Motion Control Considering Fusion of Mechanical and Virtual Impedance in Mobile Robot Systems

In recent years, the applications of robots have diversified, and interest in application to human living environment has increased. To co-exist with robots,it is necessary to ensure safety against collision. Conventional collision detection with a force sensor and collision mitigation by impedance control only have low adaptability. In thispaper, collision mitigation by combination of flexible structure and impedance control is proposed. Collision detection is performed by Load Disturbance OBserver (LDOB). In addition, switching control of the collision mitigation and damper control based on the estimated disturbance torque according to the environmental situation is proposed. Simulations are conducted forverifying the proposed approach.