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《Journal of Beijing University of Aeronautics and Astronautics》 2009-09
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Modal parameter identification based on image streams under disturbance measurement environment

Li JingCheng Wei(School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China)  
To aim at structure modal parameter identification,a method based on a sequence of 2D images was proposed.Chose certain feature points from the object whose modal parameter need to be identified.Factorization method was employed on the image streams taken by CCD camera to solve structure from motion problem and obtain motion track of each point.Eigen-system realization algorithm(ERA) was used to identify modal parameter of structure.Especially when the measure equipment,that is CCD camera was disturbed,it can separate disturbance through image streams and get structure motion parameter,so that the identification result was ensured.A simulation model of cantilever beam under disturbed measurement environment was analyzed.It shows that the first five frequencies of the beam coordinating well with the ANSYS calculation result,which offers high significance to the dynamic characteristic identification using optic images in project programs.
【Fund】: 航空科学基金资助项目(20071551016)
【CateGory Index】: TP391.41
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【Citations】
Chinese Journal Full-text Database 1 Hits
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
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2 WU Lin-na,LIU Shao-qiang,WANG Li-lin(School of Information Science and Engineering,Central South Univerisity,Changsha 410075,China);Realization of pulse wave detecting system with time-domain signal processing method[J];Transducer and Microsystem Technologies;2008-09
3 GAO Chao1,YANG Hui1,SU Yan2,FU Qiang2(1.Key Laboratory of Optoelectronic Technology and Systems of Education Ministry of China,Chongqing University,Chongqing 400030,China;2.The 59th Research Institute of China Ordnance Industry Ministry,Chongqing 400030,China);Acquisition and analysis of vibration signal in armored car[J];Transducer and Microsystem Technologies;2009-04
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5 SHI Yu-peng1,LIU Jian-min1,XU Shi-yong2,FENG Fu-zhou1(1.The Academy of Armored Forces Engineering,Beijing 100072,China;2.China North Engine Research Institute,Datong 037036,China);Full Life Vibration Test and Characteristic Analysis of Diesel Engine[J];Vehicle Engine;2008-01
6 WANG Yecheng1, CHEN Haitao1, FU Wei2 (1. Engineering College, Northeast Agricultural University, Harbin 150030, China 2. College of Mechanical and Electric Engineering, Shihezi University, Shihezi Xinjiang 832000, China);Study on physical and mechanical properties of blackcurrants[J];Journal of Northeast Agricultural University;2009-03
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