CUED Publications database

Multiplexed model predictive control

Ling, K-V and Maciejowski, J and Wu, B-F (2005) Multiplexed model predictive control. IFAC Proceedings Volumes (IFAC-PapersOnline), 16. pp. 574-579. ISSN 1474-6670

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Abstract

Most academic control schemes for MIMO systems assume all the control variables are updated simultaneously. MPC outperforms other control strategies through its ability to deal with constraints. This requires on-line optimization, hence computational complexity can become an issue when applying MPC to complex systems with fast response times. The multiplexed MPC scheme described in this paper solves the MPC problem for each subsystem sequentially, and updates subsystem controls as soon as the solution is available, thus distributing the control moves over a complete update cycle. The resulting computational speed-up allows faster response to disturbances, and hence improved performance, despite finding sub-optimal solutions to the original problem. The multiplexed MPC scheme is also closer to industrial practice in many cases. This paper presents initial stability results for two variants of multiplexed MPC, and illustrates the performance benefit by an example. Copyright copy; 2005 IFAC. Copyright © 2005 IFAC.

Item Type: Article
Uncontrolled Keywords: Constrained optimization Decentralised control Multivariable control Periodic systems Predictive control
Subjects: UNSPECIFIED
Divisions: Div F > Control
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:34
Last Modified: 30 Nov 2014 23:45
DOI: