We have implemented the design of a dual-stage actuator tape head for enhanced reduction of lateral tape motion (LTM) disturbance. Our design consists of a conventional voice coil motor (VCM) and a micro-actuator for coarse and fine positioning, respectively. The micro-actuator, which is mounted on the VCM, uses a piezo crystal and allows following LTM up to the kHz regime, while the VCM follows low frequency LTM. Using step response measurements and a realization algorithm, we have created a multi-input discrete-time model of the dual-stage actuator. Based on the model, we designed and implemented a dual-stage controller, using a dual-input single-output approach based on a PQ method. The dual-stage controller controls the position of both actuators and enables an increased track-following bandwidth along with a control signal that is smaller in magnitude than that for a conventional single-stage tape head.
Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator
- Views Icon Views
- Share Icon Share
- Search Site
Boettcher, U, Raeymaekers, B, de Callafon, RA, & Talke, FE. "Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator." Proceedings of the ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. Volume 2: Automotive Systems; Bioengineering and Biomedical Technology; Computational Mechanics; Controls; Dynamical Systems. Haifa, Israel. July 7–9, 2008. pp. 495-500. ASME. https://doi.org/10.1115/ESDA2008-59471
Download citation file: