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Optimal control law design for cyclic switching systems based on the minimum principle and singular arcs. Application to a buck converter

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1 Author(s)
Diego Patino ; Departamento de Electrónica, Facultad de Ingeniería, Pontificia Universidad Javeriana, Carrera 7 No. 40-62, Bogotá - Colombia

In this article, we present a method for computing an optimal state feedback control law for switched affine systems which do not have common equilibrium points. The hybrid solution is obtained from a general convex formulation for which the existence of the optimal solution is guaranteed. We show that the synthesis of the optimal trajectories yields a partition of the state space with respect to the mode. The design uses singular arcs which are obtained through an algebraic condition. In order to test the performance of the control law, an academical buck converter is taken as an example with a quadratic and a minimum time criteria.

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15-17 Sept. 2010