ICRA 2012 Paper Abstract

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Paper WeC03.6

Abdallah, Muhammad (General Motors R&D), Platt, Robert (MIT), Hargrave, Brian (Oceaneering Space Systems), Permenter, Frank (Oceaneering Space Systems)

Position Control of Tendon-Driven Fingers with Position Controlled Actuators

Scheduled for presentation during the Regular Session "Underactuated Grasping" (WeC03), Wednesday, May 16, 2012, 15:45−16:00, Meeting Room 3 (Mak'to)

2012 IEEE International Conference on Robotics and Automation, May 14-18, 2012, RiverCentre, Saint Paul, Minnesota, USA

This information is tentative and subject to change. Compiled on October 24, 2017

Keywords Multifingered Hands, Tendon/Wire Mechanism, Motion Control of Manipulators

Abstract

Conventionally, tendon-driven manipulators implement some force-based controller using either tension feedback or dynamic models of the actuator. The force control allows the system to maintain proper tensions on the tendons. In some cases, whether it is due to the lack of tension feedback or actuator torque control, a purely position-based controller is needed. This work compares three position controllers for tendon-driven manipulators that implement a nested actuator position controller. A new controller is introduced that achieves the best overall performance with regards to speed, accuracy, and transient behavior. To compensate for the lack of tension control, the controller nominally maintains the internal tension on the tendons through a range-space constraint on the actuator positions. These control laws are validated experimentally on the Robonaut-2 humanoid hand.

 

 

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