Synchronous controller design for dissimilar redundant actuation system of large civil aircraft

Dissimilar redundant actuation system has high reliability because of getting rid of central hydraulic power and avoiding common cause failures, which conform to the development trend of future actuation systems in large civil aircraft. Despite these advantages, force fighting widely exists in dissimilar redundant actuation systems due to the different driving principle and system parameters of different actuators. All these factors can affect output precision, shorten operation life, or even lead to system failure. To cope with this problem, this paper proposes a new adaptive decoupling controller based on motion state synchronization. The parameter adaption law is designed for the parametric uncertainties in the dissimilar redundant actuation system and motion state synchronization is proposed to deal with the differences between two different actuators. The comparative simulation results between the proposed algorithm and traditional method indicate that the proposed synchronous controller is capable of achieving better tracking control performance and effectively solving the force fighting problem between different actuators.