Stiffness control for geared manipulators

This paper presents the results from an experimental investigation into the performance of stiffness control, implemented on a two degree-of-freedom manipulator that uses harmonic drive gears. Stiffness control, which is the simplest form of impedance control, was implemented using force feedback. The results demonstrate the benefits of using force feedback to compensate for static friction effects and for the difficulty in accurately controlling the joint torques for geared manipulators.

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