A study on hysteresis behaviour of SMA linear actuators based on unipolar sigmoid and hyperbolic tangent functions

Kciuk, Marek; Chwastek, Krzysztof; Kluszczyński, K.; Szczygłowski, J.

doi:10.1016/j.sna.2016.02.012

Cited by 27 publications

(12 citation statements)

References 19 publications

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“…Depending either on the simulation of the phenomena associated with the Martensitic transformation or on application-oriented solutions, the proposed approaches most usually focus on the description of material’s hysteretic response when operating under full transformation. Since hysteresis modeling and/or its compensation is crucial in many actuator applications, some researchers have considered the use of various algebraic expressions, such as sigmoid-based curves (Kciuk et al, 2016; Zhang et al, 2013) to accurately predict both major cycles and the formation of first-order PT branches. Another approach for simulating incomplete phase changes is based on the use of differential expressions and Duhem-Madelung models (Mayergoyz, 1991).…”

Section: Adopted Constitutive Equationsmentioning

confidence: 99%

Effect of shape memory alloys partial transformation on the response of morphing structures encompassing shape memory alloy wire actuators

Karakalas

Machairas

Saravanos

2019

Journal of Intelligent Material Systems and Structures

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The present article investigates and explores the effect of partial phase transformation on the response of shape adaptive/morphing structures controlled by shape memory alloy wire actuators subject to variable trajectory and high actuation speed requirements, where the effect of partial transformation becomes more dominant. A modified constitutive model is adopted for the prediction of the thermo-mechanically coupled response on a trailing edge shape adaptive rib prototype intended for active load alleviation in large wind turbine blades, and the simulated behavior is subsequently correlated with experimental results. The experimentally validated model is further used to predict the response of the full-scale camber-line adaptive structure with shape memory alloy Ni51Ti49 wt% actuators in antagonistic configurations, under demanding operational time target trajectories at extreme turbulence conditions. Comparison of the results, with a case that omits partial transformation behavior, reveals substantial improvements in the predicted target trajectories, actuation speed, actuator stresses, and required operational temperature variation. The latter discloses the enhanced potential of shape memory alloy actuators to provide higher transformation rate and possibly higher fatigue life combined with lower energy demands toward the design and realization of efficient morphing structures.

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Section: Adopted Constitutive Equationsmentioning

confidence: 99%

Effect of shape memory alloys partial transformation on the response of morphing structures encompassing shape memory alloy wire actuators

Karakalas

Machairas

Saravanos

2019

Journal of Intelligent Material Systems and Structures

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“…In our proposed model called modified RDPI (MRDPI) model, hyperbolic tangent functions are used as envelope functions that can characterize the excitation frequency effects, in addition to asymmetry and saturation in SMA hysteresis behavior. 28 In fact, we combined the positive features of the GPI and RDPI models to resolve their individual drawbacks. According to the hysteresis characteristics of SMAs, hyperbolic tangent functions are a suitable candidate to describe asymmetry and saturation features.…”

Section: Modelingmentioning

confidence: 99%

Modeling and characterization of the shape memory alloy–based morphing wing behavior using proposed rate-dependent Prandtl-Ishlinskii models

Shakiba

Yousefi‐Koma

Jokar

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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Unique features of shape memory alloys make them a proper actuation choice in various control systems. However, their nonlinear hysteresis behavior negatively affects wide utilization of such materials in structure actuation. In this study, the frequency effect on the hysteresis behavior of a shape memory alloy–actuated structure is experimentally investigated, and also two proposed versions of rate-dependent Prandtl-Ishlinskii (modified rate-dependent Prandtl-Ishlinskii and revised modified rate-dependent Prandtl-Ishlinskii) are presented, which are capable of characterizing this phenomenon. Experimental results show that increasing excitation frequency leads to bigger hysteresis loops. It is also proven that rate-dependency cannot be predicted by generalized Prandtl-Ishlinskii model. In addition, a comparison between the dead zone function-based rate-dependent Prandtl-Ishlinskii model as an only benchmark model and the proposed models have been done that proves the proposed models’ superiority. In addition, genetic algorithm is exploited to identify unknown parameters of all models. Trained models performance is also experimentally evaluated at different input frequencies. Comparison between simulation and experimental results indicates that the proposed models can reliably predict saturated, asymmetric, rate-dependent hysteresis behavior, and minor loops in shape memory alloy–embedded actuators.

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“… The mathematical model for the stroketemperature hysteresis of a SMA spring The analysis, design and optimization of the SMA spring are significantly dependent on the knowledge of the thermal hysteresis loop. There are many approaches to develop a mathematical model describing the thermo-mechanical hysteresis [7,8,9,10]. In the paper we focus on the model adapted from the limiting loop proximity (L2P) hysteresis.…”

Section: Sma Spring Actuator Designmentioning

confidence: 99%

A computational and experimental study of shape memory alloy spring actuator

Stachowiak¹

2019

ELECTROTECHNICAL REVIEW

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The paper presents the combined experimental and computational study of the shape memory alloy (SMA) spring actuator. The design strategy for a system composed of two springs: a SMA spring and a steel spring has been presented. The force versus stroke characteristics of designed system at high and low temperature condition have been calculated and measured. The electro-thermo-mechanical characterization of SMA spring has been carried out. The selected results of calculation and laboratory tests of the designed spring system have been given. Streszczenie. W pracy przedstawiono wyniki obliczeń i badań eksperymentalnych siłownika sprężynowego wykonanego ze stopu z pamięcią kształtu. Omówiono zaproponowaną strategię projektowania systemu składającego się z dwóch sprężyn: sprężyny SMA i sprężyny stalowej. Wyznaczono i zmierzono charakterystykę siły w funkcji przesunięcia dla stanu wysoko i niskotemperaturowego. Zaprojektowano specjalne stanowisko pomiarowe do badań elektro-cieplno-mechanicznych sprężyny SMA i układu złożonego ze sprężyny SMA i sprężyny stalowej. Przedstawiono wybrane wyniki obliczeń i badań laboratoryjnych zaprojektowanego układu sprężyn (Modelowanie i eksperymentalne badania siłownika sprężynowego wykonanego ze stopu z pamięcią kształtu).

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A study on hysteresis behaviour of SMA linear actuators based on unipolar sigmoid and hyperbolic tangent functions

Cited by 27 publications

References 19 publications

Effect of shape memory alloys partial transformation on the response of morphing structures encompassing shape memory alloy wire actuators

Effect of shape memory alloys partial transformation on the response of morphing structures encompassing shape memory alloy wire actuators

Modeling and characterization of the shape memory alloy–based morphing wing behavior using proposed rate-dependent Prandtl-Ishlinskii models

A computational and experimental study of shape memory alloy spring actuator

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