EHA作动器建模与仿真分析

电静液作动器(EHA)能够实现故障安全,不存在机械卡死等,在大功率的场合功重比优势明显,因此可应用到飞机主舵面的伺服控制系统中.介绍EHA的组成、工作原理和功能组件的作用,详细推导了EHA伺服作动系统三环闭环控制情况下的数学模型,并在此基础上进行频域分析,设计伺服回路参数,在AMESim仿真平台上搭建了EHA伺服作动系...

Modeling and Simulation of Electro-Hydrostatic Actuator

The electro-hydraulic actuator (EHA) can achieve fault-safety without mechanical jamming and other faults,and has obvious power weight ratio advantage for high power applications.Therefore,it can be applied to servo control system of aircraft main control surface.EHA composition,working principle and the function of functional components were introduced.The mathematical model of the EHA servo system under three loop closed-loop control was derived in detail,the frequency domain analysis was carried out and the servo parameters were designed.The simulation model of the EHA servo system was built in AMESim.The derived EHA mathematical modeling method can be used to design the parameters of EHA servo circuit and analyze the sensitivity of key parameters.The simulation method contributes to verify EHA servo system performance at design beginning and provides theoretical basis for EHA physical design.