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2008 Vol. 34, No. 8

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Modeling and simulation of rapid transfer alignment for SINS
Gong Xiaolin, Fang Jiancheng, Guo Lei
2008, 34(8): 865-868.
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Abstract:
Aiming at the problem of rapid and accurate transfer alignment for the space weapon strapdown inertial navigation system (SINS), the error model of weapon SINS was established and the errors of inertial elements were considered. The attitude matching was selected, and the measurement equation of the...
Redundancy control of direct-drive-valve servo system
Yu Yongqiang, Guo Hong, Xie Zhanming
2008, 34(8): 869-872.
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Abstract:
A novel neural network adaptive sliding mode control strategy was proposed, which was applied to ensure tracking capability to direct-drive-valve (DDV) servo system in the presence of degrading redundancy. A radial basis function neural network (RBFNN) was adopted to realize sliding mode control. By...
Using the robust control method to control the vibration of piezoelectric laminated plates
Hu Juxi, Qiu Zhiping
2008, 34(8): 873-877.
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Abstract:
The piezoelectric laminated plate were researched, which posses the uncertain system parameters, and considering the steady-state behavior and transient performance of the piezoelectric laminated plate. On the foundation of the model deflation, the author used the robust controller to bring the piez...
Foreshowing study of dynamic environment on the sphere-cone-cylinder reentry vehicles
Hong Jie, Gao Jinhai, Ma Yanhong, Zhu Bin
2008, 34(8): 878-882.
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Abstract:
The stable and fluctuating pressure distribution on the surface of the sphere-cone-cylinder reentry vehicle was investigated in the supersonic and hypersonic flow field. Computation fluid explorer(CFX )was used to model the grid which had been analysis of three-dimension steady flow and unsteady flo...
Reliability assessment model and application for aero-engine based on criticality method
Wang Dawei, Ma Yanhong, Hong Jie
2008, 34(8): 883-886.
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Abstract:
The reliability assessment model based on criticality method was proposed for aero-engine reliability evaluation. Various aero-engine fault samples which affected the normal work were considered in this model. The entire appearance fault sample was classified by the targets of aero-engine safety, pe...
Analysis of the mechanics for ski-jump takeoff
Wang Weijun, Guo Linliang, Qu Xiangju
2008, 34(8): 887-890.
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The matching between parameters of ski-jump ramp and flying performance/quality of carrier-based aircraft was analyzed based on the dynamic process of force polygon and the effect of ski-jump ramp on the pitch rotation of aircraft, and the building-up mechanism of the angle of attack at the initial ...
Numerical prediction for the elastic properties of three dimensional and five directional braided composites
Li Diansen, Liu Zixian, Lu Zixing
2008, 34(8): 891-895.
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The finite element model is established based on the micro-structure of three dimensional and five directional braided composites and the assumption of the braiding yarn with the hexagon section and the axial yarn with the square section and the analysis of geometrical relationship of yarns in three...
Impacts of imperfect receivers on complex correlation of 2D aperture synthesis microwave radiometer
Zhao Feng, Miao Jungang, Wan Guolong, Xue Yong
2008, 34(8): 896-899.
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Abstract:
The impacts of receivers- rectangular frequency response imperfections on the complex correlation measurement of 2D aperture synthesis microwave radiometer were presented. These imperfections include center frequency imbalance, bandwidth imbalance, group delay imbalance, phase imbalance of local osc...
Effect of ice geometry to airfoil performance using neural networks prediction
Yuan Kungang, Cao Yihua
2008, 34(8): 900-903.
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The ice accretion geometric characteristics have complex effects on airfoil aerodynamic coefficients. By using levenberg-marguardt(LM) learn algorithm of back-propagation (BP) network, several neural networks were established to get correlations between typical glaze ice geometry (ice horn leading-e...
Application of new defected EBG structure in microstrip antenna
Lü Shanwei, Zhao Xiaoji, Feng Wenquan, Zhang Jianglin
2008, 34(8): 904-906.
