@inproceedings{b2eda786805c4d4d81fb3a8a78ff1801,
title = "Stabilizing dynamic control design for systems with time-varying delay in control loop",
abstract = "Synthesis of nth-order dynamic systems with time-varying delay in the control loop is considered in this paper. First-order Pad{\'e} approximation is sought to solve the infinite-dimensional problem of the pure delay. Although the approximation describes the problem in a finite-dimensional state space, it poses internal dynamics instability inherited from the resulted non-minimum phase system. The unstable internal dynamics restricts the system closed-loop bandwidth and leads to an imperfect tracking performance. To circumvent this problem, the overall system dynamics is explored in terms of unstable internal dynamics and input/output pairs. The system internal dynamics is used to design a parameter-varying dynamic compensator which stabilizes the internal dynamics based on a desired tracking error profile. The presented dynamic compensator is used to develop a dynamic controller whose parameter-varying gains are explicitly determined in a systematic and straightforward manner. The proposed approach is used to design a controller for a spark ignition lean-burn engine with large time-varying delay in the control loop. The results are demonstrated against a baseline PI controller combined with a parameter-varying Smith predictor to compensate for the time-varying delay.",
keywords = "Automotive, Delay systems, Time-varying systems",
author = "Behrouz Ebrahimi and Reza Tafreshi and Javad Mohammadpour and Matthew Franchek and Karolos Grigoriadis",
year = "2014",
doi = "10.1109/ACC.2014.6859299",
language = "English (US)",
isbn = "9781479932726",
series = "Proceedings of the American Control Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "5558--5563",
booktitle = "2014 American Control Conference, ACC 2014",
address = "United States",
note = "2014 American Control Conference, ACC 2014 ; Conference date: 04-06-2014 Through 06-06-2014",
}