Shape Memory Alloy Actuators for Upper-Limb Prosthetic Applications: A Review

Authors

  • Zheng Deng Institute of Intelligent Rehabilitation Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Engineering Research Center of Assistive Devices, Shanghai, 200093, China; Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China Author
  • Tian Yang Institute of Intelligent Rehabilitation Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Engineering Research Center of Assistive Devices, Shanghai, 200093, China; Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China Author
  • Hongliu Yu Institute of Intelligent Rehabilitation Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Engineering Research Center of Assistive Devices, Shanghai, 200093, China; Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China Author
  • Qiaoling Meng Institute of Intelligent Rehabilitation Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Engineering Research Center of Assistive Devices, Shanghai, 200093, China; Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China Author

DOI:

https://doi.org/10.64229/zwykwd57

Keywords:

Shape memory alloy, Nickel-titanium, Prosthetic hand, Artificial muscle, Upper-limb prosthesis

Abstract

Nickel-titanium (NiTi) shape memory alloy (SMA) actuators have attracted considerable interest in upper-limb prosthetic design because they can produce useful motion within compact and quiet mechanisms. However, results obtained from isolated SMA wires or springs do not always represent their performance in a complete prosthetic system, where cooling, packaging, control hardware, and user safety must also be considered. This review examines thermally activated SMA actuators used in upper-limb prostheses and related wearable devices. Applications of superelastic NiTi are considered separately when the material functions as a passive structural component rather than a heat-activated actuator. The reviewed systems are organized according to actuator configuration and application, including straight wires, coiled springs, antagonistic arrangements, and hybrid designs. The available evidence shows that slow cooling, thermal hysteresis, fatigue, sensing drift, and surface-temperature limits continue to restrict repeated or sustained operation. Thermally activated SMA is therefore better suited to intermittent and space-constrained functions, such as individual finger motion, occasional wrist positioning, and compact locking or release mechanisms. Motor-driven systems generally remain more appropriate for rapid and repetitive grasping. Hybrid systems may provide a practical alternative by assigning frequent motion to motors and reserving SMA for functions in which compact size, quiet operation, or local compliance provides a clear system-level advantage.

References

[1]Segura D, Romero E, Abarca VE, Elias DA. Upper limb prostheses by the level of amputation: A systematic review. Prosthesis, 2024, 6(2), 277-300. DOI: 10.3390/prosthesis6020022

[2]Belter JT, Segil JL, Dollar AM, Weir RF. Mechanical design and performance specifications of anthropomorphic prosthetic hands: A review. Journal of Rehabilitation Research and Development, 2013, 50(5), 599-618. DOI: 10.1682/JRRD.2011.10.0188

[3]Kim M, Heo J, Rodrigue H, Lee HT, Pané S, Han, MW, et al. Shape memory alloy (SMA) actuators: The role of material, form, and scaling effects. Advanced Materials, 2023, 35, 2208517. DOI: 10.1002/adma.202208517

[4]Hamid QY, Hasan WZW, Hanim MAA, Nuraini A, Hamidon M, Ramli H. Shape memory alloys actuated upper limb devices: A review. Sensors and Actuators Reports, 2023, 5, 100160. DOI: 10.1016/j.snr.2023.100160

[5]Mohd Jani J, Leary M, Subic A, Gibson MA. A review of shape memory alloy research, applications and opportunities. Materials & Design (1980-2015), 2014, 56, 1078-1113. DOI: 10.1016/j.matdes.2013.11.084

[6]Frost M, Sedlák P, Sippola M, Šittner P. Thermomechanical model for NiTi shape memory wires. Smart Materials and Structures, 2010, 19(9), 094010. DOI: 10.1088/0964-1726/19/9/094010

[7]Dauksher R, Patterson Z, Majidi C. Characterization and analysis of a flexural shape memory alloy actuator. Actuators, 2021, 10(8), 202. DOI: 10.3390/act10080202

[8]Britz R, Motzki P. Analysis and evaluation of bundled SMA actuator wires. Sensors and Actuators A: Physical, 2021, 333, 113233. DOI: 10.1016/j.sna.2021.113233

[9]Kumar R, Dwivedi A, Bhattacharya B. Experimental analysis of cooling time reduction in SMA actuator through tuning of wire geometry and heat transfer process. Smart Materials and Structures, 2026, 35, 025009. DOI: 10.1088/1361-665x/ae3502

