Deflection-based force sensing for continuum robots: A probabilistic approach

The inherent flexibility of continuum robots allows them to interact with objects in a safe and compliant way. This flexibility also makes it possible to use robot deflection to estimate external forces applied to the robot. This “intrinsic force sensing” concept is particularly useful for thin continuum robots where application constraints preclude the use of traditional force sensors. This paper describes an Extended Kalman Filter approach to estimate forces applied at the tip of a continuum robot using only uncertain pose measurements and a kinematic-static model of the robot with uncertainty.

[1]  S. Antman.  Nonlinear problems of elasticity , 1994 .

[2]  J. Bruce C. Davies,et al.  Continuum robots - a state of the art , 1999, Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C).

[3]  Nabil Simaan,et al.  Finding lost wrenches: Using continuum robots for contact detection and estimation of contact location , 2010, 2010 IEEE International Conference on Robotics and Automation.

[4]  D. Caleb Rucker,et al.  A Geometrically Exact Model for Externally Loaded Concentric-Tube Continuum Robots , 2010, IEEE Transactions on Robotics.

[5]  Robert J. Webster,et al.  Design and Kinematic Modeling of Constant Curvature Continuum Robots: A Review , 2010, Int. J. Robotics Res..

[6]  John Kenneth Salisbury,et al.  Mechanics Modeling of Tendon-Driven Continuum Manipulators , 2008, IEEE Transactions on Robotics.

[7]  Ian D. Walker,et al.  Soft robotics: Biological inspiration, state of the art, and future research , 2008 .

[8]  D. Caleb Rucker,et al.  Statics and Dynamics of Continuum Robots With General Tendon Routing and External Loading , 2011, IEEE Transactions on Robotics.

[9]  Bryan A. Jones,et al.  Three dimensional statics for continuum robotics , 2009, 2009 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[10]  Ian A. Gravagne,et al.  Manipulability, force, and compliance analysis for planar continuum manipulators , 2002, IEEE Trans. Robotics Autom..

[11]  Ian D. Walker,et al.  Design, analysis and experimentation: the fundamentals of continuum robotic manipulators , 2002 .

[12]  D. Caleb Rucker,et al.  Computing Jacobians and compliance matrices for externally loaded continuum robots , 2011, 2011 IEEE International Conference on Robotics and Automation.

[13]  Kai Xu,et al.  Intrinsic Wrench Estimation and Its Performance Index for Multisegment Continuum Robots , 2010, IEEE Transactions on Robotics.

[14]  Christopher D. Rahn,et al.  Geometrically Exact Models for Soft Robotic Manipulators , 2008, IEEE Transactions on Robotics.

[15]  Kai Xu,et al.  An Investigation of the Intrinsic Force Sensing Capabilities of Continuum Robots , 2008, IEEE Transactions on Robotics.