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Abstract:
In order to meet some specific application requirements for microstrip patch antenna in navigation and communication project, a novel defected electromagnetic band-gap (EBG) and ground structure designed for improving the performance of traditional microstrip patch antenna was presented. For buildin...
Experimental investigation of kerosene supersonic combustion based on cavity flameholder
Wang Liao, Wei Baoxi, Zhang Chengliang, Xu Xu
2008, 34(8): 907-910.
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Abstract:
Experimental investigation of kerosene supersonic combustion was performed on direct-connect supersonic combustion test facility by using four different configurations of cavity flameholders and multi-diameter kerosene injectors. Kerosene equivalence ratio varies from 0.24 to 1.32 and polite hydroge...
Fabrication and electricity properties of metal covered acrylate rubber microspheres by electroless plating
Gao Dali, Zhan Maosheng
2008, 34(8): 911-915.
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Abstract:
Electroless copper plating on acrylate rubber (ACM) microspheres of micron scale was studied. By introducing a reaction control method, the continuously and uniformly covered ACM conductive microspheres with low density and core-shell structure were achieved. The morphology and composition of Cu coa...
Aging treatment of FeNiCr/NiAl-TiC composite coatings produced by thermit process
Wang Genlong, Xi Wenjun
2008, 34(8): 916-919.
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The FeNiCr/NiAl-TiC composite coatings were prepared by thermit reaction process in a carbon steel pipe. Using scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and energy dispersive spectrum (EDS), the microstructure of the composite coatings and e...
General formulas of coning compensation algorithm with angular rate input
Yang Sheng, Fang Jiancheng
2008, 34(8): 920-924.
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Abstract:
When the traditional coning compensation algorithm applied in the strapdown inertial navigation system (SINS), which comprises of angular rate gyroscopes, the algorithm error increased dramatically. The general formulas of coning compensation algorithm, taking arbitrary samples of angular rate signa...
Computer network defense policy model
Xia Chunhe, Wei Yudi, Li Xiaojian, He Wei
2008, 34(8): 925-929.
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Abstract:
Recent research on computer network defense is lack of a method which is able to model policy in high level and refine policy conveniently, hence computer network defense policy model (CNDPM) was presented to abstract network defense control behavior on the basis of organization based access control...
Link scheduler for network-on-chip
Zhang Zhe, Long Xiang, Gao Xiaopeng
2008, 34(8): 930-934.
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Abstract:
Wormhole-switching is usually employed in the emerging network-on-chip (NoC), in which the link scheduler can hardly guarantee the packet-level latency. Reverse anchored round-robin (RARR) is proposed as hybrid of the flit-by-flit round-robin (FFRR) and the packet-by-packet round-robin (PPRR). In th...
Least squares based recursive identification for stochastic systems with colored noises
Wang Dongqing
2008, 34(8): 935-939.
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Abstract:
An auxiliary model and least squares based recursive identification algorithm was presented for stochastic systems with colored noises. The basic idea is, by means of the auxiliary model identification principle and extended least squares identification theory, to replace the unknown variables in th...
Novel method of extraction for binary based on hardware
Lai Dayu, Liu Rongke
2008, 34(8): 940-943.
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Abstract:
A method of any order extraction, works from left to right, which is based on hardware and calculates out the most significant bit(MSB) of the result first and the least significant bit(LSB) last. While applied in field programmable gate array(FPGA), the method can combine with looking up table(LUT)...
Direct numerical simulations of turbulent channel flows with spanwise moving wall
Wan Xi, Ma Shuwei, Zhang Jinbai, Li Chunxuan
2008, 34(8): 944-947.
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Abstract:
The influence of spanwise moving wall on turbulent channel flows is investigated using direct numerical simulations(DNS), which in order to know the characteristics of turbulent channel flows when existing spanwise moving velocity. The DNS is performed using the standard spectral method. Three cases...
Model of satellite data transmission scheduling problem based on multi-satellite combined reconnaissance
Li Yunfeng, Wu Xiaoyue
2008, 34(8): 948-951.
