Design of a novel state-feedback robust $$H_2/H_{\infty }$$ sliding-mode controller for a hydraulic turbine governing system
Abstract This paper presents a novel state-feedback robust sliding-mode controller (SFRSMC) based on a mixed $$H_2/H_{\infty }$$ H 2 / H ∞ approach to enhance the control performance of hydraulic turbine governing systems (HTGS) with complex conduit systems under external load disturbances and contr...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-79493-x |
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| Summary: | Abstract This paper presents a novel state-feedback robust sliding-mode controller (SFRSMC) based on a mixed $$H_2/H_{\infty }$$ H 2 / H ∞ approach to enhance the control performance of hydraulic turbine governing systems (HTGS) with complex conduit systems under external load disturbances and control signal uncertainties. A state-space model incorporating the dynamic responses of the HTGS is developed. The SFRSMC is designed using the sliding-mode equivalent control principle, with a disturbance observer to estimate and mitigate unknown disturbances. To balance robustness and optimality, mixed $$H_2/H_{\infty }$$ H 2 / H ∞ linear matrix inequalities (LMIs) are utilized to determine the critical performance sliding matrix via an auxiliary feedback control method. The effectiveness of the proposed control scheme is validated through time-domain simulations under various operating scenarios, including different parameter variations of the HTGS. |
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| ISSN: | 2045-2322 |