Work

An optimized Youla–Kucera parametrization with time-delay compensation in multirate parallel control for disturbance rejection up to Nyquist frequency

Year: 2025

Type: article

Abstract: This paper addresses the control problem of a time-delay compensation method with multirate control in Youla–Kucera parametrization to reject disturbance. Such design methodologies not only enhance the disturbance rejection performance within the control bandwidth, but can also even break through the bandwidth to reject disturbance up to the Nyquist frequency . First, the time-delay function can be simplified to the real number ± 1 at the disturbance characteristic frequency by tuning the additional time-delay factor for compensation, resulting in alleviating the detrimental effects of time delays. Next, a multirate control mode is proposed to implement the fractional compensation condition for solving the time-delay alignment problem. Moreover, this paper presents a parallel design approach for Q filters, significantly attenuating beam jitter resulting from complex multi-frequency disturbances. Finally, to assess the proposed method for beam jitter attenuation, experiments were conducted on a line-of-sight stabilization testbed. The results demonstrate that the proposed method can effectively enhance the disturbance rejection performance in time-delay control systems.

Source: Control Engineering Practice

DOI: 10.1016/j.conengprac.2025.106285

Authors: Yong Ruan, Tao Tang

Institutions: National University of Defense Technology, Chinese Academy of Sciences, Institute of Optics and Electronics, Chinese Academy of Sciences

Language: English

Topic: Advanced Control Systems Design

Subfield: Control and Systems Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,010

Funder: National Natural Science Foundation of China