Uncertain Parameters Performance Evaluation Method for Aviation Electromechanical Actuators

Electromechanical actuator (EMA) is a servo mechanism that controls the flight vehicle in the aerospace field and it has the main advantages of high operating efficiency and easy maintenance. At present, most EMA performance simulation analysis are based on deterministic parameters. In fact, as the working environment and operating conditions change, some inner parameters may be changed and become uncertainly. In this paper, a novel method of EMA performance based on uncertain parameters is proposed to solve the problem that the existing deterministic models are difficult to evaluate the actual performance of EMA. Firstly, a deterministic model is built on the AMESim simulation platform. Then, the probability analysis software NESSUS was used to consider the uncertainty of parameters, and the co-simulation model was established. Finally, the influence of parameter fluctuation on EMA system performance is studied by using this method. Simulation results verify the correctness of the proposed method. Compared with the traditional simulation method based on parameter determination, the model built by this method has higher precision, and the simulation results are closer to the real EMA prototype.