Robust vibration control at critical resonant modes using indirect-driven self-sensing actuation in mechatronic systems

Fan Hong; Chee Khiang Pang

doi:10.1016/j.isatra.2012.06.004

Robust vibration control at critical resonant modes using indirect-driven self-sensing actuation in mechatronic systems

ISA Trans. 2012 Nov;51(6):834-40. doi: 10.1016/j.isatra.2012.06.004. Epub 2012 Jul 4.

Authors

Fan Hong¹, Chee Khiang Pang

Affiliation

¹ Data Storage Institute, A*STAR, Singapore 117608, Republic of Singapore.

PMID: 22766225
DOI: 10.1016/j.isatra.2012.06.004

Abstract

This paper presents an improved indirect-driven self-sensing actuation circuit for robust vibration control of piezoelectrically-actuated flexible structures in mechatronic systems. The circuit acts as a high-pass filter and provides better self-sensing strain signals with wider sensing bandwidth and higher signal-to-noise ratio. An adaptive non-model-based control is used to compensate for the structural vibrations using the strain signals from the circuit. The proposed scheme is implemented in a PZT-actuated suspension of a commercial dual-stage hard disk drive. Experimental results show improvements of 50% and 75% in the vibration suppression at 5.4kHz and 21kHz respectively, compared to the conventional PI control.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms*
Computer Simulation
Feedback*
Micro-Electrical-Mechanical Systems / instrumentation*
Models, Theoretical*
Transducers*
Vibration