Twisted String Actuation Systems: A Study of the Mathematical Model and a Comparison of Twisted Strings

This paper presents an improved mathematical model of a twisted string transmission system. The proposed mathematical model has been validated experimentally and provided a better match with the practical data in comparison with the conventional model. Translational transmission systems based on twisted strings coupled with electric motors can compose light-weight, compact, and mechanically simple actuators that can be used in various robotic applications. An extensive experimental study on the performance of different types of strings during twisting is presented. The drawbacks and advantages of each type of strings, along with some of their properties, are discussed.

[1]  M. Suzuki,et al.  Redundant muscle coordination of a multi-DOF robot joint by online optimization , 2007, 2007 IEEE/ASME international conference on advanced intelligent mechatronics.

[2]  Takashi Sonoda,et al.  Performance evaluation of twisted strings driven robotic finger , 2011, 2011 8th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI).

[3]  C. Natale,et al.  Modeling and Control of the Twisted String Actuation System , 2013, IEEE/ASME Transactions on Mechatronics.

[4]  Takashi Sonoda,et al.  A Five Fingered Robotic Hand Prototype by using Twist Drive , 2010, ISR/ROBOTIK.

[5]  Takashi Sonoda,et al.  Robotic finger with coupled joints: A prototype and its inverse kinematics , 2010, 2010 11th IEEE International Workshop on Advanced Motion Control (AMC).

[6]  Takashi Sonoda,et al.  Position and force control of a robotic finger with twisted strings actuation , 2011, 2011 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM).

[7]  Dmitry Popov,et al.  A study on twisted string actuation systems: Mathematical model and its experimental evaluation , 2012, 2012 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[8]  C. Natale,et al.  The twisted string actuation system: Modeling and control , 2010, 2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

[9]  M. Suzuki,et al.  A method of real-time coordination of redundant muscles for multi-DOF robot joints , 2007, SICE Annual Conference 2007.

[10]  Takashi Sonoda,et al.  Multi-fingered robotic hand employing strings transmission named “Twist Drive” , 2010, 2010 IEEE/RSJ International Conference on Intelligent Robots and Systems.