A numerical solution to the minimum-time control problem for linear discrete-time systems

Details A numerical solution to the minimum-time control problem for linear discrete-time systems A numerical solution to the minimum-time control problem for linear discrete-time systems

2011-09-17

arxiv.org/abs/1109.3772v2

Computer Science

Systems and Control

Scientific paper

The minimum-time control problem consists in finding a control policy that will drive a given dynamic system from a given initial state to a given target state (or a set of states) as quickly as possible. This is a well-known challenging problem in optimal control theory for which closed-form solutions exist only for a few systems of small dimensions. This paper presents a very generic solution to the minimum-time problem for arbitrary discrete-time linear systems. It is a numerical solution based on sparse optimization, that is the minimization of the number of nonzero elements in the state sequence over a fixed control horizon. We consider both single input and multiple inputs systems. An important observation is that, contrary to the continuous-time case, the minimum-time control for discrete-time systems is not necessarily entirely bang-bang.

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