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2010 Vol. 36, No. 7

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Interaction between lunar rover wheel and simulant lunar soil by experiment
Sun Peng, Gao Feng, Yao Shengzhuo, Li Wen
2010, 36(7): 757-761.
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Abstract:
A tractive performance test-bed for wheel of planetary rover was designed and manufactured. Lunar soil simulation for wheel-soil experiment was prepared. Preparation of the lunar simulation on soil-bin was accomplished and mechanical properties of the in-situ lunar soil were remodeled. Tractive perf...
Quaternion unscented Kalman filtering for ultra-tight integration
Yuan Gannan, Zhang Tao
2010, 36(7): 762-766.
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Abstract:
Concerning the problem of the ultra-tightly coupled global positioning system/strapdown inertial navigation system (GPS/SINS) degraded in high dynamic and weak signal environments for linear filter, a quaternion unscented Kalman filter method was proposed. Firstly, analyzing the relationship between...
Micro-satellite attitude control real-time simulation based on mono-axis air-bearing table
Wang Xinsheng, Han Jianbin, Liang Bin, Li Jiyong
2010, 36(7): 767-770.
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Abstract:
Micro-satellite attitude control real-time simulation was studied based on the mono-axis air-bearing table, which was supported by a micro-satellite project. The hardware structure of the micro-satellite air-bearing table was introduced and the software architecture for the simulation system was des...
Torch pose fitting for intersection line welding robot based on fuzzy control
Wang Su, Miao Xingang, Li Xiaohui
2010, 36(7): 771-775.
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Abstract:
Torch pose is very important in welding intersection line which is a kind of complex space curve and needs all position welding. The fuzzy control arithmetic for torch pose fitting on saddle-back coping intersection line welding robot was designed. Weld slope, weld rotation, size of groove, intersec...
Wake vortex effect modeling and simulation in automated aerial refueling
Li Dawei, Wang Honglun
2010, 36(7): 776-780.
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Abstract:
According to the request of automated aerial refueling, the formation and distribution of wake vortex behind a large aerial tanker was discussed. A modified horseshoe vortex model that includes the effect of vortex descent and diffusion over time was given. This model was linearized nearby the mass ...
Algorithm of identifying of AOI for vehicle based on video
Xu Guoyan, Wang Chuanrong, Gao Feng, Wang Jiangfeng
2010, 36(7): 781-784.
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Abstract:
The information of surrounding was gotten by the way of vision technology in intelligent vehicle system. It is very important to detcect other vehicles in front of the ego vehicle on road. The method of vehicle detection was proposed. The method of Ostu threshold was used to realize image binarizati...
Four-element relaxation matching algorithm of images based on known initial matching pairs
Wang Hua, Hou Xiangshen, Cong Jianting, Sun Jinwei
2010, 36(7): 785-788.
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Abstract:
A four-element relaxation matching algorithm based on known initial matching pairs was proposed. The algorithm with characteristics of anti-rotation and anti-scale of rotating angle of vectors was applied as the optimization criterion of matching pairs. Under the condition of higher initial error ma...
Material parameters in 3D finite element analysis of composite structure
Zhao Libin, Qin Tianliang, Li Jiaxi, Fu Yue
2010, 36(7): 789-793.
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Abstract:
The method to determine 3D composite material properties by means of engineering constants of composite lamina was summarized by investigating lots of existed literatures. The effect of uncertain variables in material parameters upon the stiffness prediction was researched by 3D numerical simulation...
Formulation of routing performance based on routing salvage
Luo Xiling, Wang Miao, Liu Rui
2010, 36(7): 794-797.
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Abstract:
In a mobile Ad Hoc network, routing salvage is used to decrease routing overhead and ensure high delivery rate. The ratio of cached routes between the intermediate node and the determination to the total routes in the network was used to estimate the probability of the routing salvage from the break...
Helicopter slow switching attitude control based on multiple points inversion models group
Zhao Jia, Shen Gongzhang, Chen Shenggong
2010, 36(7): 798-802.
