Semi-active control of isolated and damaged structures using online damage detection

Amini, Fereidoun; Mohajeri, Seyed Ahmad; Javanbakht, Majd

doi:10.1088/0964-1726/24/10/105002

Cited by 23 publications

(17 citation statements)

References 24 publications

(11 reference statements)

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“…Substituting from Eqs. (20) and (22), and using the matching conditions, it leads to: 6. Adopted aluminum structure with active elements.…”

Section: Reconfiguration Mechanismmentioning

confidence: 99%

“…These two subsystems were independently operated in the beginning and then, responding to challenges in the civil engineering area, progress has been made in improving the integration approach. New semi-active controllers have been proposed based on magneto-rheological dampers, using the output of the SHM module to update the respective controller parameters [17][18][19][20]. However, the increasing demands of larger and lightweight structures with high structural performance lead to the evolution of AVC methods and applications.…”

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confidence: 99%

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A reconfigurable damage-tolerant controller based on a modal double-loop framework

Genari

Mechbal

Coffignal

et al. 2017

Mechanical Systems and Signal Processing

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E.G.O. Nóbrega).performance and robustness for controlled systems. However, SHM and AVC methods are independently designed in general, despite the fact that damage may significantly affect the AVC performance. Aiming to overcome the controller performance decline due to damage, this paper presents a framework to design damage-tolerant active controllers for noncollocated flexible structures, based on a novel double-loop modal controller, which may be adaptively reconfigured in real time. The proposed methodology is inserted into a wide multidisciplinary, involving concepts of AVC, modal control, fault-tolerant control, adaptive control, and SHM, in order to mitigate structural damage effects.The integration between SHM and vibration control techniques has been receiving considerable attention in recent decades [10][11][12][13]. Initially, SHM and control techniques were integrated only in the design phase, with the respective strategy consisting in the simultaneous design of the SHM and control modules [14][15][16]. These two subsystems were independently operated in the beginning and then, responding to challenges in the civil engineering area, progress has been made in improving the integration approach. New semi-active controllers have been proposed based on magneto-rheological dampers, using the output of the SHM module to update the respective controller parameters [17][18][19][20]. However, the increasing demands of larger and lightweight structures with high structural performance lead to the evolution of AVC methods and applications. Despite semi-active controllers intrinsic stability, which represents an advantage for several cases, AVC strategies provide better performance than the passive and the semi-active approaches in structural vibration control [21,22]. After almost two decades of research, the integration of the SHM and the AVC approaches is still a challenge, and regular AVC methods rarely consider, as a design requirement, damage effect mitigation in structural vibrations.Damage-tolerant active control (DTAC) is a recent research area that has intersections with both fault-tolerant control (FTC) and AVC areas. Specific fault detection and isolation techniques are used by fault-tolerant controllers to provide online parameter adaptation aiming to maintain an adequate performance for controlled systems [23][24][25]. In the same way, DTAC methods use SHM to design controllers presenting damage-tolerant performance. DTAC methods may be considered an extension of FTC, focusing fundamentally on structural vibration control and aiming to expand the applicability of modern smart structures. However, adapting FTC methods to face damage-induced vibration in flexible structures leads to new challenges. The infinite number of structural vibration modes, which constitutes the beginning of the DTAC research area, demands a controller robustness that is complicated by the dynamic changes due to damage perturbation [3]. The literature regarding vibration control of structures subject to damage is limited. Cha...

