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IEEE/CAA Journal of Automatica Sinica

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J. She, K. Miyamoto, Q.-L. Han, M. Wu, H. Hashimoto, and Q.-G. Wang, “Generalized-extended-state-observer and equivalent-input-disturbance methods for active disturbance rejection: Deep observation and comparison,” IEEE/CAA J. Autom. Sinica,. doi: 10.1109/JAS.2022.105929
Citation: J. She, K. Miyamoto, Q.-L. Han, M. Wu, H. Hashimoto, and Q.-G. Wang, “Generalized-extended-state-observer and equivalent-input-disturbance methods for active disturbance rejection: Deep observation and comparison,” IEEE/CAA J. Autom. Sinica,. doi: 10.1109/JAS.2022.105929

Generalized-Extended-State-Observer and Equivalent-Input-Disturbance Methods for Active Disturbance Rejection: Deep Observation and Comparison

doi: 10.1109/JAS.2022.105929
Funds:  This work was supported in part by the JSPS (Japan Society for the Promotion of Science) KAKENHI (20H04566, 22H03998); the National Natural Science Foundation of China (61873348); the Natural Science Foundation of Hubei Province, China (2020CFA031); and Wuhan Applied Foundational Frontier Project (2020010601012175)
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  • Active disturbance-rejection methods are effective in estimating and rejecting disturbances in both transient and steady-state responses. This paper presents a deep observation on and a comparison between two of those methods: the generalized extended-state observer (GESO) and the equivalent input disturbance (EID) from assumptions, system configurations, stability conditions, system design, disturbance-rejection performance, and extensibility. A time-domain index is introduced to assess the disturbance-rejection performance. A detailed observation of disturbance-suppression mechanisms reveals the superiority of the EID approach over the GESO method. A comparison between these two methods shows that assumptions on disturbances are more practical and the adjustment of disturbance-rejection performance is easier for the EID approach than for the GESO method.


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