Experimental study on active vibration control using genetic algorithm-based system identification and optimized positive position feedback

A genetic algorithm is implemented to identify the transfer function of an experimental system consisting of a flexible manipulator with a collocated piezoelectric sensor/actuator pair. A multi-mode positive position feedback controller is then designed based upon the identified transfer function. To this end, the same iteratively implemented genetic algorithm is used to optimize all controller parameters by minimization of the closed loop H ∞ -norm. The designed controller is then applied for vibration suppression on the experimental system.