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“…Substituting from Eqs. (20) and (22), and using the matching conditions, it leads to: 6. Adopted aluminum structure with active elements.…”

Section: Reconfiguration Mechanismmentioning

confidence: 99%

mentioning

confidence: 99%

A reconfigurable damage-tolerant controller based on a modal double-loop framework

Genari

Mechbal

Coffignal

et al. 2017

Mechanical Systems and Signal Processing

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“…A control system usually refers to control algorithms (e.g., active control, semi‐active control, hybrid control, and passive control) and the corresponding controlling devices (e.g., semi‐control hydraulic dampers and active‐control piezoelectric actuators). Among various control algorithms, semi‐active control systems exhibit their attractive characteristics, including less power, higher reliability, and particularly higher adaptability for earthquake events, as compared to their counterparts . As a result, semi‐active control systems and the associated devices have played an important role in structural vibration controls and mitigations.…”

Section: Introductionmentioning

confidence: 99%

“…Among various control algorithms, semi-active control systems exhibit their attractive characteristics, including less power, higher reliability, and particularly higher adaptability for earthquake events, as compared to their counterparts. [25,26,[28][29][30][31] As a result, semi-active control systems and the associated devices have played an important role in structural vibration controls and mitigations.…”

Section: Introductionmentioning

confidence: 99%

Improved semi-active control algorithm for hydraulic damper-based braced buildings

Azimi

Rasoulnia

Lin

et al. 2017

Struct Control Health Monit

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Summary Much research has been conducted on structural control systems to improve the seismic performance of structures under earthquakes and, ultimately, offer high performance‐resilient buildings beyond life risk mitigation. Among various structural control algorithms, semi‐active control strategies have been widely accepted for overcoming some limitations existed in either passive or active control systems, thereby leading to better structural performance over their counterparts. In this study, a new semi‐active control algorithm with minimum control parameters is developed to drive the hydraulic damper for effective control of the dynamic deformation of low‐ and high‐rise building structures under earthquake loadings. The new controller allows less input and computation for determining the damping coefficient of the hydraulic dampers while maintaining a higher performance. V‐braced buildings with three varying heights are used as prototypes to demonstrate the effectiveness of the proposed semi‐active damper. Two critical parameters, maximum drift and acceleration of stories, are defined for the performance criteria. The simulation results show that the developed semi‐active damper can significantly improve the seismic performance of the buildings in terms of controlled story drift and acceleration. By use of less input and reduced time delay effects, the proposed control system is comparable with those of existing semi‐active controllers. The findings in this study will help engineers to design control systems for seismic risk mitigation and effectively facilitate the performance‐based seismic design.

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“…For example, a probabilistic approach integrating the identification uncertainty for the control purpose has been proposed (Yuen et al., ). A new scheme has been presented to develop a smart structure using integrated MR dampers, with a fuzzy logic controller, and an online damage detection method based on identified system Markov parameters, by considering all DOFs, in order to reduce both damage and dynamic response in a braced frame structure (Karami and Amini, ) and a building structure with base isolation system (Amini et al., ).…”

Section: Introductionmentioning

confidence: 99%

Developing a Smart Structure Using Integrated Subspace‐Based Damage Detection and Semi‐Active Control

Karami

Akbarabadi

2016

Computer aided Civil Eng

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Damage detection in large building structures has always faced challenges due to analyzing the large amount of measured data. In this article, a new damage detection approach based on subspace method is proposed to identify damages using limited output data. Also, a new scheme is presented to develop a smart structure by integrating structural health monitoring with semi-active control strategy. If damage occurs in such a structure under severe excitations, the proposed scheme has the capability to exert necessary control forces in order to compensate for damage and reduce simultaneously the dynamic response of the structure. The reliability and feasibility of the proposed method are demonstrated by implementing the technique to two shear building structures with semi-active control devices. Results show that the damage could be identified accurately with saving time and cost due to less computation even under noise existence; and dynamic response is significantly reduced in the smart structure.

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Semi-active control of isolated and damaged structures using online damage detection

Cited by 23 publications

References 24 publications

A reconfigurable damage-tolerant controller based on a modal double-loop framework

A reconfigurable damage-tolerant controller based on a modal double-loop framework

Improved semi-active control algorithm for hydraulic damper-based braced buildings

Developing a Smart Structure Using Integrated Subspace‐Based Damage Detection and Semi‐Active Control

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