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2010 Vol. 36, No. 12

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Flexible spacecraft attitude control based on perturbation method analysis
Cui Meiyu, Xu Shijie, Jia Yinghong
2010, 36(12): 1387-1391.
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In order to achieve flexible spacecraft high precision attitude control, using the perturbation method, the dynamic equations were divided into the zero order and first order systems. For the zero-order nonlinear time-invariant systems, taking into account the inertia uncertainty and disturbance, th...
Hard real-time multichannel scheduling design in avionics WDM networks
Zhou Li, Ding Fan, Xiong Huagang
2010, 36(12): 1392-1395.
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For avionics hard-time network, a composited wavelength division multiplexing (WDM) structure based on broadcasting network and wavelength routing network and scheduling structure model were proposed. For the hard real-time messages in the multichannel networks, a load ratio round-robin schedule met...
Factors analysis of satellite images based on structure of clouds
Zheng Hong, Wu Xinghua, Cao Qiong, Li Wenqing
2010, 36(12): 1396-1399.
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To study the classification of satellite images availability, the description about the structural characteristics of clouds by coverage rate, thickness and fragment of clouds based on image information was proposed. The influence of these structural characteristics to satellite images availability ...
Sliding mode variable structure control of flutter suppression for two-dimensional wing
Song Chen, Wu Zhigang, Yang Chao
2010, 36(12): 1400-1403.
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Active flutter suppression (AFS), an attractive branch of aeroelasticity, and playing an important role of aircraft design was conducted on a two-dimensional wing which had a tailing-edge control surface. Sliding mode control (SMC) for AFS and its feasibility were investigated theoretically. The bas...
Application of constraint force equation method for missile launching dynamics modeling
Zhang Kenan, Chen Wanchun
2010, 36(12): 1404-1406,1426.
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A missile launching dynamics model based on the constraint force equation (CFE) method was presented, by applying the constraint equations and joint degrees of freedom in traditional launching dynamics equations. An incline launching missile system was researched, the missile body and the launching ...
Fault tolerance of parallel manipulator with actuation or structure redundancy
Yan Caixia, Zhan Qiang, Lu Zhen
2010, 36(12): 1407-1411.
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Abstract:
The fault tolerance approaches for actuator fault of parallel manipulator by using actuator redundancy were researched and the fault tolerance approaches with structure redundancy for the joint fault of parallel manipulator were discussed. According to the multiplicity of torque distribution in redu...
Real time scheduling algorithm based on rate-guaranteed in AFDX switch
Zhang Yongtao, Huang Zhen, Xiong Huagang
2010, 36(12): 1412-1416.
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Real time scheduling algorithm used in avionics full duplex switched Ethernet (AFDX) switches was studied, which is a key technique in AFDX. A priority real time scheduling algorithm based on rate-guaranteed(PRTRG) was proposed. Real time performance of PRTRG was analyzed using network calculus theo...
Design theory of thrust vector control servo mechanism for a type of spacecraft
Lu Hao, Li Yunhua, Zhu Chenglin
2010, 36(12): 1417-1421.
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Addressing the requirements of servo mechanism applied in a certain type of spacecraft, one servo mechanism for thrust vector control was designed. By comparing hydraulic servo mechanism,pneumatic servo mechanism and electric servo mechanism, their characteristics were obtained and the electric serv...
Method of scale extension in distributed virtual environment under CS structure
Zhang Jiong, Lei Xiaoyong, Dai Shuling
2010, 36(12): 1422-1426.
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According to the client server(CS) architecture in distributed virtual environment(DVE), it extended the problem of scale extension into the optimization of node partition between multi-node and multi-server. An evaluation equation of the node partition was also proposed. Based on the characteristic...
Effect of cyclic hygrothermal environment on interfacial property of CCF300/BMI composites
Feng Tongbo, Zhao Yan, Luo Yunfeng, Zhang Zuoguang
2010, 36(12): 1427-1431.
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An experimental investigation was conducted in order to study the effect of cyclic hygrothermal environment on the interfacial property of CCF300/5428 composites. The moisture weight and interlaminar shear strength(ILSS) of CCF300/5428 specimens of each stage during three absorption-desorption cycli...
Distributed cooperative guidance for multiple heterogeneous networked missiles
Zou Li, Ding Quanxin, Zhou Rui
2010, 36(12): 1432-1435.
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Abstract:
A distributed leader-follower heterogeneous multi-missiles cooperative guidance law was proposed based on local nearest-neighbor communication. The distributed local communication topology between the missiles was modeled using the graph-theoretic methods. The relations between the communication top...
Airflow thermal simulation and comfort evaluation of commercial airliner
Wang Lijing, Wang Zhaoxin, He Xueli
2010, 36(12): 1436-1439,1452.
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Abstract:
Air velocity field and temperature field of cockpit will affect the pilots- thermal comfort and performance directly, which are important parts need to be considered in the design of cockpit structure and environmental control system. After full-size three-dimensional model of B737-800 cockpit being...
Schottky diodes mixing performance evaluation in terahertz band
Fan Guoli, Jiang Yuesong
2010, 36(12): 1440-1443.
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Abstract:

Schottky diodes mixing performance can decrease as high-frequency effects in terahertz band. The finite difference technique was used to calculate the electromagnetic field within the diode chip and the influence of high-frequency effects on mixing performance was analyzed from the shunting of the j...
Structure parameters field calibration of fly point scanning shape measurement system
Li Xudong, Cui Lei, Jiang Hongzhi, Zhao Huijie
2010, 36(12): 1444-1447.
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The calibration of structure parameters of a triangulation-based fly point scanning shape measurement system is usually a non-linear problem. A practical and easy-to-use calibration procedure of such system was proposed and implemented. The proposed calibration procedure was based on the coordinate ...
On-line compensation technique for micromechanical gyroscope random error
Yuan Gannan, Liang Haibo, He Kunpeng, Xie Yanjun
2010, 36(12): 1448-1452.
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Abstract:
To improve the measurement precision of micro electro mechanical system (MEMS) gyroscope, an on-line compensation approach for MEMS gyroscope random error was presented. The autoregressive moving average (ARMA) model of random error was established under static condition, and the fictitious noise co...
Variable structure control for variable pump controlling variable motor
Wang Yan
2010, 36(12): 1453-1456.
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Abstract:
Variable structure control for variable pump controlling variable motor (VPCVM) systems based on feedback linearization was presented to overcome the defects, such as huge overflow losses, slow speed regulating and poor full capacity utilization, arisen from the conventional independent control of v...
Endmember extraction method based on morphology and orthogonal subspace projection
Li Na, Zhao Huijie
2010, 36(12): 1457-1460.
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Abstract:
An automatic endmember extraction method based on the extended morphology and the orthogonal subspace projection was proposed to solve the problems, including identification of different endmembers with similar spectra and the endmembers extraction used by the spectral or spatial information only. E...
New 3-D separation structure in juncture flows
Wang Xuee, Zhang Hua, Wang Hong, Fu Liqun
2010, 36(12): 1461-1464,1479.
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Abstract:
A computational and particle image velocimetry(PIV) experimental study of three dimensional steady separation structure generated in juncture laminar flows was presented. It confirms the existence of outmost attachment saddle point structure of horseshoe vortex in juncture flows. The outmost streaml...
Ground target tracking method research based on adaptive estimation for electro-optical platform
Zhang Jing, Wang Honglun, Gai Wendong
2010, 36(12): 1465-1468.
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Abstract:
A harmful effect on stability and tracking accuracy of the system was produced by the time-delay of tracker in an image-based target tracking system. Analyzing the ideal control command of the electro-optical platform servo system, a delay compensation method based on adaptive estimation was propose...
Efficiency analysis and thermal-hydraulic modeling of aerial piston pump at whole work condition
Li Yonglin, Xu Haojun, Cao Keqiang, Hu Liangmou
2010, 36(12): 1469-1472.
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Thermal-hydraulic model of aerial piston pump was established based on analysis of power loss and heat transfer. Power loss model of pump was obtained, considering the influence of load pressure, input rotational speed, swash plate angel and oil viscosity. With the analysis of heat transfer in pump,...
Object-FMA based software code inspection approach
Huang Baiqiao, Zhang Hong, Lu Minyan, Li Zhen
2010, 36(12): 1473-1479.
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There are two disadvantages in the checklist used in traditional code inspection: there is no mapping mode from code to the defect record of checklist, and the defect modes in the checklist is incomplete which may result in omitting the code defects in code inspection. To resolve the above two probl...
Molding surface design of membranous disc couplings based on fatigue life analysis
Li Lin, Fan Yu
2010, 36(12): 1480-1484.
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A membranous disc coupling design method was proposed based on the standpoint of fatigue life analysis, to select and evaluate the molding surface function at a given operating condition. The method of modeling membranous disc in finite element method(FEM) was discussed, and the boundary conditions ...
RMS research based on three dimension model of support system with simulation method for military aircraft
Li Jinzhuo, Wang Naichao, Ma Lin
2010, 36(12): 1485-1489.
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Abstract:
The issue of how to obtain reasonable reliability, maintainability and supportability (RMS) design parameters in the development of military aircraft was researched.The framework of RMS design parameters simulation model was constructed via the three-dimensional model of support system and the rule ...
Novel approach to video object detection and precise segmentation
Zhao Wenzhe, Qin Shiyin
2010, 36(12): 1490-1494.
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Taking into account multiple objects detection in dynamic video scene, a method based on variational optimization of optical flow and mean shift was proposed. A variational optimization model for optical flow field was built according to constraints of multiple objects detection in dynamic video sce...

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