Abstract
When a manipulator is handled with human force, it is necessary to reduce reaction force caused by inertia, friction, gravity, etc. This paper describes an active power assistance system for a direct-drive manipulator, which assists handling force with motor, and force detection system for that purpose. This method detect handling force by combination of motor-torque detection with motor-current and rotation detection with internal sensors (tacho-generator etc.) . It does not need special force sensors. Some configurations of power assistance system are also shown. Effectiveness of the proposed method is demonstrated by feasibility experiments.
