title: Robust vibration control at critical resonant modes using indirect-driven self-sensing actuation in mechatronic systems.
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.
authors: Data Storage Institute, A*STAR, Singapore 117608, Republic of Singapore.
authors: Fan
authors: F
authors: Hong
authors: Chee Khiang
authors: CK
authors: Pang
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005246:Feedback; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008962:Models, Theoretical; D014159:Transducers; D014732:Vibration