High accuracy estimation technique of structural vibration by virtual sensing

Abstract

Virtual sensing is a method to estimate unobservable or unmeasurable state variables by combining exsisting measurement data with model information. When FE model is applied to the virtual sensing, vibration response data estimated at all nodes. When it enables to estimate the vibration response data at all nodes, for example, it will be possible to simulate sound radiation from mechanical structure with the vibration response data. In this paper, it is illustrated how to estimate high accuracy vibration response data. It then examines the effect of excitation force on the vibration estimation results. Based on the results of this verification, a method to improve the accuracy of vibration response estimation is proposed. It also tests the relationship with accuracy of estimated vibration data and the difference between real and estimated location of excitation force. Finally, it tests how the quality of estimation for sound radiation