Abstract
Two types of linear digital repetitive control systems are designed and analyzed to reduce the error spectrum, including not only harmonic but also non-harmonic components. First, a novel gain adjusting algorithm is suggested for conventional and modified repetitive control systems with modelling uncertainties, in which the gain of the repetitive controller is adjusted to reduce the infinite norm of error in the frequency domain. For this, the relative error transfer function is newly defined as the ratio of the error spectrum for the system with a repetitive controller to the error spectrum for the system without a repetitive controller. Secondly, as an alternative to a repetitive control system with the gain adjusting, a repetitive control system with higher-order repetitive function is analyzed and designed, where the weightings of the higher-order repetitive function are determined in such a way that the infinite norm of the relative error transfer function is minimized. To show the validity of the proposed methods, computer simulation results are illustrated for a typical disk-drive head-positioning servo system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
