Nonlinear dynamics of shape memory alloy oscillators in tuning structural vibration frequencies

Wang, Linxiang; Melnik, Roderick

doi:10.1016/j.mechatronics.2012.09.004

Cited by 30 publications

(24 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SMA can be used in vibration attenuation [198], an actuator combined with a spring [48], etc. SMG can be used for soft gripping tools [61,62], smart lenses [63] and smart buttons [64].…”

Section: Other Applicationsmentioning

confidence: 99%

Flexible Medical Devices: Review of Controllable Stiffness Solutions

2017

View full text Add to dashboard Cite

Abstract:In the medical field and in soft robotics, flexible devices are required for safe human interaction, while rigid structures are required to withstand the force application and accuracy in motion. This paper aims at presenting controllable stiffness mechanisms described in the literature for applications with or without shape-locking performances. A classification of the solutions based on their working principle is proposed. The intrinsic properties of these adaptive structures can be modified to change their mechanical characteristics from a geometrical point of view or equivalent elastic properties (with internal mechanisms or with a change in material properties). These solutions are compared quantitatively, based on selected criteria linked to the medical field as the stiffness range, the activation time and the working conditions. Depending on the application and its requirements, the most suitable solution can be selected following the quantitative comparisons. Several applications of these tunable stiffness structures are proposed and illustrated by examples of the literature.

show abstract

“…SMA can be used in vibration attenuation [198], an actuator combined with a spring [48], etc. SMG can be used for soft gripping tools [61,62], smart lenses [63] and smart buttons [64].…”

Section: Other Applicationsmentioning

confidence: 99%

Flexible Medical Devices: Review of Controllable Stiffness Solutions

2017

View full text Add to dashboard Cite

show abstract

“…Hysteretic effect leads to nonlinearity. This property results in high damping capacity [2] which can be utilized for amplitude attenuation in vibrating system [4] so the application of these materials can be extended to control elements too.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation and Chaos in Integer and Fractional Order Two‐Degree‐of‐Freedom Shape Memory Alloy Oscillators

2018

View full text Add to dashboard Cite

A two-degree-of-freedom shape memory oscillator derived using polynomial constitutive model is investigated. Periodic, quasiperiodic, chaotic, and hyperchaotic oscillations are shown by the shape memory alloy based oscillator for selected values of the operating temperatures and excitation parameters. Bifurcation plots are derived to investigate the system behavior with change in parameters. A fractional order model of the shape memory oscillator is presented and dynamical behavior of the system with fractional orders and parameters are investigated.

show abstract

“…Here, the frequency tuning capabilities of a tensegrity inspired structure are explored, using SMA NiTi wires as actuators. SMAs have been widely used to mitigate vibrations, both in passive control systems and adaptive control systems, taking advantage of the superelastic effect, in the former case [34][35][36][37][38], and of the shape-memory effect, in the latter case [39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Design and experimental testing of an adaptive shape-morphing tensegrity structure, with frequency self-tuning capabilities, using shape-memory alloys

Santos

Rodrigues

Micheletti

2015

Smart Mater. Struct.

View full text Add to dashboard Cite

Abstract. The present paper explores the capabilities of a tensegrity-inspired tower with regard to frequency tuning by shape morphing. To change the configuration of the proposed structure, shape-memory-alloy actuators are used. This actuation principle also takes advantage of the variation of the elastic modulus of shape-memory alloys associated with the martensitic transformation. The temperature modulation of the shape-memory-alloy wires is successfully achieved by Joule heating, through a proportional-integral-derivative controller, to change between a low-temperature shape and a high-temperature shape. The implementation of a short-time-Fourier-transform control algorithm allows for the correct identification of the dominant input frequency, associated with the dynamic excitation. This information is used to automatically change the configuration of the structure in order to shift its natural frequency away from that of the dynamic excitation. With this frequency tuning, one obtains a reduction of the accelerations throughout the structure up to about 80%. The good performance of the proposed control approach gives promising indications regarding the use of tensegrity systems, in combination with shape-memory alloys, for shapemorphing applications, and, in particular, for self-tuning structures.

show abstract

Nonlinear dynamics of shape memory alloy oscillators in tuning structural vibration frequencies

Cited by 30 publications

References 78 publications

Flexible Medical Devices: Review of Controllable Stiffness Solutions

Flexible Medical Devices: Review of Controllable Stiffness Solutions

Bifurcation and Chaos in Integer and Fractional Order Two‐Degree‐of‐Freedom Shape Memory Alloy Oscillators

Design and experimental testing of an adaptive shape-morphing tensegrity structure, with frequency self-tuning capabilities, using shape-memory alloys

Contact Info

Product

Resources

About