Flexible fluidic actuators: Determining force and position without force or position sensors

Flexible fluidic actuators present a lot of nice features regarding applications in the medical field and in the field of robotics. For example, they own a natural compliance and they can be very lightweight. Besides, an interesting measuring concept seems to be applicable to them: it is possible to determine and control the position of the actuator and the force it develops thanks to the measures of the fluid pressure and of the volume of supplied fluid. This means being able to determine and control the position of the actuator and the force it develops without displacement or force sensors. We validate experimentally this measuring concept in the case of a specific actuator and a method to model the behaviour of flexible fluidic actuators having one degree of freedom is proposed. Besides, the advantages and difficulties brought by this measuring concept are discussed.

[1]  Alain Delchambre,et al.  Towards flexible medical instruments: Review of flexible fluidic actuators , 2009 .

[2]  Koji Ikuta,et al.  Micro hydrodynamic actuated multiple segments catheter for safety minimally invasive therapy , 2003, 2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422).

[3]  S. Konishi,et al.  Thin flexible end-effector using pneumatic balloon actuator , 2000, Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308).

[4]  Christine Prelle.  Contribution au contrôle de la compliance d'un bras de robot à actionnement électropneumatique , 1997 .

[5]  S. SCHULZ,et al.  A new ultralight anthropomorphic hand , 2001, Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164).

[6]  Satoshi Konishi,et al.  Fluid-Resistive Bending Sensor Compatible with a Flexible Pneumatic Balloon Actuator , 2008, J. Robotics Mechatronics.

[7]  M. Mack,et al.  Initial prospective multicenter clinical trial of robotically-assisted coronary artery bypass grafting. , 2001, The Annals of thoracic surgery.

[8]  Andrea Manuello Bertetto,et al.  A Novel Fluidic Bellows Manipulator , 2004, J. Robotics Mechatronics.

[9]  Guillaume Thomann.  Contribution à la chirurgie minimalement invasive : conception d'un coloscope intelligent , 2003 .

[10]  Jan Peirs,et al.  A micro optical force sensor for force feedback during minimally invasive robotic surgery , 2003 .

[11]  D. Sallé.  Conception optimale d'instruments robotisés à haute mobilité pour la chirurgie mini-invasive , 2004 .