A reconfigurable damage-tolerant controller based on a modal double-loop framework
Article dans une revue avec comité de lecture
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∞H∞ 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∞H∞ and modal H∞H∞ approaches.
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Article dans une revue avec comité de lectureGENARI, Helói F.G; MECHBAL, Nazih; COFFIGNAL, Gérard; NOBREGA, Euripedes (Elsevier, 2017)Damage-tolerant active control (DTAC) is a recent research area that encompasses control design methodologies resulting from the application of fault-tolerant control methods to vibration control of structures subject to ...
Article dans une revue avec comité de lectureGENARI, Helói F.G; MECHBAL, Nazih; COFFIGNAL, Gérard; NOBREGA, Euripedes (Elsevier, 2017)A new approach for vibration reduction of flexible structures subject to damage is here proposed, based on modal H∞H∞-norm control. Considering that structural damage provokes different effects on each vibration mode, the ...
Conférence invitéeMECHBAL, Nazih; NOBREGA, Euripedes (IFAC, 2012)Damage tolerant active control is a new research area relating to fault tolerant control design applied to mechanical structures. It encompasses several techniques already used to design controllers and to detect and to ...
Article dans une revue avec comité de lectureMECHBAL, Nazih; NOBREGA, Euripedes (Wiley-Blackwell, 2015)Damage tolerant active control is a new research area targeting to adapt fault tolerant control methods to mechanical structures submitted to damage. Active vibration control is a mature engineering area, using modern ...
Communication avec acteFENDZI, Claude; MOREL, Julien; REBILLAT, Marc; GUSKOV, Mikhail; MECHBAL, Nazih; COFFIGNAL, Gérard (2014)This paper examines an important challenge in ultrasonic structural health monitoring (SHM), which is the problem of the optimal placement of sensors in order to accurately detect and localize damages. The goal of this ...