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2012 Vol. 38, No. 11

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Accelerated hardware target labeling based on run-length accumulation
Zheng Hong, Li Jun
2012, (11): 1425-1429.
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To solve the problem that long time consuming and delay of target labeling algorithm seriously affected the effect and real-time performance of target tracking, fast accelerated hardware target labeling algorithm based on run-length accumulation was proposed. The pixels of image were converted to ru...
Robust LPV control design using the gap metric
Zhang Zenghui, Yang Lingyu, Zhang Jing, Shen Gongzhang
2012, (11): 1430-1434,1439.
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A new robust linear parameter-varying (LPV) controller design method based on gap-metric was presented for the wide flight envelope and strong model parameters uncertainties of hypersonic vehicle. A new convex decomposition strategy with the optimal gap-metric was proposed. In order to reduce the co...
Application of routing algorithm in configuration optimization of LEO communication satellite constellation
Sun Yuanhui, Han Chao
2012, (11): 1435-1439.
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Abstract:
The special features of low earth orbit (LEO) communication constellation determine that costs, coverage and routing performance should be wholly taken into account in configuration optimization. In previous cases, the optimized configuration cannot meet the requirements well as routing performance ...
Image distortion fast correction for image intensifier DR/CT system
Yang Min, He Xiaoyi, Wei Dongbo, Liang Lihong
2012, (11): 1440-1444.
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Starting from the distortion characteristics, correction precision and real time correction requirements for XRS-152/153 image intensifier DR/CT system, a cubic polynomial curve-fitting algorithm was proposed. Meanwhile, in order to solve its calculation complexity problem, graphic processing unit (...
Modeling and verification of software safety requirement based on ontology
Li Zhen, Liu Bin, Miao Hong, Yin Yongfeng
2012, (11): 1445-1449.
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The catastrophic accidents are usually caused by and related to safety requirement and the manual review cannot meet the strict verification requirement of software safetyd.Consequently, the definition of software safety was discussed, the recognized and related standards with guidebooks were strict...
Ambiguity of rotating-element electric-field vector method and elimination method
Zhai Yu, Su Donglin
2012, (11): 1450-1453.
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Ambiguity of rotating-element electric-field vector (REV) method for calibration of phased array antenna and the elimination method were studied. Two sets of solutions exist for calibration of phased array antenna using the REV method. And one of sets is pseudo solution. Ambiguity and physical inter...
Disturbance compensated terminal sliding mode control for hypersonic vehicles
Zeng Xianfa, Wang Xiaohu, Zhang Jing, Shen Gongzhang
2012, (11): 1454-1458.
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An attitude control approach for hypersonic vehicles based on disturbance compensated terminal sliding mode(TSM) was studied. First, a modified TSM surface which switched to high gain linear sliding mode surface while in the neighborhood of equilibrium point was proposed to overcome the singularity ...
Disturbance observer based magnetically suspended reaction attitude flywheel motor control
Zhou Xinxiu, Fang Jiancheng, Liu Gang, Zhang Ran
2012, (11): 1459-1463,1468.
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As the existence of mass unbalance of magnetically suspended flywheel rotor, the precision of output torque/speed of flywheel would be influenced. In order to estimate the unbalance vibration, a nonlinear disturbance observer for time-variation harmonic disturbance was proposed. The dynamic response...
Dynamic plastic collapse mechanical model of honeycomb structures out-plane deformation
Fan Yanbin, Wang Zhili
2012, (11): 1464-1468.
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Based on the static plastic collapse stress (SPCS) theoretical model, a dynamic plastic collapse stress (DPCS) theoretical model of honeycomb structures under impact loading was built. In view of the effect that the strain rate had on the dynamic mechanical performance of honeycomb material, the rel...
Integrated navigation based on pulsars and sun observation including clock error correction
Yang Chengwei, Deng Xinping, Zheng Jianhua, Gao Dong
2012, (11): 1469-1473.
