Synchronised trajectory-tracking control of multiple 3-DOF experimental helicopters

A synchronised trajectory-tracking control strategy is proposed for multiple experimental three-degrees-of-freedom helicopters. The model-based controller includes a feedforward compensation term and a PD feedback control term. Asymptotic convergence is achieved for both trajectory tracking and motion synchronisation. A proposed generalised synchronisation error concept allows the design of different synchronisation strategies so that different synchronisation performance can be reached. Experimental results verify the effectiveness of the proposed controller.