[10]Laurentis KJD, Mavroidis C. Mechanical design of a shape memory alloy actuated prosthetic hand. Technology and Health Care, 2002, 10(2), 91-106. DOI: 10.3233/thc-2002-10202

[11]Chee Siong Loh, Yokoi H, Arai T. New shape memory alloy actuator: Design and application in the prosthetic hand. 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005, 6900-6903. DOI: 10.1109/iembs.2005.1616092

[12]Andrianesis K, Tzes A. Design of an anthropomorphic prosthetic hand driven by shape memory alloy actuators. 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008, 517-522. DOI: 10.1109/biorob.2008.4762907

[13]Andrianesis K, Tzes A. Development and control of a multifunctional prosthetic hand with shape memory alloy actuators. Journal of Intelligent & Robotic Systems, 2014, 78(2), 257-289. DOI: 10.1007/s10846-014-0061-6

[14]Deng E, Tadesse Y. A soft 3d-printed robotic hand actuated by coiled SMA. Actuators, 2020, 10(1), 6. DOI: 10.3390/act10010006

[15]Pan J, Yu J, Pei X. A novel shape memory alloy actuated soft gripper imitated hand behavior. Frontiers of Mechanical Engineering, 2022, 17, 44. DOI: 10.1007/s11465-022-0700-8

[16]Sun L, Lan Y, Wang B. Anthropomorphic modular gripper finger actuated by antagonistic wire and shape-memory alloy (SMA) springs. Mechanical Sciences, 2024, 15(2), 601-611. DOI: 10.5194/ms-15-601-2024

[17]Gao F, Deng H, Zhang Y. Hybrid actuator combining shape memory alloy with DC motor for prosthetic fingers. Sensors and Actuators A: Physical, 2015, 223, 40-48. DOI: 10.1016/j.sna.2014.11.025

[18]Rodrigue H, Wei W, Bhandari B, Ahn SH. Fabrication of wrist-like sma-based actuator by double smart soft composite casting. Smart Materials and Structures, 2015, 24(12), 125003. DOI: 10.1088/0964-1726/24/12/125003

[19]Nishimura T, Akasaka K, Ueno K, Suzuki Y, Tsuji T, Watanabe T. Lightweight and high-payload robotic gripper using shape-memory-alloy actuator and self-locking mechanism. IEEE Access, 2025, 13, 120056-120068. DOI: 10.1109/access.2025.3587215

[20]Lee J, Han J, Kim D, Jeong S. RIM hand: A robotic hand with an accurate carpometacarpal joint and nitinol-supported skeletal structure. Soft Robotics, 2026, 13(3), 467-481. DOI: 10.1177/21695172261423503

[21]Soriano-Heras E, Blaya-Haro F, Molino C, de Agustín del Burgo JM. Rapid prototyping prosthetic hand acting by a low-cost shape-memory-alloy actuator. Journal of Artificial Organs, 2018, 21(2), 238-246. DOI: 10.1007/s10047-017-1014-1

[22]Baek H, Khan, AM, Bijalwan V, Jeon S, Kim Y. Dexterous robotic hand based on rotational shape memory alloy actuator-joints. IEEE Transactions on Medical Robotics and Bionics, 2023, 5(4), 1082-1092. DOI: 10.1109/tmrb.2023.3315783

[23]Yang H, Tao Z, Yang JW, Zhang H, Xu M, Wu M, et al. A lightweight prosthetic hand with 19-DOF dexterity and human-level functions. Nature Communications, 2025, 16, 955. DOI: 10.1038/s41467-025-56352-5

[24]Simone F, Rizzello G, Seelecke S, Motzki P. A soft five-fingered hand actuated by shape memory alloy wires: Design, manufacturing, and evaluation. Frontiers in Robotics and AI, 2020, 7, 608841. DOI: 10.3389/frobt.2020.608841

[25]Curcio E, Carbone G. A design procedure for a novel concept of shape-memory-alloy-actuated finger exoskeleton. Robotic Automation Systems, 2025, 187, 104919. DOI: 10.1016/j.robot.2025.104919

