Robust-distributed MPC tolerant to communication loss. (8th May 2016)

• Record Type: Journal Article
• Authors: Kumar, Divya; Al-Gherwi, Walid; Budman, Hector
• Is Part Of: Computers & chemical engineering. Volume 88(2016)
• Page Start: 30
• Page End: 38
• Publication Date: 2016-05-08
• Subjects: Distributed model predictive control -- Robustness -- Linear matrix inequalities; Chemical engineering -- Data processing -- Periodicals; 660.0285
• DOI: 10.1016/j.compchemeng.2015.12.010
• Languages: English
• ISSNs: 0098-1354

Abstract

Highlights: A new method to handle communication losses in robust-DMPC framework by using robust observer is proposed. The robust observer can be integrated with robust-DMPC with additional LMI's. New algorithm is shown to have superior performance over nominal observer for two case studies. Abstract: Distributed Model Predictive Control (DMPC) algorithms reported in the literature had often assumed that state measurements are available to all subsystems at all time instants. However, this assumption is not valid in the presence of loss of communication or data. Then designing for such losses within DMPC becomes critical to overall performance and stability of the system. In this work communication loss was considered for robust DMPC by using within each subsystem an observer, which continuously and recursively estimates states' bounds for all the plant states. These state bounds are then posed as extra constraints within a Linear Matrix Inequalities' formulation that is used to calculate the control actions based on the minimization of an upper bound on robust performance.