Relaxation Methods for Mixed-Integer Optimal Control of Partial Differential Equations

Details Relaxation Methods for Mixed-Integer Optimal Control of Partial Differential Equations Relaxation Methods for Mixed-Integer Optimal Control of Partial Differential Equations

2012-02-24

arxiv.org/abs/1202.5479v1

Mathematics

Optimization and Control

Scientific paper

We consider integer-restricted control of systems governed by abstract semilinear evolution equations. This includes the problem of optimal control design for certain distributed parameter systems endowed with multiple actuators, where the task is to minimize costs associated with the dynamics of the system by choosing, for each instant in time, one of the actuators together with ordinary controls. We consider relaxation techniques that are already used successfully for mixed-integer optimal control of ordinary differential equations. Our analysis yields sufficient conditions such that the solution of the relaxed problem can be approximated with arbitrary precision by a solution satisfying the integer restrictions. The results are obtained by semigroup theory methods. The approach is constructive and gives rise to a numerical method. We supplement the analysis with numerical experiments.

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