IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society | 2019
Control System Improvement for Triple-Stage-Actuator System of Hard Disk Drive Using the RBode Plot
Abstract
We present a control system design method for triple-stage-actuator systems of HDDs (Hard Disk Drives) with the Robust Bode (RBode) plot. The RBode plot represents robust performance criteria with the gray area on the Open-loop Bode plot. By using the RBode plot, we can design the controller which satisfy robust performance with visualized guidelines. This paper presents the adaptation method of RBode plot in Multi-Input-Single-Output system and then the design method of the control system for the triple-stage-actuator systems of HDDs. Simulation results show that the proposed method enables us to improve positioning error in the triple-stage actuator system of HDDs.