A new method for online identification of civil structures: Virtual synchronization

Ghaderi, Pedram; Amini, Fereidoun

doi:10.1002/acs.2948

Cited by 10 publications

(15 citation statements)

References 26 publications

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“…Consequently, it is vital to estimate stiffness values of the structure in a relatively short duration at the beginning of the external excitation. In this regard, VSM 6 is a new approach for real-time identification of stiffness and viscous damping coefficients of the civil structure subjected to external excitations. Measured displacement and velocity vectors of the structure are required for defining a virtual system that is analogous to the actual structure.…”

Section: Virtual Synchronization Methodsmentioning

confidence: 99%

“…More details on the calibration of VSM's internal parameters can be found in the literature. 6 This problem can be addressed by employing properly designed measurement noise filters.…”

Section: Identification Of Structures Using Vsmmentioning

confidence: 99%

“…[3][4][5] Among online system identification approaches, virtual synchronization method (VSM) is a novel online system identification technique that is capable of identifying stiffness and viscous damping coefficients of civil structures in real-time by creating a virtual system which is similar to the actual structure. 6 The formulation and remarkable features of this method are discussed in section 3.1. Although much progress has been made in health monitoring and vibration control areas, most of the investigations studied these two research areas separately with regard to the main goal pursued.…”

Section: Introductionmentioning

confidence: 99%

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Smart vibration control of structures with unknown structural parameters using integratedvirtual synchronization method/linear‐quadratic regulatorapproach

Ghaderi

Goshtaei

2020

Adv Control Appl

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Although vibration control and health monitoring of structures have been treated separately in recent years, it will be beneficial to integrate these two systems and develop a smart structure with its own sensors, processors, and actuators. In this article, an integrated virtual synchronization method/linear‐quadratic regulator (VSM/LQR) approach for system identification and vibration control of structures with unknown physical parameters is proposed. First, based on the measured state of the structure, the unknown structural parameters are estimated using the VSM in a relatively short duration. The estimated parameters are then employed to determine optimal control forces for the purpose of the vibration control. The feasibility and effectiveness of the proposed approach are numerically examined through the time‐history analysis of two shear‐type frames with unknown stiffness coefficients. The results from the numerical investigation of the example structures demonstrate that the proposed method is effective in the vibration attenuation of structures with unknown parameters. Moreover, it was shown that the proposed VSM/LQR approach is more promising for addressing unknown structural parameters than the recursive least square method and conventional LQR method.

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Section: Virtual Synchronization Methodsmentioning

confidence: 99%

“…More details on the calibration of VSM's internal parameters can be found in the literature. 6 This problem can be addressed by employing properly designed measurement noise filters.…”

Section: Identification Of Structures Using Vsmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Smart vibration control of structures with unknown structural parameters using integratedvirtual synchronization method/linear‐quadratic regulatorapproach

Ghaderi

Goshtaei

2020

Adv Control Appl

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“…In this paper the formulation of the recently introduced Virtual Synchronization Method (VSM) [33] is extended for online identification of damping properties in seismically excited structures. The proposed method solves a coupled synchronization/identification problem developed for different structural damping models.…”

Section: Introductionmentioning

confidence: 99%

“…1 The original VSM is only shown to work with harmonic excitations [33]. This is a serious limitation for structural engineering applications.…”

Section: Introductionmentioning

confidence: 99%

First‐order virtual synchronization: A new methodology for online identification of structural damping in presence of seismic excitation

Ghaderi

2020

Asian Journal of Control

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This paper proposes a new method for online identification of damping properties in seismically excited structures. It is a major extension of the recently developed Virtual Synchronization Method (VSM) with the following benefits:Its formulation is simpler and contains fewer design parameters. It includes a sufficient condition which can be validated online to ensure whether it is successful in identification of the structural damping model. It is assumed that the parameters of the damping model are fully unknown whereas the stiffness and mass of the structure are known. Online measurements of the ground motion acceleration, displacement and velocity vectors are available. Using these data, a virtual copy of the original structure is created. Then, the error between the states of the two systems is calculated. It is employed for designing an appropriate virtual controller which forces the virtual system to synchronize with the original one. Consequently, the states of these two systems are used to propose a nonlinear adaptive law to estimate the unknown parameters of the damping model. Provided numerical examples show that the proposed online identification method is efficiently fast, promising and worthy of further studies.

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Improved synchronization-based approach for online damage detection of civil structures

Amini

Moradmand

2020

Engineering with Computers

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A new method for online identification of civil structures: Virtual synchronization

Cited by 10 publications

References 26 publications

Smart vibration control of structures with unknown structural parameters using integratedvirtual synchronization method/linear‐quadratic regulatorapproach

Smart vibration control of structures with unknown structural parameters using integratedvirtual synchronization method/linear‐quadratic regulatorapproach

First‐order virtual synchronization: A new methodology for online identification of structural damping in presence of seismic excitation

Improved synchronization-based approach for online damage detection of civil structures

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