Abstract
This paper studies a continuous-time stochastic \(H_{2}/H_{\infty }\) control problem for mean-field stochastic differential systems, with random initial value and diffusion coefficients depending explicitly on the state, control and disturbance as well as their expectations. A mean-field stochastic bounded real lemma is first established, characterizing the equivalence between \(H_{\infty }\) robust stability and the solvability of two indefinite differential Riccati equations. Based on this extremely useful result, an equivalent condition for the existence of \(H_{2}/H_{\infty }\) controller is proposed by utilizing the solution of two sets of cross-coupled indefinite Riccati equations. Moreover, when an \(H_{2}/H_{\infty }\) controller exists, both the optimal control input and the corresponding worst-case disturbance admit linear feedback representations of the state and its mathematical expectation.
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Acknowledgements
This work of third author was supported by the National Natural Science Foundation of China (Nos. 12271158 and 11871121), the Key Projects of Natural Science Foundation of Zhejiang Province, China (No. LZ22A010005) and the Natural Science Foundation of Zhejiang Province, China (No. LY21A010001).
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Communicated by Nikolai Osmolovskii.
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Wang, M., Meng, Q., Shen, Y. et al. Stochastic \(H_{2}/H_{\infty }\) Control for Mean-Field Stochastic Differential Systems with (x, u, v)-Dependent Noise. J Optim Theory Appl 197, 1024–1060 (2023). https://doi.org/10.1007/s10957-023-02220-5
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DOI: https://doi.org/10.1007/s10957-023-02220-5
Keywords
- \(H_{2}/H_{\infty }\) control
- Stochastic bounded real lemma
- Mean-field
- Indefinite Riccati differential equations