Optimal Estimation of Dynamic Loads for Multiple-Input System

[+] Author and Article Information
Zhushi Rao

State Key Laboratory of Vibration, Shock & Noise, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030, P. R. of China

Qinzhong Shi, Ichiro Hagiwara

Department of Mechanical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, Japan 152

J. Vib. Acoust 121(3), 397-401 (Jul 01, 1999) (5 pages) doi:10.1115/1.2893993 History: Received February 01, 1999; Online February 26, 2008


An optimal method is developed to estimate the dynamic loads for systems subjected to multiple inputs. The method focuses on minimizing the ensemble mean square error of the estimation. First, the inverse system analysis technique is employed to establish the error estimation equation. Then, by applying the noncausal Wiener filtering theory, the optimal estimator of dynamic loads is derived out. Numerical simulation work demonstrates that the method is of a good ability in suppressing the influence of measurement noises on estimation accuracy. Meanwhile, the simulating calculation of load estimation by a conventional method is also performed and the comparison of both results shows that the method proposed in this paper is rather effective and practicable for dynamic load estimation.

Copyright © 1999 by The American Society of Mechanical Engineers
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