Abstract
This study deals with the irregular linear quadratic control problem governed by continuous time system with time delay. Linear quadratic (LQ) control for irregular Riccati equation with time delay remains challenging since the controller could not be solved from the equilibrium condition directly. The merit of this paper is that based on a new approach of ‘two-layer optimization’, the controller entries of irregular case with time delay are deduced from two equilibrium conditions in two different layers, which is fundamentally different from the classical regular LQ control. The authors prove that the irregular LQ with time delay is essentially different from the regular case. Specifically, the predictive controller bases on the feedback gain matrix and the state is given in the last part. The presented conclusions are completely new to our best knowledge. Examples is presented to show the effectiveness of the proposed approach.
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Acknowledgements
We thank Professor Huanshui Zhang of Shandong University for his guidance and suggestions. The authors would like to thank the associate editor and the reviewers for their constructive comments and suggestions which improved the quality of the paper.
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This research was supported by the Natural Science Foundation of Shandong Province under Grant Nos. ZR2018MF019 and ZR2019MF052, the National Natural Science Foundation of China under Grant No. 61873179.
This paper was recommended for publication by Editor SUN Jian.
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Li, T., Li, L., Lei, J. et al. The Irregular Linear Quadratic Control Problem for Deterministic Case with Time Delay. J Syst Sci Complex 34, 642–656 (2021). https://doi.org/10.1007/s11424-020-9136-6
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DOI: https://doi.org/10.1007/s11424-020-9136-6