Design and Analysis of a 2-DOF Actuator with Variable Stiffness Based on Leaf Springs
Source abstract
Abstract
Abstract Variable Stiffness Actuator (VSA) is the core mechanism to achieve physical human–robot interaction, which is an inevitable development trend in robotic. The existing variable stiffness actuators are basically single degree-of-freedom (DOF) rotating joints, which are achieving multi-DOF motion by cascades and resulting in complex robot body structures. In this paper, an integrated 2-DOF actuator with variable stiffness is proposed, which could be used for bionic wrist joints or shoulder joints. The 2-DOF motion is coupling in one universal joint, which is different from the way of single DOF actuators cascade. Based on the 2-DOF orthogonal motion generated by the spherical wrist parallel mechanism, the stiffness could be adjusted by varying the effective length of the springs, which is uniformly distributed in the variable stiffness unit. The variable stiffness principle, the model design, and theoretical analysis of the VSA are discussed in this work. The independence of adjusting the equilibrium position and stiffness of the actuator is validated by experiments. The results show that the measured actuator characteristics are sufficiently matched the theoretical values. In the future, VSA could be used in biped robot or robotic arm, ensuring the safety of human–robot interaction.
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Research context
OpenAlex topics: Prosthetics and Rehabilitation Robotics · Muscle activation and electromyography studies · Soft Robotics and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
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1. Ham, R. V., Sugar, T., Vanderborght, B., Hollander, K., & Lefeber, D. (2009). Compliant actuator designs. IEEE Robotics & Automation Magazine, 3(16), 81–94.10.1109/MRA.2009.933629 ↗
2. Tagliamonte, N. L., Sergi, F., Accoto, D., Carpino, G., & Guglielmelli, E. (2012). Double actuation architectures for rendering variable impedance in compliant robots: A review. Mechatronics, 22(8), 1187–1203.10.1016/j.mechatronics.2012.09.011 ↗
3. Villegas, D., Van Damme, M., Vanderborght, B., Beyl, P., & Lefeber, D. (2012). Third-generation pleated pneumatic artificial muscles for robotic applications: Development and comparison with McKibben muscle. Advanced Robotics, 26(11–12), 1205–1227.10.1080/01691864.2012.689722 ↗
4. Kong, K., Bae, J., & Tomizuka, M. (2009). Control of rotary series elastic actuator for ideal force-mode actuation in human–robot interaction applications. IEEE/ASME Transactions on Mechatronics, 14(1), 105–118.10.1109/TMECH.2008.2004561 ↗
5. Visser, L. C., Carloni, R., & Stramigioli, S. (2011). Energy-efficient variable stiffness actuators. IEEE Transactions on Robotics, 27(5), 865–875.10.1109/TRO.2011.2150430 ↗
6. Hogan, N. (1984). Adaptive control of mechanical impedance by coactivation of antagonist muscles. IEEE Transactions on Automatic Control, 29(8), 681–690.10.1109/TAC.1984.1103644 ↗
7. Ménard, T., Grioli, G., & Bicchi, A. (2014). A stiffness estimator for agonistic–antagonistic variable-stiffness-actuator devices. IEEE Transactions on Robotics, 30(5), 1269–1278.10.1109/TRO.2014.2329998 ↗
8. Liu, Y. W., Liu, X. G., Yuan, Z. Q., & Liu, J. G. (2019). Design and analysis of spring parallel variable stiffness actuator based on antagonistic principle. Mechanism and Machine Theory, 140, 44–58.10.1016/j.mechmachtheory.2019.05.016 ↗
9. Tonietti, G., Schiavi, R., & Bicchi, A. (2005). Design and control of a variable stiffness actuator for safe and fast physical human/robot interaction. In IEEE international conference on robotics and automation, Barcelona, Spain (pp. 526–531)10.1109/ROBOT.2005.1570172 ↗
10. Schiavi, R., Grioli, G., Sen, S., & Bicchi, A. (2008). VSA-II: A novel prototype of variable stiffness actuator for safe and performing robots interacting with humans. In IEEE international conference on robotics and automation, Pasadena, USA (pp. 2171–2176)10.1109/ROBOT.2008.4543528 ↗
