System for Synchronizing Forces of Dissimilar Flight Control Actuators with a Common Controller

The summation of forces on a common control surface coming from dissimilar flight control actuators, which satisfy demanding requirements to the reliability of civil airplanes, by using dissimilar actuation systems consisting of one electro-hydrostatic actuator (EHA) and one electro-mechanical actuator (EMA) needs a control system to be created that would equalize forces and actuators’ force fighting. Simulations of flight control actuators include nonlinear friction forces in an engine and an actuator as well as elastic linkage. A comparative research of control algorithms was done taking into account system stability with force fighting equalization of flight control actuators.