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Embedded optimization for mixed logical dynamical systems Damian
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DOI：10.1016/j.compchemeng.2014.06.005.png)
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Abstract
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Predictive control of hybrid systems is currently considered prohibitive using embedded computing platforms. To overcome this limitation for mixed logical dynamical systems of small to medium size, we propose to use (1) a standard branch-and-bound approach combined with a fast embedded interior point solver, (2) pre-processing heuristics, run once and offline, to significantly reduce the number of subproblems to be solved, and (3) relaxations of the original MPC problem that allow a trade off between computation time and closed-loop performance. A problem-specific ANSI C implementation of the proposed method can be automatically generated, and has a fixed memory footprint and a code size that is insignificantly larger than that of the subproblem solver. Two extensive numerical studies are presented, where problems with up to 60 binary variables are solved in less than 0.2 s with a performance deterioration of below 2% when compared to an optimal MPC scheme. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords:
Mixed logical dynamical systems
Hybrid model predictive control
Embedded mixed integer real-time
optimization
Branch and bound
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