کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6469254 | 1423748 | 2017 | 10 صفحه PDF | دانلود رایگان |
- Construction of a regionless explicit model predictive controller.
- Comparison of regionless explicit MPC with fast-performing suboptimal methods.
- Experimentally tested regionless explicit MPC controller on a laboratory column.
- Significant reduction of the memory footprint compared to traditional explicit MPC.
This paper shows how to construct and implement explicit MPC feedback laws for systems with a large number of states. Specifically, the construction of critical regions of the explicit MPC solution is replaced by a two-step procedure. First, all optimal active sets are enumerated off-line and corresponding KKT matrices are pre-factored. Then, in the on-line step, the optimal control inputs are identified by checking primal and dual feasibility conditions using the pre-factored data. The feasibility and performance of the proposed approach are experimentally demonstrated on the control of the laboratory binary distillation column, described by a dynamical model with 10 state variables. We show that the control algorithm requires only modest computational resources on-line. A comparison of the memory and computational demands of the proposed method with the on-line solution of the corresponding quadratic program via the state-of-the-art solver as well as the approximated solution via the first-order method is made.
Journal: Computers & Chemical Engineering - Volume 96, 4 January 2017, Pages 139-148