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This paper proposes an alternative method to improve short-span seeking performance of a compensator based control system for a dual-stage servo actuator. The short-span seeking performance is improved by presetting initial conditions of the compensator during the short-span seek commands. This results in faster response of the secondary control loop and hence in faster seek times within the range...
In this paper we propose a new, straightforward approach to derive model of the pivot nonlinearity in the hard disk drive. The proposed nonlinear model is not based on classical pivot nonlinearity models. It is derived using frequency domain measurements obtained for different amplitudes of the actuator excitation current. One of the advantages of the obtained model is that it is derived using actual...
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