Artificial muscle is one of the more prominent topics in modern robotics as it can be applied to robotic arms, electric vehicles and wearable robots (Shahinpoor et al. in Smart Mater Struct 7:15–30, 1998; Jani et al. in Mater Des 56:1078–1113, 2014). The advantages of Shape Memory Alloy (SMA) artificial muscle are lightness and high energy density. The high energy density allows the actuator to make powerful motions. Meanwhile, SMA wire contracts 6% of its length, which means that the required displacement cannot be achieved by a simple connection. To resolve these disadvantages, the SMA wires are coiled in a diamond-shaped structure. If the electric current is given by contracting wires in the longitudinal direction, the actuator can exert force and displacement in the diagonal direction. As the crossed tendon finds its minimal length when actuated, the rotation angle converges to 90°. Parameters related with the rotating motion were selected, such as SMA wires’ diameter and length, distance between the crossed part and elbow part, size of the diamond-shaped structure, friction, etc. To determine the maximum force of the actuator, a graphical method was used, which is similar to the yield strength determination (0.2% offset). Because the robotic elbow joint is connected by the tendon, the connections between links are flexible, and without motor it does not generate any sound or noise during operation. The robotic elbow joint using the SMA actuator is designed and analyzed, which can rotate 86.7° and generates maximum 56.3 N force.
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Shahinpoor, M., Bar-Cohen, Y., Simpson, J. O., & Smith, J. (1998). Ionic polymer-metal composites (IPMCs) as biomimetic sensors, actuators and artificial muscles: a review. Smart Materials and Structures,7, 15–30.
Hunter, I. W., & Lafontaine, S. (1992). A comparison of muscle with artificial actuators. In: IEEE, solid-state sensor and actuator workshop 5th technical digest.
Chu, W. S., et al. (2012). Review of biomimetic underwater robots using smart actuators. International Journal of Precision Engineering and Manufacturing,13, 1281–1292.
Binayak Bhandari, Gil-Yong Lee, Sung-Hoon Ahn, (2012) A review on IPMC material as actuators and sensors: Fabrications, characteristics and applications. International Journal of Precision Engineering and Manufacturing 13(1):141–163
Brinson, L. C., & Huang, M. S. (1996). Simplification and comparisons of shape memory alloy constitutive models. Journal of Intelligent Material Systems and Structures,7, 108–114.
Elahinia, M. H., & Ahmadian, M. (2005). An enhanced SMA phenomenological model: The shortcomings of the existing models. Smart Materials and Structures,14, 1297–1308.
Elahinia, M. H., & Ahmadian, M. (2005). An enhanced SMA phenomenological model: The experimental study. Smart Materials and Structures,14, 1309–1319.
Brinson, L. C. (1993). 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,4, 229–242.
Lagoudas, L., Hartl, D., Chemisky, Y., Machado, L., & Popov, P. (2012). Constitutive model for the numerical analysis of phase transformation in polycrstalline shape memory alloys. International Journal of Plasticity,32–33, 155–183.
Rodrigue, H., et al. (2014). Cross-shaped twisting structure using SMA-based smart soft composite. International Journal of Precision Engineering and Manufacturing-Green Technology,1, 153–156.
Kim, H. I., Han, M. W., Song, S. H., & Ahn, S. H. (2016). Soft morphing hand driven by SMA tendon wire. Composites Part B Engineering,105, 138–148.
Rodrigue, H., Wang, W., Bhandari, B., Han, M. W., & Ahn, S. H. (2015). SMA-based smart soft composite structure capable of multiple modes of actuation. Composites Part B Engineering,82, 152–158.
Wang, W., Rodrigue, H., et al. (2016). Soft composite hinge actuator and application to compliant robot gripper. Composites Part B Engineering,98, 397–405.
Song, S. H., Lee, H., Lee, J. G., Lee, J. Y., Cho, M., & Ahn, S. H. (2016). Design and analysis of a smart soft composite structure for various modes of actuation. Composites Part B Engineering,95, 155–165.
Tanaka, K., Kobayashi, S., & Sato, Y. (1986). Thermomechanics of transformation pseudoelasticity and shape memory effect in alloys. International Journal of Plasticity,2, 59–72.
Porter, D. A., & Easterling, K. E. (1992). Phase transformations in metals and alloys, 2 edn, pp. 1–57.
Mincheol Kim, Yong-Jun Shin, Jang-Yeob Lee, Won-Shik Chu, Sung-Hoon Ahn, (2017) Pulse width modulation as energy-saving strategy of shape memory alloy based smart soft composite actuator. International Journal of Precision Engineering and Manufacturing 18(6):895–901
Kamita, T., & Matsuzaki, Y. (1998). One-dimensional pseudoelastic theory of shape memory alloys. Smart Materials and Structures,7, 489–495.
DYNALLOY. Inc. (2018). Flexinol actuator wire technical and design data. Technical Info.
This research was supported by a grant to Bio-Mimetic Robot Research Center Funded by Defense Acquisition Program Administration, and by Agency for Defense Development (UD190018ID), the National Research Foundation of Korea (NRF) funded by the MSIT (NRF-2018R1A2A1A13078704), the Basic Research Lab Program through the National Research Foundation of Korea (NRF) funded by the MSIT (2018R1A4A1059976), and Institute of Engineering Research, Seoul National University.
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Park, HB., Kim, DR., Kim, HJ. et al. Design and Analysis of Artificial Muscle Robotic Elbow Joint Using Shape Memory Alloy Actuator. Int. J. Precis. Eng. Manuf. 21, 249–256 (2020). https://doi.org/10.1007/s12541-019-00240-8
- Shape memory alloy
- Robotic elbow joint