[26]Bishay P, Fontana J, Raquipiso B, Rodriguez J, Borreta MJ, Enos B, Gay T, et al. Development of a biomimetic transradial prosthetic arm with shape memory alloy muscle wires. Engineering Research Express, 2020, 2, 035041. DOI: 10.1088/2631-8695/abb710

[27]Hope J, McDaid A. Development of wearable wrist and forearm exoskeleton with shape memory alloy actuators. Journal of Intelligent & Robotic Systems, 2017, 86(3-4), 397-417. DOI: 10.1007/s10846-016-0456-7

[28]Hadi A, Alipour K, Kazeminasab S, Elahinia M. ASR glove: A wearable glove for hand assistance and rehabilitation using shape memory alloys. Journal of Intelligent Material Systems and Structures, 2017, 29(8), 1575-1585. DOI: 10.1177/1045389x17742729

[29]Jeong J, Yasir IB, Han J, Park CH, Bok SK, Kyung KU. Design of shape memory alloy-based soft wearable robot for assisting wrist motion. Applied Sciences, 2019, 9(19), 4025. DOI: 10.3390/app9194025

[30]Curcio EM, Lago F, Carbone G. Design models and performance analysis for a novel shape memory alloy-actuated wearable hand exoskeleton for rehabilitation. IEEE Robotics and Automation Letters, 2024, 9(10), 8905-8912. DOI: 10.1109/lra.2024.3455901

[31]Lee SM, Park J. A soft wearable exoglove for rehabilitation assistance: A novel application of knitted shape-memory alloy as a flexible actuator. Fashion and Textiles, 2024, 11, 14. DOI: 10.1186/s40691-024-00377-9

[32]Jeong,J, Cho M, Kyung KU. Soft artificial muscle based on pre-detwinned shape memory alloy spring actuator achieving high passive assistive torque for wearable robot. Soft Robotics, 2024, 11(5), 835-844. DOI: 10.1089/soro.2023.0154

[33]Shin D, Kim K, Yang SY, Park JH, Gong YJ, Choi HR. Woven fabric muscle for soft wearable robotic application using two-dimensional zigzag shape memory alloy actuator. Soft Robotics, 2024, 11(6), 1008-1019. DOI: 10.1089/soro.2023.0171

[34]Jeong J, Hyeon K, Jang SY, Chung C, Hussain S, Ahn SY, et al. Soft wearable robot with shape memory alloy (SMA)-based artificial muscle for assisting with elbow flexion and forearm supination/pronation. IEEE Robotics and Automation Letters, 2022, 7(3), 6028-6035. DOI: 10.1109/lra.2022.3161700

[35]Taylor F, Au C. Forced air cooling of shape-memory alloy actuators for a prosthetic hand. Journal of Computing and Information Science in Engineering, 2016, 16(4), 041004. DOI: 10.1115/1.4033233

[36]Karakoç O, Hayrettin C, Bass M. Wang S, Canadinc D, Mabe J, et al. Effects of upper cycle temperature on the actuation fatigue response of NiTiHf high temperature shape memory alloys. Acta Materialia, 2017, 138, 185-197. DOI: 10.1016/j.actamat.2017.07.035

[37]Dutta SM, Ghorbel FH. Differential hysteresis modeling of a shape memory alloy wire actuator. IEEE/ASME Transactions on Mechatronics, 2005, 10(2), 189-197. DOI: 10.1109/tmech.2005.844709

[38]Moallem M, Tabrizi VA. Tracking control of an antagonistic shape memory alloy actuator pair. IEEE Transactions on Control Systems Technology, 2009, 17(1), 184-190. DOI: 10.1109/tcst.2008.922506

[39]Ko J, Jun MB, Gilardi G, Haslam E, Park EJ. Fuzzy PWM-PID control of cocontracting antagonistic shape memory alloy muscle pairs in an artificial finger. Mechatronics, 2011, 21(7), 1190-1202. DOI: 10.1016/j.mechatronics.2011.07.003

[40]Wang TM, Shi ZY, Liu D, Ma C, Zhang ZH. An accurately controlled antagonistic shape memory alloy actuator with self-sensing. Sensors, 2012, 12(6), 7682-7700. DOI: 10.3390/s120607682

[41]Zakerzadeh MR, Sayyaadi H. Precise position control of shape memory alloy actuator using inverse hysteresis model and model reference adaptive control system. Mechatronics, 2013, 23(8), 1150-1162. DOI: 10.1016/j.mechatronics.2013.10.001

