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Design and Stability Test of a HDD Hybrid Controller Using Sliding-Mode Control  

Byun Ji-Young (성균관대학 전기전자공학부)
Kwak Sung-Woo (계명대학교 전자공학과)
You Kwan-Ho (성균관대학교 정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.53, no.10, 2004 , pp. 671-677 More about this Journal
Abstract
This paper presents the design of a now controller for the read/write head of a hard disk drive. The general controller for seeking is the time-optimal control. However if we use only the time optimal control law, this could be vulnerable to chattering effect. To solve this problem, we propose a modified controller design algorithm in this paper. The proposed controller consists of bang-bang control for seeking and sliding-mode control for tracking. Moreover, to test the robustness and stability of control system, a bounded disturbance is selected to maximize a severity index. Simulation results show the superiority of the proposed controller through comparison with time optimal VSC(variable structure control).
Keywords
HDD (hard disk drive); VCM Actuator; Bang-Bang Control; Sliding-Mode Control;
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