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Stability of model predictive control with mixed constraints

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2 Author(s)
Zheng, A. ; Air Products & Chem. Inc., Allentown, PA, USA ; Morari, M.

We derive stability conditions for model predictive control (MPC) with hard constraints on the inputs and “soft” constraints on the outputs for an infinitely long output horizon. We show that with state feedback, MPC is globally asymptotically stabilizing if and only if all the eigenvalues of the open loop system are in the closed unit disk. With output feedback, we show that the results hold if all the eigenvalues are strictly inside the unit circle. The online optimization problem defining MPC can be posed as a finite dimensional quadratic program even though the output constraints are specified over an infinite horizon

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Automatic Control, IEEE Transactions on  (Volume:40 ,  Issue: 10 )