[42]Gurung H, Banerjee A. Self-sensing shape memory alloy wire actuator based on unscented kalman filter. Sensors and Actuators A: Physical, 2016, 251, 258-265. DOI: 10.1016/j.sna.2016.09.037

[43]Gurung H, Banerjee A. Development of an extended kalman filter for the self-sensing application of a spring-biased shape memory alloy wire actuator. Smart Materials and Structures, 2016, 25(2), 025012. DOI: 10.1088/0964-1726/25/2/025012

[44]Lee SH, Kim SW. Improved position control of shape memory alloy actuator using the self-sensing model. Sensors and Actuators A: Physical, 2019, 297, 111529. DOI: 10.1016/j.sna.2019.111529

[45]Mohan S, Banerjee A. Modelling of minor hysteresis loop of shape memory alloy wire actuator and its application in self-sensing. Smart Materials and Structures, 2021, 30(5), 055011. DOI: 10.1088/1361-665x/abeefa

[46]Bhargaw HN, Singh S, Botre BA, Sinha P. Differential resistance based self-sensing recurrent neural network model for position estimation and control of antagonistic shape memory alloy actuator. Engineering Research Express, 2021, 3(4), 045018. DOI: 10.1088/2631-8695/ac310d

[47]Mohan S, Banerjee A. Particle filter based self sensing shape memory alloy wire actuator under external cooling. Mechanical Systems and Signal Processing, 2023, 185, 109779. DOI: 10.1016/j.ymssp.2022.109779

[48]Kennedy S, Shougat MREU, Perkins E. Robust self-sensing shape memory alloy actuator using a machine learning approach. Sensors and Actuators A: Physical, 2023, 354, 114255. DOI: 10.1016/j.sna.2023.114255

[49]Wang Z, Shang Z, Hu C, Zhu Y. A highly integrated shape memory alloy actuator and precision self-sensing tracking control based on position compensation. Sensors and Actuators A: Physical, 2024, 370, 115250. DOI: 10.1016/j.sna.2024.115250

[50]Mohan S, Banerjee A. Lstm-based self-sensing application of shape memory alloy wire actuators under practical loading conditions. Shape Memory and Superelasticity, 2024, 10(4), 407-421. DOI: 10.1007/s40830-024-00506-9

[51]Shougat MREU, Kennedy S, Perkins E. A self-sensing shape memory alloy actuator physical reservoir computer. IEEE Sensors Letters, 2023, 7(5), 1-4. DOI: 10.1109/lsens.2023.3270704

[52]Saikrishna CN, Ramaiah KV, Paul D, Bhaumik SK. Enhancement in fatigue life of NiTi shape memory alloy thermal actuator wire. Acta Materialia, 2016, 102, 385-396. DOI: 10.1016/j.actamat.2015.09.034

[53]Zohra MB, Er-Remyly O, Riad A, Alhamany A. Finite element analysis for fatigue phenomena in mechatronic shape memory alloy actuator. Scientific African, 2023, 20, e01601. DOI: 10.1016/j.sciaf.2023.e01601

[54]Britz R, Rizzello G, Motzki P. High‐speed antagonistic shape memory actuator for high ambient temperatures. Advanced Engineering Materials, 2022, 24(9), 2200205. DOI: 10.1002/adem.202200205

[55]Zhang Q, Xu L, Chen H, Li Z, Huang L, Yi S. Research on a novel shape-memory alloy artificial muscle with active and passive heat dissipation. Actuators, 2025, 14(5), 248. DOI: 10.3390/act14050248

[56]Villoslada A, Flores A, Copaci D, Blanco D, Moreno L. High-displacement flexible shape memory alloy actuator for soft wearable robots. Robotics and Autonomous Systems, 2015, 73, 91-101. DOI: 10.1016/j.robot.2014.09.026

[57]Li J, Sun M, Wu Z, Yin H. Design, analysis, and grasping experiments of a novel soft hand: Hybrid actuator using shape memory alloy actuators, motors, and electromagnets. Soft Robotics, 2020, 7(3), 396-407. DOI: 10.1089/soro.2018.0123

