(Georgia Institute of Technology, 1995-09)
Lew, Jae Young; Cannon, David W.; Magee, David P.; Book, Wayne J.
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 (IF AD) 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. Based on the results of the experiments, the combined use of two controllers is recommended for a micro/macro manipulator to achieve the fastest response to commands while canceling disturbances from unexpected forces.