Adaptive Passive Vibration Control

Franchek, Matthew A.; Ryan, Matthew W.; Bernhard, Robert J.

doi:10.1006/jsvi.1996.0037

Cited by 142 publications

(78 citation statements)

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“…The ADVA natural frequency range is chosen to accommodate the resonant frequencies of the building model to be controlled. The stiffness property of the helical spring [14] is given as (1) where k a is the spring stiffness, d is spring wire diameter, G is the modulus of rigidity of the spring material, D is the outer diameter and N is the number of coils required to give the needed stiffness. Given that the absorber frequency changes according to the building model resonant frequencies which are ω p1 , ω p2 and ω p3 , the stiffness of the ADVA can thus be changed accordingly.…”

Section: Theory Of Advamentioning

confidence: 99%

Active Dynamic Vibration Absorber for Broadband Control of a Multi-Mode System: Simulation and Experimental Verification

Ladipo

Muthalif

2012

Journal of Low Frequency Noise, Vibration and Active Control

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The control of broadband steady state vibration amplitude of a multi-mode system is presented. This objective is achieved using an Active Dynamic Vibration Absorber (ADVA). The stiffness property of the ADVA is adaptively tuned to attenuate the vibration of the multi-mode system at resonance. The ADVA detects the excitation frequency of the multi-mode system and calibrates its stiffness property to give the required stiffness for that mode. To implement the ADVA, a prototype model with low modal frequencies is designed. The equations of the steady state response of the multi-mode system with the attached ADVA are derived. The behavior of the prototype model when the ADVA is attached to different locations is used to determine the optimal location of the ADVA. The simulation result shows a reduction in the broadband of the multi-mode system. The result of the implementation of the ADVA reveals a 46% , 73% and 97% vibration amplitude reduction at first, second and third mode of the multi-mode system respectively.

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Section: Theory Of Advamentioning

confidence: 99%

Active Dynamic Vibration Absorber for Broadband Control of a Multi-Mode System: Simulation and Experimental Verification

Ladipo

Muthalif

2012

Journal of Low Frequency Noise, Vibration and Active Control

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“…Amongst the most reliable and effective control techniques is the use of Tuned Mass Dampers (TMDs) as energy absorbing devices. The TMD was firstly introduced in the engineering community by Frahm (1911) and since then a large number of studies have been published validating the applicability and enhanced performance for a combination of different TMD devices and configurations of structural systems (Xu et al, 1992;Ghosh and Basu, 2007;Casciati and Giuliano, 2009;Marian and Giaralis, 2014). While TMDs have been proven to be successful at alleviating structural response under generic dynamic loading, such devices being tuned to a single mode of the structure's vibration are limited to a narrow band of operating frequencies (Connor, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, Semi-Active-Tuned-MassDampers (STMDs) work on the basis of indirectly applying control forces to the structural system i.e., by varying the stiffness or damping of an element attached to the structure, using methods such as controlling the fluid discharge through an orifice or varying the magnetic field around a ferrous-fluid piston (i.e., Magneto-Rheological (MR) dampers). STMDs have shown comparable performance to ATMDs (Nagarajaiah, 2009), but have also the benefit of guaranteed bounded-input bounded output stability, lower power demand (an order of magnitude less power than the ATMD) (Nagarajaiah and Varadarajan, 2005) and low cost of implementation (Hrovat et al, 1983;Franchek et al, 1995;Nader, 2002).These factors, establish STMDs as an attractive alternative for use in most civil engineering structural systems.…”

Section: Introductionmentioning

confidence: 99%

Semi Active Tuned Mass Dampers of Buildings: A Simple Control Option

Demetriou¹,

Nikitas²,

Tsavdaridis

2015

American Journal of Engineering and Applied Sciences

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Abstract:The present study investigates the effectiveness of a ProportionalIntegral-Derivative (PID) controlled Variable Damping Semi-Active Tuned Mass Damper (VD-STMD) on reducing the vibration response of an earthquake excited multi-storey structure. The effectiveness of the controlled system is evaluated by comparing the structure's overall dynamic behavior against that of an equivalent similar structure equipped with a conventional optimally designed passive Tuned Mass Damper (TMD). The numerical simulations show that the structure equipped with the PID controlled VD-STMD has improved vibration attenuation metrics when compared to the one equipped with the optimal TMD. From the numerical simulations, it was also evident that when material degradation and structural damage is considered, the TMD becomes instantly de-tuned resulting in reduced vibration mitigation performance. On the contrary, the VD-STMD controlled system remains insensitive to the stiffness parametric variation, suggesting the suitability of such systems in structural applications sustaining damage or in general change.

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“…Therefore, the ATVA can be used to suppress the vibration of the primary system subject to the excitation of time-varying frequency. The design of ATVAs to adjust the natural frequency includes changing the number of active coils of a spring by Franchek et al, 6 varying the pressure of an air spring which is applied as the stiffness element of a dynamic vibration absorber 1 School of Automobile, Chang'an University, Xi'an, China 2 School of Electronic and Control Engineering, Chang'an University, Xi'an, China by Jin et al, 7 using smart materials, such as shape memory alloy by Williams et al 8 or magnetorheological elastomer by Deng and Gong, 9 and using variable mass by Gao et al 10 The control strategy for ATVA is also an important topic in absorber study fields. Most researchers have formulated the vibration control problem by adjusting the ATVA stiffness as a parametric control problem.…”

Section: Introductionmentioning

confidence: 99%

Simplified control strategy for resonance reduction of primary system

Han

Zhao

Gao

et al. 2015

Advances in Mechanical Engineering

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The tuned vibration absorber has become an effective device for vibration control in many engineering applications. However, using the tuned vibration absorber introduces a new resonance peak into the frequency response of the primary system and can actually increase the vibration of the primary system. We have proposed a control strategy based on variable mass adaptive tuned vibration absorber to reduce the resonance of the primary system in a previous study. However, this control plan is limited because it is difficult to obtain a key control parameter in some situations; therefore, it is difficult to implement in practical applications. Based on previous work, in this article, a simplified control strategy to reduce the resonance of the primary system with a vibration absorber attached is proposed that can easily obtain the approximation of this control parameter. A number of simulations and experiments have been carried out to test the performance of the new control plan. The results show that it is effective for reducing the resonance of the primary system with slight performance degradation of the vibration reduction, but the control parameter is much easier to obtain. The work is valuable for applications of the adaptive tuned vibration absorber on vibration control.

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Adaptive Passive Vibration Control

Cited by 142 publications

References 0 publications

Active Dynamic Vibration Absorber for Broadband Control of a Multi-Mode System: Simulation and Experimental Verification

Active Dynamic Vibration Absorber for Broadband Control of a Multi-Mode System: Simulation and Experimental Verification

Semi Active Tuned Mass Dampers of Buildings: A Simple Control Option

Simplified control strategy for resonance reduction of primary system

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