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Rollout scheduling and control for disturbed systems via tube MPC
arXiv - CS - Systems and Control Pub Date : 2020-04-03 , DOI: arxiv-2004.01605
Stefan Wildhagen; Frank Allgöwer

Rollout control is an MPC-based control method, in which a controller is periodically activated to schedule the transmission of sensor or actuator data. Therein, a preassigned traffic specification acts as a constraint on the scheduled transmissions, ensuring that they are triggered at an admissible rate for the underlying communication network. In this paper, we extend the theory of rollout control by considering bounded disturbances on the controlled plant in the presence of state and input constraints. We use methods from tube MPC, where the error between the nominal (undisturbed) system, used as a prediction model, and the real system is kept in a robust control invariant set. This approach requires satisfaction of a \emph{maximum} inter-transmission interval in closed loop, a guarantee that is not straightforward to obtain in rollout control. Our main contribution is to introduce a novel tube MPC scheme adapted for rollout control, which contains an additional constraint on the predicted transmission schedule. We show that by virtue of this schedule constraint, the inter-transmission interval is bounded in closed loop. We also establish recursive feasibility of this novel MPC scheme and show convergence of the system.
更新日期:2020-04-06

 

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