标题：PID2018 Benchmark Challenge: Model Predictive Control With Conditional Integral Control Using A General Purpose Optimal Control Problem Solver - RIOTS
作者：Dehghan, Sina; Zhao, Tiebiao; Zhao, Yang; Yuan, Jie; Ates, Abdullah; Chen, YangQuan
作者机构：[Dehghan, Sina; Zhao, Tiebiao; Zhao, Yang; Yuan, Jie; Ates, Abdullah; Chen, YangQuan] Univ Calif Merced, Merced, CA 95340 USA.; [Zhao, Yang] Shandon 更多
会议名称：3rd IFAC Conference on Advances in Proportional-Integral-Derivative Control (PID)
会议日期：MAY 09-11, 2018
关键词：Model predictive Control; RIOTS; Optimal Control Problems Solver;; PID2018 Benchmark Challenge; performance improvement
摘要：This paper presents a multi-variable Model Predictive Control (MPC) based controller for the one-staged refrigeration cycle model described in the PID2018 Benchmark Challenge. This model represents a two-input, two-output system with strong nonlinearities and high coupling between its variables. A general purpose optimal control problem (OCP) solver Matlab toolbox called RIOTS is used as the OCP solver for the proposed MPC scheme which allows for straightforward implementation of the method and for solving a wide range of constrained linear and nonlinear optimal control problems. A conditional integral (CI) compensator is embedded in the controller to compensate for the small steady state errors. This method shows significant improvements in performance compared to both discrete decentralized control (C1) and multi-variable PID controller (C2) originally given in PID2018 Benchmark Challenge as a baseline. Our solution is introduced in detail in this paper and our final results using the overall relative index, J, are 0.2 over Cl and 0.3 over C2, respectively. In other words, we achieved 80% improvement over Cl and 70% improvement over C2. We expect to achieve further improvements when some optimized searching efforts are used for MPC and CI parameter tuning. (C) 2018, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.