Dynamic force equalization for dissimilar redundant actuator system

With the development of key technologies about more/all electric aircraft (MEA/AEA), the dissimilar redundant actuator system (DRAS) which consists of power-by-wire actuators, EMA and EHA, indicates the trend of more-electric-aircraft. First of all, the construction and the working principle of the dissimilar redundant actuator system were described. The force fighting model within dissimilar redundant actuator system was built up. The mechanism of dynamic force fighting was introduced. Three kinds of dynamic force equalization for eliminating dynamic force fighting, such as trajectory pre-compensator strategy, force fighting feedback with PID compensator strategy, EHA force/EMA position strategy were put forward and theoretically discussed. Finally, a comparative simulation was exhibited for the three control strategies, and a detailed analysis of the simulation result was provided within the two aspects of the pursuit dynamics and the rejection dynamics of the dissimilar redundant actuator system. The results provide theoretical basis for the design and force equalization of the dissimilar redundant actuator system.