A Linear Parameter Varying Approach for Robust Dead-Time Compensation

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. (C) 2019, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.