Economic performance design based on adaptive iterative learning control of MPC systems

WANG Zhenlei; LIU Xueyan; WANG Xin

doi:10.16511/j.cnki.qhdxxb.2016.24.024

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Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (9) : 1016-1024. DOI: 10.16511/j.cnki.qhdxxb.2016.24.024

CHEMISTRY AND CHEMICAL ENGINEERING

Economic performance design based on adaptive iterative learning control of MPC systems

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Abstract

An adaptive step iterative learning control (ASILC) strategy was developed for model predictive control (MPC) system economic performance design. The strategy treats the functional relationship between the variable variances and the controller parameters as a combination of discrete linear intervals and uses process information in the last iteration to adaptively update the iteration step. This optimizes the economic performance step by step. The method is used to design an ethylene cracking furnace control system. Simulations show that ASILC converges to the optimal operating point faster than iterative learning control (ILC) and obtains the controller parameter λ for the optimal economic performance. After seven optimizations and iterations, the economic performance target was improved 28.92%.

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adaptive iterative learning control / economic performance design / model predictive control (MPC) / iterative step / ethylene cracking furnace

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WANG Zhenlei, LIU Xueyan, WANG Xin. Economic performance design based on adaptive iterative learning control of MPC systems[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(9): 1016-1024 https://doi.org/10.16511/j.cnki.qhdxxb.2016.24.024

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