Motion synchronization control for a large civil aircraft's hybrid mechatronics actuation system using observer-based backstepping control

Abstract

The electro-mechanical and servo-hydraulic actuators that make up the hybrid mechatronics actuation system must be synchronized in motion for all mechatronics applications, but particularly for big civil aircraft. Force fighting which is the difference of force between two actuators when both actuators are pushing together the control surface. Force fighting problem takes birth when both actuators are not synchronized in a hybrid mechatronics actuation system. The present research addresses the issue of force fighting and aims to enhance motion synchronization. An observer-based backstepping control strategy is proposed to achieve synchronized motion in a hybrid mechatronic actuation system. Furthermore, Trajectory generates acceleration, velocity, and position signals at a frequency that both servo hydraulic and electro mechanical actuator can easily follow. Extended state observer is designed to cope the problems such as uncertainties, coupling terms, disturbances as well as unavailability of state signals which are very important for motion synchronization. In order to confirm whether the suggested approach is effective, simulation experiments are performed in Matlab/Simulink. A comparison was made between the results of this study and previously published works. Comparison shows that proposed strategy is more effective in reducing force force fighting, improving load rejection performance and synchronizing motion in hybrid mechatronics actuation system