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A novel variable stiffness mechanism with linear spring characteristic for machining operations

Published online by Cambridge University Press:  09 June 2016

Ngoc-Dung Vuong ,
Renjun Li ,
Chee-Meng Chew ,
Amir Jafari  and
Joseph Polden
Ngoc-Dung Vuong
Affiliation:
SIMTech, 71 Nanyang Drive, 638075, Singapore. E-mail: [email protected]
Renjun Li
Affiliation:
National University of Singapore, 9 Engineering Drive 1, 117576, Singapore. E-mail: [email protected], [email protected]
Chee-Meng Chew
Affiliation:
National University of Singapore, 9 Engineering Drive 1, 117576, Singapore. E-mail: [email protected], [email protected]
Amir Jafari
Affiliation:
Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA E-mail: [email protected]
Joseph Polden*
Affiliation:
SIMTech, 71 Nanyang Drive, 638075, Singapore. E-mail: [email protected]
*
*Corresponding author. E-mail: [email protected]
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Summary

Variable stiffness mechanisms are able to mechanically reconfigure themselves in order to adjust their system stiffness. It is generally accepted that only antagonistic designs, featuring quadratic springs, can produce linear spring-like behaviour (i.e., a linear relationship between the displacement and its resultant force). However, these antagonistic designs typically are not as energy efficient as series-based designs. In this work, we propose a novel variable stiffness mechanism that can achieve both linear-spring behaviour whilst maintaining an energy efficient characteristic. This paper will present the working principle, mechanical design and characterization of the joints stiffness properties (verified via experimental procedure). The pros and cons of this novel design with reference to the other Variable Stiffness Actuator (VSA) designs will be discussed based on experimental results and in the context of general machining tasks.

Type
Articles
Information
Robotica , Volume 35 , Issue 7 , July 2017 , pp. 1627 - 1637
Copyright
Copyright © Cambridge University Press 2016 