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Abstract:
Satellite data transmission scheduling problem based on multi-satellite combined reconnaissance is such a problem that studies how to assign ground resources and data transmitting time for every single data transmission task belonged to satellite data transmission task.A study of the problem-s model...
Calculation model of infrared radiation of cruise missile and atmospheric attenuation
Mao Xia, Dong Xuyang, Diao Weihe
2008, 34(8): 952-955.
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Abstract:
Three primary radiant points of the cruise missile, i.e. fuselage, hot spot and plume were analyzed, and an infrared radiation calculation model of cruise missile was established. Secondly, synthetically considering various factors such as height, slope and weather conditions, the influence of atmos...
Three descriptions of coning motion and its influence
Yu Yang, Zhang Hongyue
2008, 34(8): 956-960.
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Abstract:
Basing on rotation vector method, Euler angles method and finite rotations method, the coning motion and its influence were discussed. Then the expressions of equivalent gyro drift in each method and their relationship were obtained. At last compensate precision of two-intervals coning compensate al...
Analogy performance of flow and heat transfer on the V groove surface
Liu Kun, Tao Zhi, Wu Hong, Wang Jiao
2008, 34(8): 961-963.
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Abstract:
The drag and heat transfer characteristics of small longitudinal V groove surfaces in the rectangular channel were investigated experimentally based on the Reynold analogy. Within the range of Reynolds number from 10 000 to 80 000, the experimental results indicated that the V groove surface of h=s=...
Kinematic analysis and simulation of saddle-back coping welding robot
Li Xiaohui, Wang Su
2008, 34(8): 964-968.
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Abstract:
Aiming at the special request of complicated intersection line robot welding, a kind of saddle-back coping welding robot was presented, which has five axes. The robot mechanistic structure was reduced essentially and rationally. The five-axis robot D-H (Denavit-Hartenberg) links- coordinates were es...
Online mining frequent closed itemsets over data stream
Liu Chun, Zheng Zheng, Cai Kaiyuan, Zhang Shichao
2008, 34(8): 969-972.
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Abstract:
Based on the algorithm LossCounting, a novel approach called LossyCounting_Closed(LC_Closed ) for mining closed frequent itemsets over data stream was proposed. A new summary data structure called Closed-Itemsets-forest (CI-forest) was developed for maintaining only closed frequent itemsets.The inse...
Research on failure rate model of lithium-ion batteries
Jia Ying, Li Huolin
2008, 34(8): 973-975.
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Abstract:
Base failure rate model and operating failure rate model were developed to predict the reliability of the lithium-ion batteries. Firstly, the mostly failure models of lithium-ion batteries were analysised, and the operating current and temperature were regarded as the main accelerating factors of th...
SVM based float car driving mode classification model
Zhu Tongyu, Guo Shengmin, Lü Weifeng
2008, 34(8): 976-980.
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Abstract:
There are two kinds of driving modes of float car at low speed. The misjudgement of these modes will affect the accuracy and efficiency of the calculation of float car real-time traffic conditions seriously. A SVM(support vector machine) based float car driving mode classification model was studied ...
Random vibration response analysis of hypersonic flight vehicle ramjet combustor chamber structure
Gao Jinhai, Ma Yanhong, Hong Jie, Liu Wei
2008, 34(8): 981-985.
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Abstract:
The testing results of combustion chamber structure of hypersonic ramjet were used, which finished the analysis to structure random vibration response of combustion chamber shell. Meanwhile, both of them were compared ,which gave us a satisfied consequence. The analysis and technology method of rand...
Numerical simulation of intersection line welding in installation pedestal on aeroengine combustion chamber
Wang Su, Zhou Feng, Zhang Yingli
2008, 34(8): 986-990.
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Abstract:
A numerical analysis modeling was created about the installation pedestal on aeroengine combustion chamber, which is one of the crucial parts of the aeroengine during the process of intersection line welding. Deformation caused by the intersection line welding at the joint between the two cylindrica...

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