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Abstract:
In order to improve the accuracy of navigation and clock correction of a deep space probe during cruise phase, an integrated navigation method was advanced. By combining the X-ray pulsar based navigation(XPNAV) with the sun line-of-sight vector, and the radial velocity of the probe relative to the s...
Situ observations of structural transformation in TB5 titanium alloy during one way tensile test
Liu Changxu, Wu Guoqing, Sha Aixue, Wang Qingrui
2012, (11): 1474-1477.
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Abstract:
Microstructure transformation in Ti-15V-3Cr-3Sn-3Al(TB5) titanium alloy during one way tensile test was studied in situ observations of the video microscope. The results show that the change of the microstructure of the titanium alloy in uniaxial tension is not obvious in the elastic stage, but acco...
Global stabilization of nonlinear systems via linear output feedback
Qu Weiran, Lin Yan, Zhang Xu
2012, (11): 1478-1482.
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The problem of global stabilization for a class of uncertain nonlinear systems using linear output feedback is considered. Instead of imposing triangular type restrictions on the nonlinear uncertainties, the existing linear output feedback control schemes were extended to certain nontriangular type ...
Modification of SVM’s optimal hyperplane based on minimal mistake
Jiang Jueyi, He Yuzhu, Li Jianhong
2012, (11): 1483-1486.
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Since some value of error penalties C in C-support vector machine (C-SVM) may cause extreme and irrational optimal separating hyperplanes, a new modification of SVM’s optimal hyperplane was proposed. By modifying the distance restriction of separating hyperplane between positive and negative classes...
Integrated reliability assessment for Weibull distribution using varied environment data
Hong Dongpao, Ma Xiaobing, Zhao Yu
2012, (11): 1487-1491.
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To improve the stability and accuracy of the reliability assessment, a method of integrated reliability assessment for Weibull distribution was proposed using the varied environment test data. In this method, the location parameter and scale parameter were assumed respectively as a function of relev...
GPS range error analysis based on navigation message representation
Wang Luxiao, Huang Zhigang, Zhao Yun
2012, (11): 1492-1496.
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Aiming at the new CNAV/CNAV-2 navigation message format in the GPS modernization process, the current GPS navigation message format and the new format in data expression were compared. To evaluate the navigation and positioning influence of different data truncated ways, the concept of truncation er...
High precision control based on ADRC used in gimbal system of MSCMG
Xue Lijuan, Li Haitao, Li Hong, Xu Xiangbo
2012, (11): 1497-1501.
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Aiming at solving the problems that speed precision would be influenced by nonlinear friction and external random disturbance existing in magnetically suspended control moment gyroscope(MSCMG), a high-precision speed control method was proposed based on active disturbance rejection controller(ADRC)....
Robot object recognition based on learning and cognition with conceptual space
Liu Bingyao, Qin Shiyin
2012, (11): 1502-1506,1511.
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Abstract:
In view of the challenging issue for robot multi-class object recognition in complex environments with original feature space because those features can only embody some low level knowledge with poor discriminative performance, an approach to robot object recognition was presented based on conceptua...
Degaussing coils optimal calibration method based on multi-objectives
Zhu Xianqiao, Liu Daming, Yang Mingming
2012, (11): 1507-1511.
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Abstract:
The current method of ship degaussing coils optimal calibration has a shortage that it only takes the ship’s magnetic field crest value into account while pay less attention to its magnetic gradient crest value. Considering the current method’s shortage, a kind of calibration method with the purpose...
Approach of determining accelerated degradation mechanism consistency’s boundary for accelerometers
Wang Qiancheng, Chen Yunxia, Deng Fengli, Kang Rui
2012, (11): 1512-1516.
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Through analyzing the Arrhenius model in the accelerated degradation testing, it is found that there is a close relationship between the operating stress and the slope of degraded trajectory in the accelerometer accelerated testing. The degradation trajectory models such as linear function, exponent...