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References

1. Lim, C. W. and Tao, P. Y., “Enhancing robotic applications in the industry through force control,” Singapore Institute of Manufacturing Technology, Tech. Rep. (2010).Google Scholar
2. Teo, W. K., Tao, P. Y., Lai, C. Y., Lim, T. M. and Subbiah, S., “Machining method [US 20140154470],” (2014).Google Scholar
3. Pratt, G., Williamson, M., Dillworth, P., Pratt, J. and Wright, A., “Stiffness isn't everything,” Exp. Robot. IV, Springer (1997) pp. 253–262.Google Scholar
4. Robinson, D. W., “Design and Analysis of Series Elasticity in Closed-loop Actuator Force Control by,” PhD Thesis, MIT, 2000.Google Scholar
5. Wolf, S., Eiberger, O. and Hirzinger, G., “The DLR FSJ: Energy Based Design of a Variable Stiffness Joint,” Proceedings of the 2011 IEEE International Conference on Robotics and Automation (ICRA), Shanghai, China (May 2011) pp. 5082–5089.CrossRefGoogle Scholar
6. Zinn, M., Roth, B., Khatib, O. and Salisbury, J. K., “A new actuation approach for human friendly robot design,” Int. J. Robot. Res. 23 (4–5), 379–398 (2004).CrossRefGoogle Scholar
7. Migliore, S. A., Brown, E. A. and Deweerth, S. P., “Biologically Inspired Joint Stiffness Control,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Barcelona, Spain (Apr. 2005) pp. 4508–4513.Google Scholar
8. Hurst, J. W., Chestnutt, J. E. and Rizzi, A. A., “The actuator with mechanically adjustable series compliance,” IEEE Trans. Robot. 26 (4), 597–606 (2010).CrossRefGoogle Scholar
9. Daerden, F. and Lefeber, D., “Pneumatic artificial muscles: Actuators for robotics and automation,” Eur. J. Mech. Environ. Eng. 47 (1), 11–21 (2002).Google Scholar
10. Tonietti, G., Schiavi, R. and Bicchi, A., “Design and Control of a Variable Stiffness Actuator for Safe and Fast Physical Human/Robot Interaction,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), IEEE, Barcelona, Spain (2005) pp. 526–531.Google Scholar
11. Schiavi, R., Grioli, G., Sen, S. and Bicchi, A., “VSA-II: A Novel Prototype of Variable Stiffness Actuator for Safe and Performing Robots Interacting with Humans,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Pasadena, California, USA (May 2008) pp. 2171–2176.CrossRefGoogle Scholar
12. Catalano, M. G., Grioli, G., Garabini, M., Bonomo, F., Mancini, M., Tsagarakis, N. and Bicchi, A., “VSA-CubeBot: A Modular Variable Stiffness Platform for Multiple Degrees of Freedom Robots,” Proceedings - IEEE International Conference on Robotics and Automation, Shanghai, China (2011) pp. 5090–5095.Google Scholar
13. Petit, F. and Chalon, M., “Bidirectional Antagonistic Variable Stiffness Actuation: Analysis, Design & Implementation,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Anchorage, Alaska, USA (2010) pp. 4189–4196.Google Scholar
14. Van, R. Ham, Vanderborght, B., Van Damme, M., Verrelst, B. and Lefeber, D., “MACCEPA, the mechanically adjustable compliance and controllable equilibrium position actuator: Design and implementation in a biped robot,” Robot. Auton. Syst. 55 (10), 761–768 (2007).CrossRefGoogle Scholar
15. Vanderborght, B., Tsagarakis, N. G., Van Ham, R., Thorson, I. and Caldwell, D. G., “MACCEPA 2.0: Compliant actuator used for energy efficient hopping robot Chobino1D,” Auton. Robots 31 (1), 55–65 (2011).CrossRefGoogle Scholar
16. Wolf, S. and Hirzinger, G., “A New Variable Stiffness Design: Matching Requirements of the Next Robot Generation,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), IEEE, Pasadena, California, USA (May 2008) pp. 1741–1746.CrossRefGoogle Scholar
17. Park, J. J., Song, J. B. and Kim, H. S., “Safe Joint Mechanism Based on Passive Compliance for Collision Safety,” Lecture Notes in Control and Information Sciences, vol. 370 (2008) pp. 49–61.Google Scholar
18. Park, J. J. and Song, J. B., “Safe Joint Mechanism using Inclined Link with Springs for Collision Safety and Positioning Accuracy of a Robot Arm,” Proceedings - IEEE International Conference on Robotics and Automation, Anchorage, Alaska, USA (2010) pp. 813–818.Google Scholar
19. Jafari, A., Tsagarakis, N. G. and Caldwell, D. G., “A novel intrinsically energy efficient actuator with adjustable stiffness (AwAS),” IEEE/ASME Trans. Mechatronics 18 (1), 355–365 (2013).CrossRefGoogle Scholar
20. Jafari, A., Tsagarakis, N. G. and Caldwell, D. G., “AwAS-II: A New Actuator with Adjustable Stiffness Based on the Novel Principle of Adaptable Pivot Point and Variable Lever Ratio,” Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), IEEE (May 2011) pp. 4638–4643.CrossRefGoogle Scholar
21. Tsagarakis, N. G., Sardellitti, I. and Caldwell, D. G., “A new variable stiffness actuator (CompAct-VSA): Design and modelling,” Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), San Francisco, California, USA (2011) pp. 378–383.Google Scholar
22. Visser, L. C., Carloni, R. and Stramigioli, S., “Energy-efficient variable stiffness actuators,” IEEE Trans. Robot. 27 (5), 865–875 (2011).CrossRefGoogle Scholar
23. Carloni, R., Visser, L. C. and Stramigioli, S., “Variable stiffness actuators: A port-based power-flow analysis,” IEEE Trans. Robot., St. Paul, Minnesota, USA 28 (1), 1–11 (2012).CrossRefGoogle Scholar
24. Jafari, A., Tsagarakis, N. G., Sardellitti, I. and Caldwell, D. G., “How Design can Affect the Energy Required to Regulate the Stiffness in Variable Stiffness Actuators,” Proceedings - IEEE International Conference on Robotics and Automation, St. Paul, Minnesota, USA (2012) pp. 2792–2797.Google Scholar