Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator

Wang, Jing; Wang, Lei; Jin, Peng; Zhang, Zhen; Li, Pengxuan; Xiao, Ritao

doi:10.3390/mi15030402

Open AccessArticle

Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator

by

Jing Wang

,

Lei Wang

^*

,

Peng Jin

,

Zhen Zhang

,

Pengxuan Li

and

Ritao Xiao

School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

^*

Author to whom correspondence should be addressed.

Micromachines 2024, 15(3), 402; https://doi.org/10.3390/mi15030402

Submission received: 6 February 2024 / Revised: 6 March 2024 / Accepted: 13 March 2024 / Published: 16 March 2024

(This article belongs to the Special Issue Development and Application of Advanced Precision Vibration Isolation Systems)

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Abstract

For vibration isolation systems, vibration suppression and platform positioning are both important. Since absolute velocity feedback causes difficulty in achieving positioning while suppressing vibration, an H∞ control strategy based on sensor fusion feedback is proposed in this paper. The signals of inertial and displacement sensors are fused through a pair of complementary filters. Thus, active control based on the fusion signal could concurrently achieve vibration and position control since it is a displacement signal. In addition, the obtained fusion signals have a lower noise level. In this way, simultaneous positioning and vibration suppression can be established using the sensor fusion strategy. On this basis, in order to obtain an optimal H∞ controller, system damping can be maximized by using the performance weight function to attenuate noise; the system bandwidth is determined by the uncertainty weight function, which can avoid the effect of high-frequency modes of the system. The effectiveness of the proposed strategy is verified by comparing it with the conventional absolute velocity feedback strategy on a 3-DOF isolator.

Keywords: vibration suppression; positioning; fusion signal; H∞ controller; 3-DOF isolator

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MDPI and ACS Style

Wang, J.; Wang, L.; Jin, P.; Zhang, Z.; Li, P.; Xiao, R. Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator. Micromachines 2024, 15, 402. https://doi.org/10.3390/mi15030402

AMA Style

Wang J, Wang L, Jin P, Zhang Z, Li P, Xiao R. Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator. Micromachines. 2024; 15(3):402. https://doi.org/10.3390/mi15030402

Chicago/Turabian Style

Wang, Jing, Lei Wang, Peng Jin, Zhen Zhang, Pengxuan Li, and Ritao Xiao. 2024. "Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator" Micromachines 15, no. 3: 402. https://doi.org/10.3390/mi15030402

APA Style

Wang, J., Wang, L., Jin, P., Zhang, Z., Li, P., & Xiao, R. (2024). Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator. Micromachines, 15(3), 402. https://doi.org/10.3390/mi15030402

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Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator

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