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http://dx.doi.org/10.5050/KSNVN.2003.13.12.965

Controller Design of Piezoelectric Milliactuator for Dual Stage System  

Eo-Jin, Hong (Dep. of Information Storage Engineering, Yonsei Univ.)
No-Cheol, Park (Dep. of Mech. Engineering, Yonsei Univ.)
Hyun-Seok, Yang (Dep. of Mech. Engineering, Yonsei Univ.)
Young-Pil, Park (Dep. Of Mech. Engineering, Yonsei Univ.)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.13, no.12, 2003 , pp. 965-971 More about this Journal
Abstract
To reach high areal density, less track pitch is expected and more servo bandwidth is required. One approach to overcoming the problem is by using dual stage servo system. For this system. we have suggested new milliactuator based on the shear mode of piezoelectric elements to drive the head suspension assembly. In this paper, we introduce milliactuator and controller design method, PQ method. PQ method reduces the controller design problem for DISO (dual-input/single-output) systems to two standard controller design problems for SISO ( single-input/single-output) problems. The first part of PQ method directly addresses the issue of actuator output contribution, and the second part allows the use of traditional loop shaping to achieve the overall system performance. This paper shows how to employ the PQ method to meet aggressive close-loop performance specifications for a disk drive system with a VCM and piezoelectric milliactuator.
Keywords
Milliactuator; PQ Method; Servo Bandwidth;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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