Twin Rotor Damper for Human-Induced Vibrations of Footbridges

Terrill, Richard; Bäumer, Richard; Nimmen, Katrien Van; Broeck, Peter Van den; Starossek, Uwe

doi:10.1061/(asce)st.1943-541x.0002654

Cited by 11 publications

(8 citation statements)

References 32 publications

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“…An AVA system basically comprises: (i) the actuator(s), which transmits controlled forces to the target structure so as to minimize its vibrations, (ii) the control system, which calculates in real-time the command (voltage) signal to the actuator, so that the target forces are developed and (iii), the sensors located on the structure, which provide the kinematic information (usually acceleration) required for the controller to calculate the command signal. Several morphologies of actuators have been employed for active vibration control, some examples are electromagnetic proof-mass actuators (Casado et al, 2013;Zhang and Ou, 2015;Mao and Huang, 2019), pneumatic muscle actuators (Bleicher et al, 2011), and multiple rotating-mass actuators (Terrill et al, 2020), amongst others.…”

Section: Introductionmentioning

confidence: 99%

Interaction Phenomena to Be Accounted for Human-Induced Vibration Control of Lightweight Structures

Díaz

Gallegos

Senent

et al. 2021

Front. Built Environ.

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Inertial mass controllers, including passive, semi-active and active strategies, have been extensively used for canceling human-induced vibrations in lightweight pedestrian structures. Codes to check the vibration serviceability and current controller design approaches assume that both excitation forces and controller forces are the same on a flexible structure and on a rigid structure. However, this fact may not be assumable since interaction phenomena arise even for moderately lightweight structures. Analyzing two case studies in this paper, interaction phenomena involved in the frequency-domain-based design of passive and active inertial mass dampers are discussed. Thus, a general vibration control problem including the interaction phenomena is set hereby. Concretely, this paper deeply discusses the following issues: (i) how the structure to be controlled is affected when human-structure interaction is presented for deterministic and stochastic conditions, (ii) the closed-loop transfer function of the controlled structure including a passive inertial mass damper, and (iii) the closed-loop transfer function of the controlled structure including an active inertial mass damper. In addition, the performed analysis considers the actuator dynamics and the actuator-structure interaction.

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Section: Introductionmentioning

confidence: 99%

Interaction Phenomena to Be Accounted for Human-Induced Vibration Control of Lightweight Structures

Díaz

Gallegos

Senent

et al. 2021

Front. Built Environ.

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“…Besides, the closed-loop control18 and applications in human-induced vibrations suppression of footbridges of TRD were also studied. 19 For linear AMD, exceeding physical limits of actuators may trigger nonlinearity consequentially and impair the control performance of the system or even lead to device damage. 20,21 Therefore, limited stroke should be considered in controller designing for AMD system.…”

Section: Introductionmentioning

confidence: 99%

“…The greatest advantage of TRD is its low power demand when operated in the continuous rotation mode. Besides, the closed‐loop control18 and applications in human‐induced vibrations suppression of footbridges of TRD were also studied 19 …”

Section: Introductionmentioning

confidence: 99%

Modeling and nonlinear optimal control of active mass damper with rotating actuator for structural vibration control

Zhang

et al. 2021

Structural Contr & Hlth

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An innovative nonlinear optimal control scheme based on θ-D approximation for structural vibration control with R-AMD (active mass damper with rotating actuator) is developed in this paper. In the R-AMD which was proposed in our previous work, rotating actuator rather than linear actuator is used to accelerate and decelerate the inertial mass, thus avoiding stroke-related problems. The rotational motion of the inertial mass makes R-AMD a special nonlinear AMD, which raises the level of difficulty in controller designing. Taking the control-structure interaction (CSI) effect into consideration, the modeling of target structure/R-AMD coupled system is fulfilled using the Lagrange equations. Regarding the nonlinearity in the R-AMD system, a nonlinear optimal control scheme is designed based on θ-D approximation, during which the important role of diffeomorphism transformation of coordinates is presented. Experiments are conducted to validate the effectiveness of the proposed control algorithm and the R-AMD device.

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“…Furthermore, uncertainties affecting the dynamic characteristics of the structure in its “as‐built” configuration (e.g., uncertainties affecting the structural damping or natural frequencies) can lead to the detuning of the designed TMD, something that dramatically drops the TMD effectiveness 5 . Alternative devices with some potential for multimodal vibration control have been recently proposed in literature to improve the performances of classical TMDs, but their development is currently still focused on single‐mode control 6 …”

Section: Introductionmentioning

confidence: 99%

“…In the best of the authors' knowledge, the only literature paper proposing a device that is similar to the TMDI for vibration suppression in footbridges is the above‐mentioned work by Terrill et al, 6 where an active device named twin rotor damper (TRD) is implemented in an existing footbridge to control vibrations. The TRD is ideally able to control more than one vibration mode of the structure by appropriate calibration of the control algorithm, and the rotating masses provide some “mass amplification” effect similar to the one exerted by the inerter in TMDIs.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of the ideal grounded tuned mass damper inerter for comfort performances improvement in footbridges with practical implementation considerations

Angelis

Petrini

Pietrosanti

2021

Structural Contr & Hlth

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Summary The paper focuses on the optimal design of the grounded tuned mass damper inerter (TMDI) in footbridges and on some practical implementation issues. An optimal design procedure is implemented for the perfectly grounded ideal TMDI (infinite stiffness of the connection at the ground plus linear and nondissipative inerter). The procedure is based on reduced‐order models of the footbridge by assuming the frequency ratio and damping factor as design parameters, for a given number of values of the TMDI the inertance and mass ratios aiming at minimizing the maximum acceleration response of the system for users' comfort improvement under performance criteria defined in Human‐induced Vibration of Steel Structures (HiVoSS) guidelines. The procedure is applied to an existing footbridge suffering excessive human‐induced vibrations. After the optimal design of the TMDI has been found, its performances are assessed by the avail of a fully 3D finite element model of the case‐study footbridge, which has been calibrated toward an in situ experimental identification campaign. Alternative proposals for practical implementation of the control system are analyzed. Finally, a performance sensitivity analysis is carried out regarding the deviations from the initial assumption of perfectly grounded TMDI system, by varying the stiffness of the connection at the ground of the ideal inerter. Results show that the proposed procedure makes the TMDI a very efficient control system for footbridges and that changes of the stiffness of the grounded connection drop the beneficial effect of the TMDI, also if consequences of such errors are less than the ones occurring in classical TMDs for detuning or malfunctioning.

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Twin Rotor Damper for Human-Induced Vibrations of Footbridges

Cited by 11 publications

References 32 publications

Interaction Phenomena to Be Accounted for Human-Induced Vibration Control of Lightweight Structures

Interaction Phenomena to Be Accounted for Human-Induced Vibration Control of Lightweight Structures

Modeling and nonlinear optimal control of active mass damper with rotating actuator for structural vibration control

Optimal design of the ideal grounded tuned mass damper inerter for comfort performances improvement in footbridges with practical implementation considerations

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