Title :
Optimal variable impedance control for a robot and its application to lifting an object with a human
Author :
Ikeura, Ryojun ; Moriguchi, Tomoki ; Mizutani, Kazuki
Author_Institution :
Dept. of Mech. Eng., Mie Univ., Japan
Abstract :
This paper describes a control method of a robot cooperating with a human. A task in which a robot and a human move an object cooperatively is considered To develop the force controller of the robot, the characteristics of human arm are investigated. The arm is forced to move along a trajectory in the experiment and the exerted force and the displacement are analyzed. It is found that the force characteristics of the human arm is regarded as an optimal damper with minimizing a cost function. Then, the model is implemented to a robot and the cooperation of the robot and a human operator is examined. The effectiveness of the derived model is evaluated and the experimental results show that the human moves the object supported by the robot with a minimum jerk trajectory. Next, the proposed control method is applied to a task in which a human and a robot lift an object cooperatively. The results show the effectiveness of the proposed control method.
Keywords :
damping; mobile robots; optimal control; force controller; optimal damper; optimal variable impedance control; robot cooperating; Automatic control; Cost function; Damping; Humans; Impedance; Medical robotics; Optimal control; Orbital robotics; Robot control; Robotics and automation;
Conference_Titel :
Robot and Human Interactive Communication, 2002. Proceedings. 11th IEEE International Workshop on
Print_ISBN :
0-7803-7545-9
DOI :
10.1109/ROMAN.2002.1045671