Active vibration control experiments of a large flexible vibration isolation structure

An active control system based on Filtered-x LMS algorithm with off-line secondary path modeling is proposed and applied in active vibration control of a large flexible vibration isolation structure, which is an isolation system attached on a large flexible structure supported by twenty-six air springs. Details of the large flexible vibration isolation system, the features of the active system, and experimental investigation including the single-input single-output and multi-input multi-output experiments are presented in this paper. The experimental results show that vertical vibration levels of error sensor positions on the flexible foundation can be reduced greatly. At last some results are presented and discussed.