Adaptive Compensation of Contact‐Induced Vibration in High Density HDD Servo Systems Using Phase Lead Peak Filter Method

Abstract

In this paper, a phase lead peak filter (PLPF) design method is adopted to adaptively compensate for high frequency contact‐induced vibration (CIV) in hard disk drive (HDD) servo systems. Based on the prior investigation of CIV, a baseline feedback controller is first employed to stabilize the servo loop, and then add‐on peak filters are connected in parallel with the baseline controller to further suppress the vibrations in the high frequency range. The proposed CIV compensation scheme has a simple control structure, is capable of dealing with multiple vibration modes that may not be within the bandwidth of open‐loop transfer function, and is robust to the change of CIV in frequency and magnitude. The performance of the proposed method in CIV compensation is validated by simulation and experiment.

Special Issue on “Advances in Active Control of Sound and Vibration”: Editorial

“…Then Xu et al . apply an adaptive phase lead peak filter method to the contact‐induced vibration of a hard disc drive servo‐system.…”