Robust QFT control of a piezo-based vibration isolation system with consideration of hysteresis effect
Journal
Proceedings of the 7th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2004
Journal Volume
1
Pages
717-723
ISBN
0791841731; 9780791841730
Date Issued
2004
Author(s)
Abstract
In this paper, we investigate a three-degree-of-freedom (X-Y-Z) piezo-based vibration isolation platform. The hysteresis effect together with system uncertainties are represented by an approximate model. The approximate model consists of a variable gain and variable time-delay which are the functions of the input magnitude and frequency. Experiments are performed to identify the parameters of the proposed approximate model. To achieve robust performance of the isolation system with consideration of the hysteresis effect, quantitative feedback theory (QFT) controller is proposed. The hysteresis model is naturally built into the template of plant. It is shown from closed loop experiments that the designed controller can achieve high disturbance rejection within the bandwidth of 10–60Hz for the MIMO vibration isolation system.
SDGs
Type
conference paper