Hysteresis Behaviour and Modeling of SMA Actuators

Luo, Haojun; Liao, Yanjian; Abel, E.W.; Wang, Zhigang; Liu, Xia

doi:10.5772/9982

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…The nickel-titanium alloy wires are placed on the splint in a square shape shown in Figure 1. Note that we have used three diameters of the alloy wires in order to raise the temperature range affecting the form of the wire when the transformation process occurs [32]. The wiring between the sensor and the circuit board is hidden in grooves.…”

Section: Design Of the Proposed Splintmentioning

confidence: 99%

Design of an orthopedic smart splint using nickel-titanium shape memory alloy

Alhialy

Alkhaled²,

Al-Sultan³

et al. 2023

IJEECS

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<span lang="EN-US">People with broken bones suffer from symptoms of muscular atrophy as a result of a lack of movement, so it was necessary to find effective solutions due to the relative pain they cause and the difficulty of movement after healing. In this paper, we proposed a smart splint made of nickel-titanium shape memory alloys (SMA) wires. These alloys have unique properties compared to other materials, the most important of which is maintaining the original shape during manufacturing at a certain temperature. Temperature, pressure, as well as humidity, were analyzed and monitored while the patient wore the splint to reach the best possible results by using a microcontroller. The results showed that there was a significant improvement for the muscles in a short time when using the proposed splint, as the percentage of qualified muscle recovery increased by more than 70% when using the usual splint. The wires used had an effective role in rehabilitating these muscles by performing a permanent local massage. due to the different diameters of these wires, a different response to temperature change was recorded.</span>

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Section: Design Of the Proposed Splintmentioning

confidence: 99%

Design of an orthopedic smart splint using nickel-titanium shape memory alloy

Alhialy

Alkhaled²,

Al-Sultan³

et al. 2023

IJEECS

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“…The operating frequencies of these actuators are dependent upon the rate of cooling and heating of SMA to promote phase change. Conversely, exhibiting energy loss during phase transformation can cause a hysteretic behavior to the SMA including nonlinear actuation, parameter uncertainties and their relative costs restrict their use in commercial applications [84].…”

Section: Fabrication and Propertiesmentioning

confidence: 99%

Actuator Materials: Review on Recent Advances and Future Outlook for Smart Textiles

Kongahage

Foroughi

2019

Fibers

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Smart textiles based on actuator materials are of practical interest, but few types have been commercially exploited. The challenge for researchers has been to bring the concept out of the laboratory by working out how to build these smart materials on an industrial scale and permanently incorporate them into textiles. Smart textiles are considered as the next frontline for electronics. Recent developments in advance technologies have led to the appearance of wearable electronics by fabricating, miniaturizing and embedding flexible conductive materials into textiles. The combination of textiles and smart materials have contributed to the development of new capabilities in fabrics with the potential to change how athletes, patients, soldiers, first responders, and everyday consumers interact with their clothes and other textile products. Actuating textiles in particular, have the potential to provide a breakthrough to the area of smart textiles in many ways. The incorporation of actuating materials in to textiles is a striking approach as a small change in material anisotropy properties can be converted into significant performance enhancements, due to the densely interconnected structures. Herein, the most recent advances in smart materials based on actuating textiles are reviewed. The use of novel emerging twisted synthetic yarns, conducting polymers, hybrid carbon nanotube and spandex yarn actuators, as well as most of the cutting–edge polymeric actuators which are deployed as smart textiles are discussed.

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“…The modified KP operator is shown in Figure 2; different from the traditional KP operator, the improved KP operator has the output range [0, +1], which is because the output of MSMA actuator is unidirectional [16]. …”

Section: Structure Of the Hysteresis Model Of Msma Actuator Based mentioning

confidence: 99%

Hysteresis Modeling of Magnetic Shape Memory Alloy Actuator Based on Krasnosel′skii‐Pokrovskii Model

Zhou

Wang²,

Gao³

2013

The Scientific World Journal

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As a new type of intelligent material, magnetically shape memory alloy (MSMA) has a good performance in its applications in the actuator manufacturing. Compared with traditional actuators, MSMA actuator has the advantages as fast response and large deformation; however, the hysteresis nonlinearity of the MSMA actuator restricts its further improving of control precision. In this paper, an improved Krasnosel'skii-Pokrovskii (KP) model is used to establish the hysteresis model of MSMA actuator. To identify the weighting parameters of the KP operators, an improved gradient correction algorithm and a variable step-size recursive least square estimation algorithm are proposed in this paper. In order to demonstrate the validity of the proposed modeling approach, simulation experiments are performed, simulations with improved gradient correction algorithm and variable step-size recursive least square estimation algorithm are studied, respectively. Simulation results of both identification algorithms demonstrate that the proposed modeling approach in this paper can establish an effective and accurate hysteresis model for MSMA actuator, and it provides a foundation for improving the control precision of MSMA actuator.

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Hysteresis Behaviour and Modeling of SMA Actuators

Cited by 7 publications

References 8 publications

Design of an orthopedic smart splint using nickel-titanium shape memory alloy

Design of an orthopedic smart splint using nickel-titanium shape memory alloy

Actuator Materials: Review on Recent Advances and Future Outlook for Smart Textiles

Hysteresis Modeling of Magnetic Shape Memory Alloy Actuator Based on Krasnosel′skii‐Pokrovskii Model

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