11. Jafari, A., Tsagarakis, N. G., & Caldwell, D. G. (2011). A novel intrinsically energy efficient actuator with adjustable stiffness (AwAS). IEEE/ASME Transactions on Mechatronics, 18(1), 355–365.10.1109/TMECH.2011.2177098 ↗
12. Jafari, A., Tsagarakis, N. G., Sardellitti, I., & Caldwell, D. G. (2012). A new actuator with adjustable stiffness based on a variable ratio lever mechanism. IEEE/ASME Transactions on Mechatronics, 19(1), 55–63.10.1109/TMECH.2012.2218615 ↗
13. Sun, J. T., Guo, Z., Zhang, Y. B., Xiao, X. H., & Tan, J. R. (2018). A novel design of serial variable stiffness actuator based on an archimedean spiral relocation mechanism. IEEE/ASME Transactions on Mechatronics, 23(5), 2121–2131.10.1109/TMECH.2018.2854742 ↗
14. Kim, B. S., & Song, J. B. (2012). Design and control of a variable stiffness actuator based on adjustable moment arm. IEEE Transactions on Robotics, 28(5), 1145–1151.10.1109/TRO.2012.2199649 ↗
15. Groothuis, S. S., Rusticelli, G., Zucchelli, A., Stramigioli, S., & Carloni, R. (2013). The variable stiffness actuator vsaUT-II: Mechanical design, modeling, and identification. IEEE/ASME Transactions on Mechatronics, 19(2), 589–597.10.1109/TMECH.2013.2251894 ↗
16. Wolf, S., Eiberger, O., & Hirzinger, G. (2011). The DLR FSJ: Energy based design of a variable stiffness joint. In IEEE international conference on robotics and automation, Shanghai, China (pp. 5082–5089)10.1109/ICRA.2011.5980303 ↗
17. Sun, J. T., Guo, Z., Sun, D. Y., He, S. Y., & Xiao, X. H. (2018). Design, modeling and control of a novel compact, energy-efficient, and rotational serial variable stiffness actuator (SVSA-II). Mechanism and Machine Theory, 130, 123–136.10.1016/j.mechmachtheory.2018.07.024 ↗
18. Li, J., Ma, K., & Wu, Z. (2022). Tracking control via switching and learning for a class of uncertain flexible joint robots with variable stiffness actuators. Neurocomputing, 469, 130–137.10.1016/j.neucom.2021.01.140 ↗
19. Lindenmann, A., Heyden, E., Mas, V., Krause, D., & Matthiesen, S. (2022). Influence of friction bearings on the frequency response of a variable stiffness mechanism. Mechanism and Machine Theory, 168, 104588.10.1016/j.mechmachtheory.2021.104588 ↗
20. Liu, L., Leonhardt, S., Ngo, C., & Misgeld, B. J. (2019). Impedance-controlled variable stiffness actuator for lower limb robot applications. IEEE Transactions on Automation Science and Engineering, 17(2), 991–1004.10.1109/TASE.2019.2954769 ↗
21. Wolf, S., & Hirzinger, G. (2008). A new variable stiffness design: Matching requirements of the next robot generation. In: IEEE international conference on robotics and automation, Pasadena, USA (pp. 1741–1746)10.1109/ROBOT.2008.4543452 ↗
22. Eiberger, O., Haddadin, S., Weis, M., Albu-Schäffer, A., & Hirzinger, G. (2010). On joint design with intrinsic variable compliance: Derivation of the DLR QA-joint. In IEEE international conference on robotics and automation, Anchorage, USA (pp. 1687–1694)10.1109/ROBOT.2010.5509662 ↗
23. Zheng, M., Qian, Z., Zou, Z., Peach, C., Akrami, M., & Ren, L. (2020). Subject-specific finite element modelling of the human shoulder complex part 1: model construction and quasi-static abduction simulation. Journal of Bionic Engineering, 17(6), 1224–1238.10.1007/s42235-020-0098-0 ↗
24. Laribi, M. A., Ceccarelli, M., Sandoval, J., Bottin, M., & Rosati, G. (2022). Experimental validation of light cable-driven elbow-assisting device L-CADEL design. Journal of Bionic Engineering, 19(2), 416–428.10.1007/s42235-021-00133-5 ↗
25. Shang, W. S., Cong, S., Zhang, Y. X., & Liang, Y. Y. (2008). Active joint synchronization control for a 2-DOF redundantly actuated parallel manipulator. IEEE Transactions on Control Systems Technology, 17(2), 416–423.10.1109/TCST.2008.2000978 ↗
26. Zhang, D. B., Hu, D. W., Shen, L. C., & Xie, H. B. (2006). A bionic neural network for fish-robot locomotion. Journal of Bionic Engineering, 3(4), 187–194.10.1016/S1672-6529(07)60002-X ↗
27. Wang, L. K., Chen, C. F., Li, Z. Y., Dong, W., Du, Z. J., Shen, Y., & Zhao, G. Y. (2018). High precision data-driven force control of compact elastic module for a lower extremity augmentation device. Journal of Bionic Engineering, 15(5), 805–819.10.1007/s42235-018-0068-y ↗