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Abstract:
Dealing with the deficiency of single point inversion model in traditional helicopter adaptive model inversion attitude control, a slow switching control method based on the multiple points inversion models group was proposed and the asymptotic stability condition was given. In the method, multiple ...
Flow field analysis and experimental investigation on gust generator
Liu Xiaoyan, Wu Zhigang, Yang Chao, Chu Longfei
2010, 36(7): 803-807.
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Abstract:
It is necessary to obtain the disturbance flow field characteristic of a gust generator beforehand in order to efficiently arrange experiment and analyze data. A variety of factors that had effects on the intensity and distribution of the gust were discussed based on a certain type of gust device, w...
Integrated methods for cabin noise control
Luo Guailin, Wang Jinjun
2010, 36(7): 808-811.
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Abstract:
When a domestic propeller aircraft was modified to an aerial testing platform, the cabin noise was too high to suffer. The characteristics of original cabin noise were tested in flight condition. The performance of various advanced noise descending materials were tested and compared in an acoustic l...
Friction compensation for hydraulic load simulator based on improved LuGre friction model
Yao Jianyong, Jiao Zongxia
2010, 36(7): 812-815.
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Abstract:
In order to acquire better performance and minimize the trace error, the friction mechanism was analyzed. As a novel friction description, LuGre friction model and its parameter had a few limitations, because this model is only the friction description of a fixed position. Synthesized on lots of fri...
Fuzzy guidance law for interception of exoatmospheric maneuvering targets
Tian Yuan, Wang Junbo, Ren Zhang
2010, 36(7): 816-820.
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Abstract:
The relative motion law between the target and the interceptor was analyzed when the divert thruster was on or off. An estimator of the interception ability was proposed based on the relative motion law. On-off conditions for the divert thruster were designed according to the shortest working interv...
Analysis and test of dynamic reaction of magnetic bearing reaction flywheel
Liu Qiang, Fang Jiancheng, Han Bangcheng
2010, 36(7): 821-825.
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Abstract:
Aimed at the magnetic bearing reaction flywheel rotor system, a novel model was proposed to describe the dynamic reaction of hybrid magnetic bearing (HMB). Based on Lagrange principle, the unbalance mass moments distributed in two planes were equivalent to the positions of two radial HMBs. Incorpora...
Optimal trajectory formation and control of human arm point-to-point movement
Sun Pengwei, Wang Shimin, Wang Qi, Fang Jie
2010, 36(7): 826-829.
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Abstract:
Optimal human arm trajectory formation was investigated on the basis of physiological characteristics of skeletal muscles and dynamic properties of contracting muscles, and a minimal effort criterion prescribed by isometric muscle contraction was proposed. The dynamic properties of contracting muscl...
Temperature measurement and surface burn out in grinding 1Cr11Ni2W2MoV high-temperature stainless steel
Li Xun, Liu Jia, Chen Zhitong, Chen Wuyi
2010, 36(7): 830-835.
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Abstract:
The measuring method for the internal instant temperature and average temperature of grinding contact zone, as well as the correlation of the average temperature and burn extent in workpiece surface in the grinding process of high-temperature stainless steel (1Cr11Ni2W2MoV) were investigated, and th...
Effect of envelop thermal radiative properties on the stratospheric super-pressure LTA vehicle helium temperature
Liu Dongxu, Yang Yongqiang, Lü Mingyun, Wu Zhe
2010, 36(7): 836-840.
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Abstract:
Environmental radiations acting on a stratospheric super-pressure sphere lighter-than-air (LTA) vehicle were analyzed, including radiation heat and convection heat. LTA vehicle thermal model was established. Based on the thermal model, the thermal effects on the vehicle were analyzed which include s...
SAR image segmentation using level set evolution without prior information
Wang Xiaoliang, Li Chunsheng
2010, 36(7): 841-844.
