Two-degree-of-freedom control of a self-sensing micro-actuator for HDD

Minoru Sasaki; Koji Fujihara; Yoonsu Nam; Satoshi Ito

doi:10.1117/12.783779

9 January 2008 Two-degree-of-freedom control of a self-sensing micro-actuator for HDD

Minoru Sasaki, Koji Fujihara, Yoonsu Nam, Satoshi Ito

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 679436 (2008) https://doi.org/10.1117/12.783779
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

Abstract

The present paper describes a two-degree-of-freedom control of a self-sensing micro-actuator for a dual-stage hard disk drive. The two-degree-of-freedom control system is comprised of a feedforward controller and a feedback controller. Two controllers are designed for the two-degree-of-freedom control system, one for the inverse dynamic model for the feedforward controller and one for the feedback controller using self-sensing signal. The feedback controller can realize the self-sensing signal. The micro-actuator uses a PZT actuator pair, installed on the assembly of the suspension. The self-sensing micro-actuator can be used to form a combined actuation and sensing mechanism. Experimental results show that the two-degree-of-freedom control approach can be used effectively for the control of the self-sensing microactuator system.

Citation Download Citation

Minoru Sasaki, Koji Fujihara, Yoonsu Nam, and Satoshi Ito "Two-degree-of-freedom control of a self-sensing micro-actuator for HDD", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 679436 (9 January 2008); https://doi.org/10.1117/12.783779

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