Simulation of Direct Drive Electromechanical Actuator with Ballscrew

The paper contains the description of electromechanical actuator (EMA) dynamic mathematical model developed by TsAGI in the frame of European-Russian collaborative project «RESEARCH» for the direct drive electromechanical actuator which was under CESA company development. The model was implemented within the MATLAB/Simulink software. The major focus of the model is the modularization and scalability of actuator components, as well as the focus on actuator mechanical non-linearities in the region of low input control signals as well as the possibility to use that model for flight mission cavity thermal analysis. The model has various switchable levels of components detail, which provides a balance between the accuracy and the value of the integration step in dealing with a variety of modeling tasks. Due to the possibility of taking into account a number of factors it can be used for tasks of two types. At first, it can be used for tasks requiring small integration step and high precision simulation of high-frequency processes (detailed analysis of the static and dynamic characteristics of EMA, the optimization of actuator heat dissipation, controller setting, etc.). Also it can be used for the tasks requiring rapid model calculation (analysis of the closed-loop stability «aircraft-flight control system-actuator», actuator characteristics evaluation, etc.).