A Linear Parameter Varying Approach for Robust Dead-Time Compensation ⁎. Issue 1 (2019)

• Record Type: Journal Article
• Authors: Morato, Marcelo Menezes; Normey-Rico, Julio E.
• Is Part Of: IFAC-PapersOnLine. Volume 52:Issue 1(2019)
• Page Start: 880
• Page End: 885
• Publication Date: 2019
• Subjects: Time-varying Delay -- Dead-time compensators -- Smith Predictor -- Dead-time estimation -- Linear Parameter Varying Systems; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2019.06.173
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: This paper proposes a novel method for the design of time-varying dead-time compensators. The presented approach is a modified version of Filtered Smith Predictor (FSP), extended with a delay estimator and a Linear Parameter Varying (LPV) feedback filter. Just as with the FSP, this scheme can be tuned for an adequate trade-off between perfomance and robustness, as well as for unstable and integrative processes. The LPV filter (scheduled by the estimation of the dead-time) is used to overcome the time-varying delay as it autonomously adapts itself and imposes, accordingly, more/less robustness to the closed-loop. Simulation results considering the temperature control of a Solar Collector Field are given to illustrate the method's performance towards reference tracking, disturbance rejection and uncertainty.