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Robust Approximation-Based Event-Triggered MPC for Constrained Sampled-Data Systems

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Abstract

In this paper, an approximation-based event-triggered model predictive control (AETMPC) strategy is proposed to implement event-triggered model predictive control for continuous-time constrained nonlinear systems under the digital platform. In the AETMPC strategy, both of the optimal control problem (OCP) and the triggering conditions are defined in a discrete-time manner based on approximate discrete-time models, while the plant under control is continuous time. In doing so, sensing load is alleviated because the triggering condition does not need to be checked continuously, and the computation of the OCP is simpler since which is calculated in the discrete-time framework. Meanwhile, robust constraints are satisfied in a continuous-time sense by taking inter-sampling behavior into consideration, and a novel constraint tightening approach is presented accordingly. Furthermore, the feasibility of the AETMPC strategy is analyzed and the associated stability of the overall system is established. Finally, this strategy is validated by a numerical example.

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Correspondence to Yu Kang.

Additional information

This paper was supported by the National Key Research and Development Program of China under Grant Nos. 20I8AAA0I00800 and 20I8YFE0I06800, the National Natural Science Foundation of China under Grant Nos. 61725304, 6I67336I, 61673350 and 61422307, the Science and Technology Major Project of Anhui Province under Grant No. 9I2I98698036, the Chinese Academy of Sciences, the Youth Top-notch Talent Support Program and the Youth Yangtze River Scholar, and the Project funded by China Postdoctoral Science Foundation under Grand No. 2020M682036.

This paper was recommended for publication by Editor GUO Jin.

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Wang, T., Kang, Y., Li, P. et al. Robust Approximation-Based Event-Triggered MPC for Constrained Sampled-Data Systems. J Syst Sci Complex 34, 2109–2124 (2021). https://doi.org/10.1007/s11424-021-0073-9

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  • DOI: https://doi.org/10.1007/s11424-021-0073-9

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