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— This paper proposes a novel direct adaptive control method for rejecting unknown deterministic disturbances and tracking unknown trajectories in systems with uncertain dynamics when the disturbances or trajectories are the sum-mation of multiple sinusoids with known frequencies, such as periodic profiles or disturbances. The proposed algorithm does not(More)
A direct adaptive feedforward control method for tracking repeatable runout (RRO) in bit patterned media recording (BPMR) hard disk drives (HDD) is proposed. The technique estimates the system parameters and the residual RRO simultaneously and constructs a feedforward signal based on a known re-gressor. An improved version of the proposed algorithm to avoid(More)
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