APPLICATION OF FRF ESTIMATOR BASED ON ERRORS-IN-VARIABLES MODEL IN MULTI-INPUT MULTI-OUTPUT VIBRATIO

• 作 者: GUAN Guangfeng CONG Dacheng HAN Junwei LI Hongren
• 机 构: School of Mechanical and Electrical Engineering,Harbin Institute of Technology, Harbin 150001, China
• 出 处: 机械工程学报（英文版）
• 发表日期: 2007年4期
• 关键词: Multi-input multi-output(MIMO) System Errors-in-variables(EV) model 6-DOF hydrau

The FRF estimator based on the errors-in-variables (EV) model of multi-input multi-output (MIMO) System is presented to reduce the bias error of FRF Hl estimator. The FRF Hl estimator is influenced by the noises in the inputs of the System and generates an under-estimation of the true FRF. The FRF estimator based on the EV model takes into account the errors in both the inputs and Outputs of the System and would lead to more accurate FRF estimation. The FRF estimator based on the EV model is applied to the waveform replication on the 6-DOF (degree-of-freedom) hydraulic Vibration table. The result shows that it is favorable to improve the control precision of the MIMO Vibration control system.