Improved shunt damping with two negative capacitances: An efficient alternative to resonant shunt

Berardengo, Marta; Thomas, Olivier; Giraud-Audine, Christophe; Manzoni, Stefano

doi:10.1177/1045389x16667556

Cited by 23 publications

(33 citation statements)

References 21 publications

(42 reference statements)

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“…Tuned mass damper performs well at the design point but are not very robust, and linear lanchester damper appears to be superior with relation to robustness. The same results hold for their electromechanical analogs [3,12].…”

Section: Introductionsupporting

confidence: 68%

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A comparison of robustness and performance of linear and nonlinear Lanchester dampers

2020

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In this paper, we study and compare performance and robustness of linear and non linear Lanchester dampers. The linear Lanchester damper consists of a small mass attached to a primary system through a linear dashpot, whereas the non linear Lanchester damper is linked to the primary mass through dry friction forces. In each case, we propose a semi-analytical method for computing the frequency response, for different values of the design parameters, in order to evaluate the performance and robustness of the two kinds of damper. Overall, it is shown that linear Lanchester dampers perform better than non linear damper both in terms of efficiency and robustness. Moreover, the non linear frequency response curves, that include the intrinsic non-smooth nature of the friction force, may serve as reference curve for further numerical studies.

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Section: Introductionsupporting

confidence: 68%

“…One can notice that the efficiency A dB of the linear Lanchester damper, if it has been carefully optimized with Eqs. (12) or (20), depends on only one parameter: the mass ratio µ.…”

Section: Direct Numerical Methods For Computing a Dbmentioning

confidence: 99%

A comparison of robustness and performance of linear and nonlinear Lanchester dampers

2020

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“…There are two conditions for the SP configuration because there are two NCs in the circuit. Notably, the conditions of equations (17) to (19) are equal to those found in Berardengo et al (2016b, 2017) for a resistive shunt coupled to NCs.…”

Section: Stability and Performancementioning

confidence: 94%

“…The series and SP NC layouts make the SC eigenfrequency shift towards increasingly lower frequency values (Berardengo et al, 2016b(Berardengo et al, , 2017De Marneffe and Preumont, 2008). When such a shift is high (i.e.…”

Section: Attenuation Performancementioning

confidence: 99%

“…Regarding the first point of the above list, recall that a piezoelectric actuator can be linked to a passive shunt impedance Z sh and NCs in three different ways: parallel, series and series + parallel (SP) (Berardengo et al, 2015b, 2016b, 2017), as explained in Figure 1(a) to (c) ( − C 1 denotes the IC NC in the parallel configuration, while − C 2 denotes the IC NC connected in series). The theoretical approach presented in Berardengo et al (2016b, 2017) can be fruitfully exploited to show that a common mathematical description can also be derived for the coupling between IC NCs and the resonant shunt, regardless of the type of NC connection used. This allows presenting brand-new formulations for the optimisation of the shunt impedance and for the prediction of the attenuation.…”

Section: Introductionmentioning

confidence: 99%

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Piezoelectric resonant shunt enhancement by negative capacitances: Optimisation, performance and resonance cancellation

Berardengo

Manzoni

Thomas

et al. 2018

Journal of Intelligent Material Systems and Structures

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This article addresses piezoelectric shunt damping through a resonant shunt associated with negative capacitances. The main objective of this article is to provide guidelines for choosing the best electrical circuit layout in terms of control performance and possible stability issues. This article proposes general analytical formulations for the tuning/optimisation of the electrical shunt impedance and for the prediction of the attenuation performance. These formulations are demonstrated to be valid for all the possible configurations of the negative capacitances. It is demonstrated that the behaviour of the different shunt circuits can indeed be described by a common mathematical treatment. Moreover, the use of two negative capacitances together is shown to provide benefits compared to traditional layouts based on a single negative capacitance. The mentioned advantages relate to both stability and attenuation performance. The use of a resonant shunt with the addition of negative capacitances is finally proven to provide enough attenuation to even cancel eigenfrequency peaks in some cases. This article also analyses the main issues arising from the practical implementation of the negative capacitances. Finally, the theoretical results are validated through experiments conducted on a cantilever beam coupled to two piezoelectric patches.

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Adaptive Multi-modal Tuned Mass Dampers Based on Shape Memory Alloys: Design and Validation

Berardengo

Porta

Manzoni

et al. 2019

Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting &Amp; Dynamic Environments Testing, Volume 7

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The use of shape memory alloys (SMA) is really promising in the field of vibration mitigation. Indeed, several works are already available in the literature, describing how to exploit the special features of SMAs in order to design and build dampers and tuned mass dampers (TMD).Regarding TMDs, the features of SMA materials allow to design adaptive TMDs able to change their eigenfrequencies in order to keep the TMD tuned on the primary system to be damped in case of changes of the dynamic features of the primary system (e.g. changes of the eigenfrequency due to thermal shifts). The possibility to ensure the tuning between the TMD and the primary system allows to achieve an optimal damping action.The adaptive TMDs based on SMAs described in the literature are usually able to work on a single eigenfrequency of the primary system. Conversely, this paper proposes a new adaptive TMD able to change more than one eigenfrequency at the same time with a given level of independence. This allows to work on at least two eigenfrequencies of the primary system, thus realizing a multi-modal adaptive TMD.The paper explains that this multi-modal adaptive TMD is based on a special configuration made from a system of masses and SMA wires. Particularly, each mass is connected to the adjacent masses by SMA wires. The possibility to tune more than one eigenfrequency is achieved by heating/cooling the different SMA wires independently. Indeed, this allows to change the geometry of the adaptive TMD and, at the same time, the tensile load into the SMA wires. This double effect is suitable for building multi-modal adaptive TMDs.The paper first describes the working principle of the adaptive TMD. Then, simulations are presented in order to show the effectiveness of the proposed device.

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Improved shunt damping with two negative capacitances: An efficient alternative to resonant shunt

Cited by 23 publications

References 21 publications

A comparison of robustness and performance of linear and nonlinear Lanchester dampers

A comparison of robustness and performance of linear and nonlinear Lanchester dampers

Piezoelectric resonant shunt enhancement by negative capacitances: Optimisation, performance and resonance cancellation

Adaptive Multi-modal Tuned Mass Dampers Based on Shape Memory Alloys: Design and Validation

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