Nonlinear modeling of low cost force sensors

In this paper, nonlinear modeling of low cost force sensors is considered for force control applications in robotic or biomechanical applications. Commercial force sensors are often expensive, with a limited use in severe conditions such as the presence of a strong magnetic field. On the contrary, thin film piezoresistive sensors such as the Tekscan Flexiforce and the Interlink FSR sensors are of low cost and can be considered in such an environment. Only a few information is however available on their dynamic properties. We therefore provide an experimental study of their dynamic behavior, showing nonlinear properties. Identification is then achieved, and a compensation model is proposed. A force control experiment is finally presented to evaluate the compensation scheme.

[1]  Arnaud Faivre.  Conception et validation d'un nouvel outil d'analyse clinique de la marche , 2003 .

[2]  Etienne Burdet,et al.  Design of a simple MRI/fMRI compatible force/torque sensor , 2004, 2004 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) (IEEE Cat. No.04CH37566).

[3]  Mark R. Cutkosky,et al.  Force Sensing Robot Fingers using Embedded Fiber Bragg Grating Sensors and Shape Deposition Manufacturing , 2007, Proceedings 2007 IEEE International Conference on Robotics and Automation.

[4]  A Cliquet,et al.  A low-cost instrumented glove for monitoring forces during object manipulation. , 1997, IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society.

[5]  Dan Stoianovici,et al.  Automatic Brachytherapy Seed Placement Under MRI Guidance , 2007, IEEE Transactions on Biomedical Engineering.

[6]  Philippe Poignet,et al.  SCALPP: A Safe Methodology to Robotize Skin Harvesting , 2001, MICCAI.

[7]  Karol Miller,et al.  MRI Guided Surgical Robot , 2001 .

[8]  Tsukasa Ogasawara,et al.  An Optical 6-Axis Force Sensor for Brain Function Analysis using fMRI , 2004 .

[9]  Eric Degoulange.  Commande en effort d'un robot manipulateur à deux bras : application au contrôle de la déformation d'une chaîne cinématique fermée , 1993 .

[10]  P. Dario,et al.  Experimental Evaluation of Two Commercial Force Sensors for Applications in Biomechanics and Motor Control , 2001 .

[11]  Russell H. Taylor,et al.  A Steady-Hand Robotic System for Microsurgical Augmentation , 1999 .

[12]  Edouard Laroche,et al.  Robotic image-guided transcranial magnetic stimulation , 2006 .

[13]  Yong-Ku Kong,et al.  Optimal cylindrical handle diameter for grip force tasks , 2005 .