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Force control of a single-link flexible robot based on a collision detection mechanism

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2 Author(s)
A. Garcia ; ETSI Ind., Castilla-La Mancha Univ., Ciudad Real, Spain ; V. Feliu

The paper studies the use of flexible robots in tasks that require a contact with the environment. Here a flexible robot has the advantage that the energy of the collision can be absorbed by the robot structure instead of by the environment. First, a tip position control method of a single-link flexible robot for collision-free trajectories is presented. This method offers a behaviour of the flexible robot similar to that of a rigid robot under the same working conditions. We also make a comparison among different force control methods. Experimental results are shown that validate the study. The feasibility of the proposed force control is validated from the good collision detection results obtained. The result was made possible by the reliability of the position control method and the detailed analysis made of the reference signal. The approach presented can be generalised for the control of more complex arms

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IEE Proceedings - Control Theory and Applications  (Volume:147 ,  Issue: 6 )