Mechanical resonance suppression technique for inertial reference unit based on band-pass filter disturbance observer.

Autor: Wang T; State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China. Electronic address: wangtianyu123@126.com., Tuo W; State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; Taihu Laboratory of Deepsea Technological Science, Wuxi 214000, China. Electronic address: tuoweixiao@tju.edu.cn., Li X; State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; Taihu Laboratory of Deepsea Technological Science, Wuxi 214000, China. Electronic address: lixftju@hotmail.com., He M; State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China. Electronic address: mengjie_he1124@tju.edu.cn., Gao X; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300133, China. Electronic address: gxq@stu.tjcu.edu.cn.
Jazyk: angličtina
Zdroj: ISA transactions [ISA Trans] 2024 Dec; Vol. 155, pp. 337-345. Date of Electronic Publication: 2024 Oct 22.
DOI: 10.1016/j.isatra.2024.10.011
Abstrakt: Inertial reference unit (IRU) has been recognized as an effective method for photoelectric tracking and pointing system to suppress the disturbance. Its flexible support usually results in a low-frequency mechanical resonance within the bandwidth. Experimental identification indicates an obvious resonant peak at near 36.7 Hz with an amplitude of 26.6 dB. In this paper, disturbance observer based on band-pass filter (BPF-DOB) is combined with a notch filter to suppress the mechanical resonance. The asymmetry of the resonance peak and variation of the controlled object over the time are both addressed. Simulation and experimental results show that the stability accuracy of IRU system is improved to be 1.09 μrad, indicating an improvement of 9.9 % relative to the traditional method and high robustness for time-varying resonance.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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