This work investigates issues related to vibration control in a micro/macro manipulator. This paper provides experimental results obtained by the combination of two dissimilar flexible control techniques to a micro/macro flexible link testbed. Inertial damping and command filtering techniques are implemented simultaneously to form a robust controller that results in minimal residual vibration due to commanded movements or external excitations. Experimental results show the effectiveness of both control techniques in their individual state as well as the improved performance resulting Pom their combination. The experimental results of the combined controller clearly show the advantages of each technique.

This paper describes a new control approach that combines command shaping and inertial damping to control small robots that are attached to the end of a flexible manipulator. The command shaping guarantees that the level of vibration will be minimized during the robot motion and the inertial damping removes any residual effects after the motion is complete. Experimental results from two different test beds verifY the effectiveness of the combined approach for minimizing vibration in elastic systems.

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Pacific Northwest Laboratory (PNL) researchers investigated the combined use of two control approaches to minimize micro/macro-manipulator structural vibration: 1) modified input shaping and 2) inertial force active damping control. Modified input shaping (MIS) is used as a feedforward controller to modify reference input by canceling the vibratory motion. Inertial force active damping (IFAD) is applied as a feedback controller to increase the system damping and robustness to unexpected disturbances.Researchers implemented both control schemes in the PNL micro/macro flexible-link manipulator testbed collaborating with Georgia Institute of Technology. The experiments successfully demonstrated the effectiveness of two control approaches in reducing structural vibration.