Method of multi-view modeling for 3D target based on SVDD
Ding Hao, Li Xudong, Zhao Huijie
2012, (11): 1517-1521.
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Abstract:
Popular 3D target recognition approaches based on image continue to struggle with challenge—viewpoint sensitivity. Multi-view modeling technique for 3D target offers promise for this challenge. A method of modeling 3D target based on support vector data description (SVDD) that could obtain a tight d...
Analysis method for lunar landers landing safety
Su Qinghua, Zhao Yan
2012, (11): 1522-1526.
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In the lunar exploration program Ⅱ, the lunar lander to a safelanding site selection and realize safelanding is the key issues. Without considering engine control, attitude control and dynamic property, a high-definition landing territory was simulated on computer based on the low-definition data an...
Tractive performance analysis of diameter-variable wheel for 4WD all-terrain vehicle on soft soil
Chen Xinbo, Gao Feng, Xu Guoyan, Yao Xiaojiang
2012, (11): 1527-1531.
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Four-wheel drive all-terrain light exploration vehicle with diameter-variable wheels was innovatively designed out to solve the problems when conventional ground vehicles and wheels driving on soft terrain, such as poor trafficability, low efficiency, big energy consumption and even can-t drive. The...
Improved Tour-Map graphical method for gravity-assist
Li Xiaoyu, Zheng Jianhua, Wu Xia
2012, (11): 1532-1536.
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The analysis of gravity-assist effects is of great importance on the design stage to specify both the swingby sequence and the initial parameters. An improved Tour-Map graphical method for this purpose was introduced, which permits a quick identification of key parameters in ballistic gravity-assist...
Optimization of lunar soft landing trajectory based on combinational algorithm
Cao Tao, Dong Changhong
2012, (11): 1537-1541.
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Based on the Pontryagin’s maximal principle, the fuel optimal lunar soft landing problem can be simplified as a two point boundary value problem with variable final time. The initial adjoint variables were listed by searching the neighborhood of guessed adjoint variables with the employment of the c...
Vertical water entry cavity of cylinder body
He Chuntao, Wang Cong, Wei Yingjie, Ma Xiangfu
2012, (11): 1542-1546.
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Experimental studies of the vertical water-entry of cylinder bodies were conducted using high-speed camera to capture the splashes over the water surface and the subsurface cavity shapes. The cavities formation and stability were discussed for 140癱onical cylinder bodies fall into water freely. Exper...
Improved HSSE-tree method based on binary label
Du Min, Feng Wenquan, Wang Dong, Zhao Qi
2012, (11): 1547-1551.
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Because of the increase of the demand for the autonomy of spacecrafts, model-based diagnosis has been a hot research spot both at home and abroad. Computing all minimal hitting sets is a key step of model-based diagnosis. An effectively improved method of HSSE-tree called Binary-label HSSE based on ...
Energy management strategy for composite energy storage for mobile robots
Lü Yingming, Yuan Haiwen, Cui Yong
2012, (11): 1552-1556.
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In order to enhance power performance of mobile robots and to extend service life of the energy storage without increasing in weight, the battery/supercapacitor composite energy storage was used instead of single battery. The performance of the composite energy storage is determined by the energy ma...
Fault diagnosis based on blind source separation using kernel function with finite support samples
Yang Yanlong, Cheng Wei, Chang Hongzhen
2012, (11): 1557-1561.
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It is important to extract fault features when machine would be in fault state. In order to separate different fault vibration signals from measured mixtures and diagnose the fault features of the machine effectively according to the separated signals, a blind source separation (BSS) method using ke...
Theoretical analysis of heat transfer in oscillating flows with fractional Maxwell model
Li Mingzhen, Dong Jinzhong
2012, (11): 1562-1566.
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By solving the momentum and energy equations of the oscillating flow with the fractional Maxwell model, which is driven by a sinusoidally varying pressure gradient, the general analytical solutions of the velocity profile, the temperature profile and the enhanced thermal diffusivity were obtained. B...

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