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Type: Artigo
Title: A Reconfigurable Damage-tolerant Controller Based On A Modal Double-loop Framework
Author: Genari
Heloi F. G.; Mechbal
Nazih; Coffignal
Gerard; Nobrega
Euripedes G. O.
Abstract: Active vibration control of flexible structures has received considerable attention in the latest decades. However, several related control problems remain open to new investigations such as robust performance, spillover instability, and structural changes due to damage. Specifically in the case of damage, it may significantly aggravate closed-loop performance. Damage-tolerant active control is a recent research area that includes structural damage effect reduction in the controller design requirements. This paper presents a novel control method based on a modal double-loop controller design, aiming for vibration reduction of noncollocated flexible structures subject to damage and encompassing online reconfigurability. The first controller is designed for the healthy system in order to comply with predefined performance and robustness requirements, based on modal H-infinity norm. The second controller complements the closed-loop performance if the structure is damaged. A reconfigurable modal technique is adopted to design the second controller, using online modal structural parameter change information to update the controller. To assess the proposed method, finite element models are developed for a case study structure, including health and damage conditions. Results show the effectiveness of the methodology along with performance improvement compared to single-loop controllers based on regular H-infinity and modal H-infinity approaches. (C) 2016 Elsevier Ltd. All rights reserved.
Subject: Damage-tolerant Active Control
Adaptive Modal Control
Modal H-infinity Control
Modal Double-loop Control
Active Vibration Control
Editor: Academic Press Ltd- Elsevier Science Ltd
Citation: Mechanical Systems And Signal Processing. Academic Press Ltd- Elsevier Science Ltd, v. 88, p. 334 - 353, 2017.
Rights: fechado
Identifier DOI: 10.1016/j.ymssp.2016.11.015
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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