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Abstract:
An SAR image segmentation method based on level set evolution without employing any prior information was proposed. The method was a statistical geometric active contour model in which region information was used. The step function was utilized to estimate the probability distribution function (PDF)...
Partially parallel decoder structure of multi-rate RS codes
Hou Yi, Liu Rongke, Zhao Ling
2010, 36(7): 845-848.
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Abstract:
To meet the requirement of using multi-rate RS(Reed-Solomon) codes in the communication system, a multi-rate partially parallel RS codes decoder architecture was presented. This decoder can be divided into three major blocks by its function: the syndrome computation block, the key-equation solver bl...
Error analysis of frequency estimation algorithm based on frequency offset correction
Wang Jiqiang, Ou Pan, Zhang Chunxi, Lin Zhili
2010, 36(7): 849-852.
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Abstract:
The principle of the frequency estimation algorithm based on frequency offset correction was presented. The computation formula of the frequency estimation-s standard deviation of a complex sinusoidal signal in white Gauss noise was obtained. The value of parameter m was optimized when the data leng...
Yield surface of transversely isotropic foams under axisymmetric loadings
Chen Wei, Lu Zixing
2010, 36(7): 853-856.
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Abstract:
The effective stress and mean stress description method for two-dimension (2D) materials was applied to obtain the formulae of characteristic mean stress, characteristic stress, and characteristic strain of three-dimension (3D) transversely isotropic materials under proportional axisymmetric loading...
Infrared LEO constellation design by GDE 3 algorithm
Wang Chunming, Chen Xi, Deng Yong
2010, 36(7): 857-861.
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Abstract:
Some guidelines about the design of infrared LEO(low earth orbit) constellation were analyzed and presented which involved location precision, space coverage and the constellation cost. And some indexes were defined to measure the performance of the constellation, such as the average efficient locat...
Design of optical-effectiveness analysis tool for satellite optical sensors
He Heng, Deng Jiati
2010, 36(7): 862-866.
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Abstract:
An optical-effectiveness analysis tool for satellite optical sensors was developed based on SolidWorks platform to improve efficiency and accuracy of the analysis. The tool was used to exam whether and when the sensors would fail due to optical problems during the satellite mission. Considerations a...
Relativity between simulated and accelerated corrosion and natural environment corrosion
Li Xiaofei, Zhang Qi, Xiang Min
2010, 36(7): 867-870.
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Abstract:
On the basis of the Г.M. Gunyaev’s equation of average aging life, a study of the relativity between the simulated and accelerated corrosion and the natural environment corrosion for the carbon fiber/epoxy composite was carried out by using regression analysis method. The equation of average aging l...
Weighted Q control chart based on difference-declining weight parameters
Zhu Lingxian, Zhou Bosheng, Luo Wenjie
2010, 36(7): 871-874.
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Abstract:
To solve the problem that the ARL (average run length) of Q control chart was much longer than the ARL of control chart with known distribution parameters, the weighted Q control chart was proposed. The method to deal with one-volume-sample metric and the method to deal with multiple-volume-sample m...
Ambient occlusion in screen-space for mesostructure objects
Liu Duoli, Wang Lili, Yang Zheng, Zhao Qinping
2010, 36(7): 875-878.
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Abstract:
The objects with mesostructure surfaces have complex model structures, which result in low efficiency of ambient occlusion algorithms. To improve the rendering speed, a screen-based ambient occlusion method was proposed. By using off-screen technique, only the points which can be seen were to determ...
Disturbance modeling and parameters identification of reaction wheel assembly on spacecraft
Zhang Pengfei, Cheng Wei, Wang He, Zhao Yu
2010, 36(7): 879-882.
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Abstract:
An improved disturbance model was proposed to predict the effects of reaction wheel assembly (RWA) micro-disturbance on the spacecraft. Because the disturbance amplification by excitation of the structure modes was the most dominating effect on spacecraft attitude accuracy by RWA, the improved model...

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