Robust controller design based on convex optimization and RCBode plots using frequency response data: Application to hard disk drive systems

For hard disk drive (HDD) systems, designing a robust controller that achieves favorable disturbance rejection is crucial in increasing the precision of positioning of the magnetic head and the storage of HDD. This research presents a frequency response data-based convex optimization method to design a form-fixed shaping filter which guarantees robust performance and minimizes 2 norm of the error signal for a perturbed SISO system.