1. Optimal Control of Polynomial Hybrid Systems via Convex Relaxations.
- Author
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Zhao, Pengcheng, Mohan, Shankar, and Vasudevan, Ram
- Subjects
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OPTIMAL control theory , *HYBRID systems , *POLYNOMIALS , *RELAXATION for health - Abstract
This paper considers the optimal control for hybrid systems whose trajectories transition between distinct subsystems when state-dependent constraints are satisfied. Though this class of systems is useful while modeling a variety of physical systems undergoing contact, the construction of a numerical method for their optimal control has proven challenging due to the combinatorial nature of the state-dependent switching and the potential discontinuities that arise during switches. This paper constructs a convex relaxation-based approach to solve this optimal control problem by formulating the problem in the space of relaxed controls, which gives rise to a linear program whose solution is proven to compute the globally optimal controller. This conceptual program is solved using a sequence of semidefinite programs whose solutions are proven to converge from below to the true solution of the original optimal control problem. Finally, a method to synthesize the optimal controller is developed. Using an array of examples, the performance of the proposed method is validated on problems with known solutions and also compared to a commercial solver. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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