Volume 36, Number 1, February 2018
|Page(s)||7 - 12|
|Published online||18 May 2018|
High Fidelity Modeling Method of High Performance Electromechanical Actuator
Institute of Precision Guidance and Control, Northwestern Polytechnical University, Xi'an 710072, China
The accuracy of high performance electromechanical actuator(EMA) system model has important influence on the simulation accuracy of aircraft guidance and control loop. Aiming at solving the deficiency in the reflection of EMA characteristics using traditional second-order model, a high-fidelity global coupling modular structure modeling method is proposed. Based on the analysis of the modeling process, high-fidelity modeling research is conducted on "BLDCM/ball screw/fork" type EMA systems. The structure of high fidelity model is investigated, and modeling methods of nonlinear factors such as servo motor, transmission ratio, mechanical inertia and transmission flexibility in the system are examined in detail. Simulation results based on simulink platform show that the high fidelity model established by this method is highly consistent with the actual system performance of the input-output characteristics and the internal state characteristics, ensuring the authenticity of the system model, which plays an important effect on improving the simulation accuracy of the aircraft guidance and control loop.
Key words: electromechanical actuator (EMA) / high fidelity modeling, global coupled modular structure / modularization modeling / electromechanical system / BLDCM / nonlinear factors, ball screw / transmission ratio / mechanical inertia / transmission flexibility / angular velocity / servo system / MATLAB / simulation
关键字 : 电动舵机 / 高保真建模 / 全局耦合结构 / 模块化 / 机电系统
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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