Characterizing the nonlinear behavior of a pseudoelastic oscillator via the wavelet transform

Piccirillo, Vinícius; Balthazar, José Manoel; Tusset, Ângelo Marcelo; Bernardini, Davide; Rega, Giuseppe

doi:10.1177/0954406215589842

Cited by 20 publications

(9 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be observed in Figure 13, the de-energization of 0.5τ (10% of the energization time) did not generate a significant difference between the results obtained with the continuous energization of i=1.792, being an alternative to solve the problem of the continuous energization observed by Piccirillo et al. (2015).…”

Section: Torque Control Using Mrfmentioning

confidence: 76%

“…If a higher torque can also be observed, being that the torque variation for i=1.792 is -0.2418<TMR<0.2405, and to the torque variation for i=2 being-0.2297<TMR<0.2315, then, such torque is required to maintain the system, equation (9), with periodic behavior (Figure 12(a) and (b)). However, it is necessary to maintain the rotational MR damper energized with current i=1.792 continuously, which according to Piccirillo et al. (2015) is not intended for MR systems.…”

Section: Torque Control Using Mrfmentioning

confidence: 99%

See 1 more Smart Citation

On nonlinear dynamics of a parametrically excited pendulum using both active control and passive rotational (MR) damper

Tusset

Janzen

Piccirillo

et al. 2017

Journal of Vibration and Control

View full text Add to dashboard Cite

This paper presents two control strategies for a parametrically excited pendulum with chaotic behavior. One of them considers active control obtained by nonlinear saturation control (NSC) and the other a passive rotational magnetorheological (MR) damper. Firstly, the active control problem was formulated in order to design the external torque for the pendulum, considering the NSC. Numerical simulations were carried out in order to show the effectiveness of this method for the active control of the pendulum oscillation. The ability of the control of the proposed NSC in suppression of the chaotic behavior, considering the proposed parameters, was tested by a sensitivity analysis to parametric uncertainties. In the case of the passive rotational MR damper, firstly the influence of the introduction of the MR in a pendulum was performed considering the 0-1 test. Different electric currents are applied to suppress the chaotic behavior of the system. The numerical results showed that the simple introduction of a passive rotational MR damper without electric current did not change the chaotic behavior of the system. However, it is possible to keep the pendulum oscillating with periodic behavior using the rotational MR damper with energizing discontinuity.

show abstract

Section: Torque Control Using Mrfmentioning

confidence: 76%

Section: Torque Control Using Mrfmentioning

confidence: 99%

On nonlinear dynamics of a parametrically excited pendulum using both active control and passive rotational (MR) damper

Tusset

Janzen

Piccirillo

et al. 2017

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…The Wavelet transform is an important mathematical tool to analyze nonlinear systems and signals in the non-stationary regime. Some examples of the application of the Latin American Journal of Solids and Structures, 2019, 16(4), e179 11/20 wavelet transform in nonlinear systems are presented in Varanis et al (2018a,c); Piccirillo et al (2016). In addition, in the analysis made with the wavelet transform, the Mayer filter was used.…”

Section: Resultsmentioning

confidence: 99%

Modeling and Experimental Validation of Two Adjacent Portal Frame Structures Subjected to Vibro-impact

Varanis

Mereles

Silva

et al. 2019

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

In many engineering applications, there are systems that exhibit a series of collisions in a certain amount of time, for example the impact of floating ice in ships and the rubbing between stationary and rotary parts in turbomachinery. In many of these situations, it is of vital importance to know how the impacts affect the overall system behavior for the correct functioning or the prediction of faults in the system. This can be done by proposing models that can represent the system when it is subjected to sudden impacts in its oscillation movement. However, due to the nonlinear and non-smooth characteristic of the impact phenomenon, the implementation of impacts in mechanical systems may be a challenging task. In this manner, this paper aims in proposing a vibro-impact model of two adjacent portal frame structures, being one of them driven by an unbalanced DC motor positioned on top of it. The portal frames were modeled as continuous beams by means of the Euler-Bernoulli beam theory. In order to model the impact between the structures, three different models were considered: using the Hertz theory of elastic bodies to model the contact force using a nonlinear damping; using a spring and a damper in parallel, viscoelastic or spring-dashpot system, to model the force; and considering the impact to be instantaneous and using the coefficient of restitution to adjust the velocity after the contact. To validate the impact models, an experimental procedure was performed and the measurements compared with the simulations.

show abstract

“…The microscopic models treat phenomena on a molecular level, therefore the macroscopic phenomenological models are more attractive from practical point of view. In the literature one can find a lot of interesting and thorough description of SMAs [4][5][6][7][8][9][10] and their applications [11][12][13][14]. Different models of SMA give various results depending on nonlinear phenomenon which are taken into account.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of SMA micro-actuator in biomechanical system

et al. 2018

View full text Add to dashboard Cite

Abstract. In this paper the polynomial model of shape memory alloy is used to characterise properties of a micro-actuator which is applied as a new middle ear prosthesis. A two degrees of freedom model of the reconstructed middle ear is solve by means of multiple time scales method. The system has various behaviours near the primary resonance depending on ambient temperature. The special case when relative temperature θ = 1.0 characterises untypical resonance curve. Increasing temperature to the normal human body one the resonance curves are typical. Then the system has only one periodic solution if the excitation is not too strong.

show abstract

Characterizing the nonlinear behavior of a pseudoelastic oscillator via the wavelet transform

Cited by 20 publications

References 28 publications

On nonlinear dynamics of a parametrically excited pendulum using both active control and passive rotational (MR) damper

On nonlinear dynamics of a parametrically excited pendulum using both active control and passive rotational (MR) damper

Modeling and Experimental Validation of Two Adjacent Portal Frame Structures Subjected to Vibro-impact

Dynamics of SMA micro-actuator in biomechanical system

Contact Info

Product

Resources

About