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Article

Vibration Isolation and Alignment of Multiple Platforms on a Non-Rigid Supporting Structure

1
Vibration Engineering Section, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QJ, UK
2
Department of Signal Processing and Communications, Universidad de Alcalá, 28805 Alcalá de Henares, Spain
3
Center for Applied Dynamics Research, School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Actuators 2020, 9(4), 108; https://doi.org/10.3390/act9040108
Received: 25 August 2020 / Revised: 14 October 2020 / Accepted: 20 October 2020 / Published: 22 October 2020
In many applications comprised of multiple platforms with stringent vibration isolation requirements, several vibration isolators are employed to work in tandem. They usually must accomplish two objectives: (i) reduce the vibration level of each platform; and (ii) maintain the required alignment with respect to each other or with a fixed reference. If the isolators are located on a rigid supporting structure, the problem can be approached as a classical vibration isolation (VI) problem, in which an increase in damping implies a reduction of vibration level experienced by the platforms. However, there are an increasing number of scenarios in which the dynamic interaction between the isolator and the base structure has the potential to alter the system response and consequently degrade VI performance. In this work, a generalized method to analyze the combined VI and alignment problem, for multiple isolators located on a flexible supporting structure, is proposed. The dynamic interaction between the platforms and the isolators is considered in the control design, and it is proved employing two different functional values that the maximum damping solution is not always the best approach when the dynamics of the supporting structure are considered. Numerical simulations are presented to validate the theory developed and robustness of the proposed control approach is demonstrated. View Full-Text
Keywords: vibration control; active vibration isolation; dynamic interaction; multi-platform alignment vibration control; active vibration isolation; dynamic interaction; multi-platform alignment
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MDPI and ACS Style

Pérez-Aracil, J.; Pereira, E.; Aphale, S.S.; Reynolds, P. Vibration Isolation and Alignment of Multiple Platforms on a Non-Rigid Supporting Structure. Actuators 2020, 9, 108. https://doi.org/10.3390/act9040108

AMA Style

Pérez-Aracil J, Pereira E, Aphale SS, Reynolds P. Vibration Isolation and Alignment of Multiple Platforms on a Non-Rigid Supporting Structure. Actuators. 2020; 9(4):108. https://doi.org/10.3390/act9040108

Chicago/Turabian Style

Pérez-Aracil, Jorge, Emiliano Pereira, Sumeet S. Aphale, and Paul Reynolds. 2020. "Vibration Isolation and Alignment of Multiple Platforms on a Non-Rigid Supporting Structure" Actuators 9, no. 4: 108. https://doi.org/10.3390/act9040108

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