A New Extended State Observer with Low Sensitivity to High Frequency Noise and Low Gain Power. Issue 2 (2020)

• Record Type: Journal Article
• Authors: Li, Xiaoyang; Xia, Hao
• Is Part Of: IFAC-PapersOnLine. Volume 53:Issue 2(2020)
• Page Start: 4929
• Page End: 4934
• Publication Date: 2020
• Subjects: Extended state observer -- measurement noise -- low gain power; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2020.12.1072
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: Linear Extended State Observer (LESO) with a large gain wo leads to faster estimation error convergence. But a high gain LESO is sensitive to high frequency measurement noise and its digital implementation is rather complex. To address the above issues, for a given n-th order plant, a new 2n-th order extended state observer is proposed. The proposed observer, while preserving the fast convergence property of LESO, has a lower gain power of 2 and is less sensitive to high frequency measurement noise. And the new observer can be easily tuned with gain ωo .