Paper Title:
Model Predictive Control for setpoint tracking
Published on:
5 March 2024
Primary Category:
Optimization and Control
Paper Authors:
Daniel Limon,
Antonio Ferramosca,
Ignacio Alvarado,
Teodoro Alamo
MPCT adds artificial steady state as optimization variable
Relaxes terminal constraint using artificial state
Penalizes deviation of artificial state from setpoint
Ensures feasibility and stability for changing setpoints
Achieves larger region of asymptotic stability than standard MPC
Model predictive control for constant setpoint tracking
This paper presents a model predictive control (MPC) approach called MPC for tracking (MPCT) to steer a constrained linear system to track constant setpoints. It ensures recursive feasibility and asymptotic stability even when setpoints change. The MPCT adds an artificial steady state as a decision variable, relaxes the terminal constraint, and penalizes deviation from the artificial state to the true setpoint. This allows it to recursively re-optimize to track new setpoints. Under mild assumptions, the region of asymptotic stability and domain of attraction are larger than standard MPCs, and local optimality can be achieved.
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