[58]Lee KS, Kim Y, Park HS. Shape memory alloy-based reactive tubular (SMART) brake for compact and energy-efficient wearable robot design. ACS Applied Materials & Interfaces, 2024, 16(7), 8974-8983. DOI: 10.1021/acsami.3c15179

[59]Liang C, Rogers CA. One-dimensional thermomechanical constitutive relations for shape memory materials. Journal of Intelligent Material Systems and Structures, 1990, 1(2), 207-234. DOI: 10.1177/1045389X9000100205

[60]Brinson LC. One-dimensional constitutive behavior of shape memory alloys: Thermomechanical derivation with non-constant material functions and redefined martensite internal variable. Journal of Intelligent Material Systems and Structures, 1993, 4(2), 229-242. DOI: 10.1177/1045389X9300400213

[61]Hughes D, Wen JT. Preisach modeling of piezoceramic and shape memory alloy hysteresis. Smart Materials and Structures, 1997, 6(3), 287-300. DOI: 10.1088/0964-1726/6/3/007

[62]Feng Y, Rabbath CA, Su CY. Inverse Duhem model based robust adaptive control for flap positioning system with SMA actuators. IFAC Proceedings Volumes, 2011, 44(1), 8126-8131. DOI: 10.3182/20110828-6-IT-1002.01744

[63]Jayender J, Patel RV, Nikumb S, Ostojic M. Modeling and control of shape memory alloy actuators. IEEE Transactions on Control Systems Technology, 2008, 16(2), 279-287. DOI: 10.1109/TCST.2007.903391

[64]Elahinia MH, Ashrafiuon H. Nonlinear control of a shape memory alloy actuated manipulator. Journal of Vibration and Acoustics, 2002, 124(4), 566-575. DOI: 10.1115/1.1501285

[65]Shahir MM, Mirzaei M, Farbodi M, Rafatnia S. Estimation of shape memory alloy actuator dynamics to design reduced-order position controller with input saturation. IET Control Theory & Applications, 2024, 18(10), 1301-1313. DOI: 10.1049/cth2.12665

[66]Shahir MM, Mirzaei M, Farbodi M, Rafatnia S. Extended state observer-based feedback linearization control of shape memory alloy actuator: Design and experiment. International Journal of Dynamics and Control, 2024, 12(7), 2447-2458. DOI: 10.1007/s40435-023-01362-8

[67]Mirzaei M, Rafatnia S, Shahir M M, Jamshidi S, Farbodi M. Observer-based fault tolerant control of shape memory alloy actuator. Scientific Reports, 2025, 15, 39455. DOI: 10.1038/s41598-025-22981-5

[68]Gilday K, Hughes J, Iida F. Sensing, actuating, and interacting through passive body dynamics: A framework for soft robotic hand design. Soft Robotics, 2023, 10(1), 159-173. DOI: 10.1089/soro.2021.0077

[69]Zhagiparova A, Golubev V, Kim D. Recent developments in pneumatic artificial muscle actuators. Actuators, 2025, 14(12), 582. DOI: 10.3390/act14120582

[70]Vanderborght B, Albu-Schäffer A, Bicchi A, Burdet E, Caldwell DG, Carloni R, et al. Variable impedance actuators: A review. Robotics and Autonomous Systems, 2013, 61(12), 1601-1614. DOI: 10.1016/j.robot.2013.06.009

[71]Polygerinos P, Wang Z, Galloway KC, Wood RJ, Walsh CJ. Soft robotic glove for combined assistance and at-home rehabilitation. Robotics and Autonomous Systems, 2015, 73, 135-143. DOI: 10.1016/j.robot.2014.08.014

[72]Marconi D, Baldoni A, McKinney Z, Cempini M, Crea S, Vitiello N. A novel hand exoskeleton with series elastic actuation for modulated torque transfer. Mechatronics, 2019, 61, 69-82. DOI: 10.1016/j.mechatronics.2019.06.001

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2026-08-20

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Vol. 2 No. 1 (2026)

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Copyright (c) 2026 Zheng Deng, Tian Yang, Hongliu Yu, Qiaoling Meng (Author)

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How to Cite

Deng, Z., Yang, T., Yu, H., & Meng, Q. (2026). Shape Memory Alloy Actuators for Upper-Limb Prosthetic Applications: A Review. Smart Materials and Engineering Applications, 2(1), 1-14. https://doi.org/10.64229/zwykwd57