fibre reinforced plastic samples. The factors t...
Detection of SS signal cyclic spectrum based on AO technique
Wang Danzhi, Shao Dingrong, Li Shujian
2005, 31(11): 1208-1211.
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Abstract:
The spread spectrum (SS) signal modulated by pseudo noise code is typically cyclostationary (CS) signal. Based on the spectral correlation theory of CS signal, a cyclic spectrum detection method of SS signal using acousto-optic (AO) signal processing technique was presented. The cycle frequency and ...
First-order D-type iterative learning control for a class of nonlinear systems
Song Zhaoqing, Mao Jianqin
2005, 31(11): 1212-1216.
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Abstract:
The design scheme of the classical D-type iterative learning control law depends on the relative degree of the controlled systems. In order to solve this problem and the problems of the gain of relative degree, and of the higher-order differential operation, a first-order D-type iterative learning c...
Tree structured hybrid filter banks based on power complementary pairs
Liu Zhiyu, Lin Maoliu
2005, 31(11): 1217-1221.
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Abstract:
A near-perfect reconstruction tree-structured hybrid filter bank (HFB) was presented. The analog analysis filters to analyze input signals are not the low-pass, band-pass or high-pass filters designed by using conventional methods, but the tree-structured analog filters based on power complementary ...
Performance loss analysis on aerospike nozzles
Ju Chunguang, Liu Yu, Han Fei
2005, 31(11): 1222-1225.
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Abstract:
The performance of the aerospike nozzles is influenced by many factors. To identify how much influence each factor work on the performance loss, the major factors were analyzed, including the boundary layer losses, the chemical kinetic losses, the truncated losses and the base losses, as well as the...
Study on fast synchronization of hybrid DS/FH system
Zhang Bo, Shao Dingrong, Li Shujian
2005, 31(11): 1226-1231.
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Abstract:
For a hybrid DS (direct sequence) /FH (frequency hopping) spread spectrum system, a fast synchronization method was proposed. Synchronization include two processes: acquisition and tracking. In the process of acquisition, a fast frequency identification method was used to realize the hybrid DS/FH sy...
Parallel multi-objective genetic algorithm by adding area penalty
Li Changlong, Cheng Peng, Chen Xiaobo, Chai Xudong
2005, 31(11): 1232-1236.
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Abstract:
One challenge for multi-objective genetic algorithm (MOGA) is the computational cost when MOGAs were used in the multidisciplinary optimization (MDO) problems. To improve the efficiency of MOGA, a new parallel algorithm was suggested. All the individuals were distributed among processors equally, an...
Set membership identification algorithm of nonlinear systems
Chai Wei, Sun Xianfang
2005, 31(11): 1237-1240.
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Abstract:
A new set membership identification algorithm was proposed for the robust identification problem of nonlinear dynamic systems with unknown but bounded noises. Radial basis function (RBF) networks were used to approximate unknown nonlinear dynamic systems utilizing their approximation ability accordi...
Connection-level network traffic model based on wavelet
Hong Fei
2005, 31(11): 1241-1244.
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Abstract:
Recent research shows network traffic exhibits drastically different statistics according to scales, including one component holding most traffic and being mostly Gaussian and the other absorbing virtually all the small scale bursts. For better understanding of this phenomenon, wavelet for multiscal...
Ontology based resource management platform design and implementation
Zhu Lijun, Chen Qian, Liu Hui, Huang Xiaoyun
2005, 31(11): 1245-1249.
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Abstract:
To solve the lacking content based analysis problem on volumes of domain information resource, a domain ontology based information resource management platform trial system was designed and implemented. Costume ontology(CO) was created to represent domain concepts and the relationship between concep...
Numerical simulation of infrared characteristics of liquid rocket plume
Zhang Xiaoying, Zhu Dingqiang, Xiang Hongjun, Cai Guobiao
2005, 31(11): 1250-1253.
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Abstract:
The infrared characteristics of liquid rocket plume, in spectrum 2~5 μm, was calculated using integral method of radiation transfer equation. The absorption of air at sea level was considered. The temperature and mole fraction of components in the cylindrical plume vary in axial and radial direction...
Two-segment information fusion attitude determination method for spacecraft from vector observations
Yu Yanbo, Fang Jiancheng
2005, 31(11): 1254-1258.
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Abstract:
The low precision characters of the integrated inertial/stellar attitude determination system consists of MEMS (micro electromechanical systems) gyros and CMOS APS star sensor. For this question, the methods of attitude determination from vector observations which suitable for this system were studi...
Design of active integrated probe-fed receiving antenna
Su Donglin, Xiao Yongxuan, Wang Guizhen
2005, 31(11): 1259-1263.
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Abstract:
In order to improve the gain and sensitivity of the receiving antenna system, one scheme on how to design active integrated receiving antenna was adopted in the receiving antenna and radio frequency front end system, which can bypass the traditional impedance matching network between the active circ...
Design of workflow-based integrated quality management system
Li Qing, Zhao Meng, Wen Jingqian
2005, 31(11): 1264-1268.
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Abstract:
To address the problem of lacking process management in a function-orientedquality management system, an integrated quality management system was designed by taking advantage of process management, control, and reconfiguration supported in the workflow technology. The principal contribution is to pr...

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