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Frequency response function estimation for three axes hydraulic shaking system by using Hv algorithm

YANG Zhidong,GUAN Guangfeng,CONG Dacheng,HAN Junwei,LI Hongren(Harbin Institute of Technology,Harbin 150001,China)  
Three axes hydraulic shaking system as the means to recreate vibration environment can accurately reproduce reference power spectrum density and time history response.The vibration control is a key technique to meet the requirement.It is based on the frequency response function estimation that determines the speed and stability of control process.This paper analyses several classical frequency response function estimation algorithms.A kind of Hv algorithm is constructed on the basis of eigen-analysis and perturbation theory to overcome the shortcomings of conventional algorithms.Moreover,an experiment is carried out by using three axes hydraulic shaking table.Experiment results show that the Hv algorithm is suitable.
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