Semi-Active Control of Friction Dampers

Dupont, Pierre E.; Kasturi, Prakash S.; Stokes, Ann

doi:10.1006/jsvi.1996.0798

Cited by 66 publications

(39 citation statements)

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“…In this example, Dupont, Kasturi & Stokes (1997) performed numerical and experimental tests on semi-active control of friction dampers. They proposed control laws to maximise the instantaneous energy dissipation of the friction dampers.…”

Section: Semi-active Friction Dampingmentioning

confidence: 99%

“…Using this model, Dupont et al (1997) derived several control laws to maximise energy dissipation at the interface. Three control laws were then simulated and compared using the idealised system shown below.…”

Section: Semi-active Friction Dampingmentioning

confidence: 99%

“…Three control laws were then simulated and compared using the idealised system shown below. (Dupont et al 1997) The control laws were then tested experimentally. A double-shear friction device was designed specially for this purpose.…”

Section: Semi-active Friction Dampingmentioning

confidence: 99%

“…The test inputs were provided by a servo-hydraulic Materials Testing Machine (MTM) and the normal force was modulated using piezoelectric stack actuators. (Dupont et al 1997) …”

Section: Semi-active Friction Dampingmentioning

confidence: 99%

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Active Vibration Control

Palazzolo

2016

Vibration Theory and Applications With Finite Elements and Active Vibration Control

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Section: Semi-active Friction Dampingmentioning

confidence: 99%

Section: Semi-active Friction Dampingmentioning

confidence: 99%

Section: Semi-active Friction Dampingmentioning

confidence: 99%

“…The test inputs were provided by a servo-hydraulic Materials Testing Machine (MTM) and the normal force was modulated using piezoelectric stack actuators. (Dupont et al 1997) …”

Section: Semi-active Friction Dampingmentioning

confidence: 99%

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Active Vibration Control

Palazzolo

2016

Vibration Theory and Applications With Finite Elements and Active Vibration Control

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“…Seismic isolation based on friction was proven be a very useful solution for large civil structures [2]. In most cases, friction dampers had been studied in a passive way, however, a significant improvement can be achieved by controlling the normal force in the dampers [3]. Friction dampers with variable normal force are classified as semi-active devices and their appeal is to have performance levels rivalling the active devices with low level of energy consumption [4].…”

Section: Introductionmentioning

confidence: 99%

Control strategies for friction dampers: numerical assessment and experimental investigations.

Coelho

Santos

Neto

et al. 2014

MATEC Web of Conferences

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Abstract. The use of friction dampers has been proposed in a wide variety of mechanical systems for which it is not possible to apply viscoelastic materials, fluid based dampers or others viscous dampers. An important example is the application of friction dampers in aircraft engines to reduce the blades vibration amplitudes. In most cases, friction dampers have been studied in a passive way, however, a significant improvement can be achieved by controlling the normal force in the dampers. The aim of this paper is to study three control strategies for friction dampers based on the hysteresis cycle. The first control strategy maximizes the energy removal in each harmonic oscillation cycle, by calculating the optimum normal force based on the last displacement peak. The second control strategy combines the first one with the maximum energy removal strategy used in the smart spring devices. Finally, is presented the strategy which homogenously modulates the friction force. Numerical studies were performed with these three strategies defining the performance metrics. The best control strategy was applied experimentally. The experimental test rig was fully identified and its parameters were used for the numerical simulations. The obtained results show the good performance for the friction damper and the selected strategy.

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Predictive control of seismic structures with semi‐active friction dampers

2004

Earthq Engng Struct Dyn

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SUMMARYIn this paper a predictive control method especially suitable for the control of semi-active friction dampers is proposed. By keeping the adjustable slip force of a semi-active friction damper slightly lower than the critical friction force, the method allows the damper to remain in its slip state throughout an earthquake of arbitrary intensity, so the energy dissipation capacity of the damper can be improved. The proposed method is formulated in a discrete-time domain and cast in the form of direct output feedback for easy control implementation. The control algorithm is able to produce a continuous and smooth slip force for a friction damper and thus avoid exerting the high-frequency structural response that usually exists in structures with conventional friction dampers. Using a numerical study, the control performance of a multiple degrees of freedom (DOF) structural system equipped with passive friction dampers and semi-active dampers controlled by the proposed method are compared. The numerical case shows that by merely using a single semi-active friction damper and a few sensors, the proposed method is able to achieve better acceleration reduction than the case using multiple passive dampers.

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Semi-Active Control of Friction Dampers

Cited by 66 publications

References 0 publications

Active Vibration Control

Active Vibration Control

Control strategies for friction dampers: numerical assessment and experimental investigations.

Predictive control of seismic structures with semi‐active friction dampers

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