Abstract
Recently, variable stiffness actuators (VSAs) have been introduced for reducing the input efforts of pick-and-place robots. However, the serial arrangement of springs and motors in the VSAs decreases the accuracy at high-speeds due to uncontrolled robot deflections. To ensure accuracy while reducing the input efforts, this paper proposes the use of variable stiffness springs (VSS) in parallel configuration with the motors. The parallel arrangement of VSS and motors is combined with a shooting method to adjust the stiffness of the system in order to enforce its limit cycle to converge to a desired trajectory, and, thus, to decrease the input torques. Numerical simulations of the suggested approach on a five-bar mechanism show the reduction of the robot input efforts.
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References
Clavel, R.: Device for the movement and positioning of an element in space. US Patent 4,976,582, December 1990
Baradat, C., Arakelian, V., Briot, S., Guégan, S.: Design and prototyping of a new balancing mechanism for spatial parallel manipulators. ASME J. Mech. Des. 130(7) (2008)
Briot, S., Baradat, C., Guégan, S., Arakelian, V.: Contribution to the improvement of the medical device SurgiScope®. In: Proceedings of the 2007 ASME International Design Engineering Technical Conferences (DETC 2007), Las Vegas, Nevada, USA, September 2007
Briot, S., Arakelian, V.: A new energy-free gravity-compensation adaptive system for balancing of 4-DOF robot manipulators with variable payloads. In: Proceedings of the 14th IFToMM World Congress (2015 IFToMM World Congress), Taipei, Taiwan, October 2015
Briot, S., Arakelian, V., Sauvestre, N., Le Baron, J.-P.: Shaking forces minimization of high-speed robots via an optimal motion planning. In: Proceedings of the 18th CISM-IFToMM Symposium on Robot Design, Dynamics, and Control (ROMANSY 2010), Udine, Italy, July 2010
Uemura, M., Kawamura, S.: Resonance-based motion control method for multi-joint robot through combining stiffness adaptation and iterative learning control. In: IEEE International Conference on Robotics and Automation, Kobe, Japan, pp. 1543–1548 (2009)
Goya, H., Matsusaka, K., Uemura, M., Nishioka, Y., Kawamura, S.: Realization of high-energy efficient pick-and-place tasks of scara robots by resonance. In: IEEE/RSJ International conference on Intelligent Robots and Systems, IROS 2012, pp. 2730–2735, Vilamoura, Algarve (Portugal), October 2012
Hollander, K., Sugar, T.: Concepts for compliant actuation in wearable robotic systems. In: Proceedings of the US-Korea Conference on Science, Technology and Entrepreneurship (UKC 2004), vol. 128, pp. 644–650 (2004)
Barreto, J.P., Schöler, F.J.-F., Corves, B.: The concept of natural motion for pick and place operations. In: New advances in mechanisms, mechanical transmissions and robotics, pp. 89–98. Springer
Schiehlen, W., Guse, N.: Control of limit cycle oscillations. In: Proceedings of the IUTAM Symposium on Chaotic Dynamics and Control of Systems and Processes in Mechanics, pp. 429–439 (2005)
Schiehlen, W., Iwamura, M.: Minimum energy control of multibody systems utilizing storage elements. In: Proceedings of DETC 2009, ASME DETC 2009 86327 (2009)
Briot, S., Bouton, N., Bigras, P.: Controlling parallel robots during singular assembly mode changing. In: Proceedings of the 4th Joint International Conference on Multibody System Dynamics. Montreal, Canada, May 2016
Merlet, J.-P.: Parallel Robots. Springer (2006). ISBN 978-1-4020-4133-4
Acknowledgment
This work was conducted with the support of the Mexican Council for Science and Technology (CONACYT).
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Hill, R.B., Briot, S., Chriette, A., Martinet, P. (2019). Minimizing Input Torques of a High-Speed Five-Bar Mechanism by Using Variable Stiffness Springs. In: Arakelian, V., Wenger, P. (eds) ROMANSY 22 – Robot Design, Dynamics and Control. CISM International Centre for Mechanical Sciences, vol 584. Springer, Cham. https://doi.org/10.1007/978-3-319-78963-7_9
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DOI: https://doi.org/10.1007/978-3-319-78963-7_9
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