Design and Analysis of Computer Disk Drive Suspension Vibration Compensation Control
نویسندگان
چکیده
Based on the existing dual-stage control scheme for hard disk drives, this paper focuses on the design and analysis of adaptive feedforward control of airflow induced suspension vibration, which utilizes the vibration signal obtained from instrumented suspension. In this scheme, a strain signal on the surface of the instrumented suspension is obtained which is indicative of the suspension’s vibration motion. The slider at the tip of the suspension is controller by a MEMS microactuator (MA). The effect of MA resonance mode variations on the performance of the controllers are also analyzed. Online identification of the MA model can be added to this structure to compensate for the variations in MA’s resonance mode. Simulations show that the proposed technique can successfully suppress the suspension vibration induced TMR and is suited for use in increasingly high track density, high performance hard disk drives.
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