مدل سازی عملگر الکتروهیدرواستاتیکی با در نظر گرفتن عوامل موثر در عملکرد و مقایسه آن با مدل سازی سیم هیدرولیک

Hydraulic actuators play an important role in the industry especially in high-tech applications. the automation industry also widely uses electromechanical actuators. electro-hydrostatic actuators combine the advantages of both electromechanical and electro hydraulic actuators, while at the same time omit their flaws. in this paper, first of all, the structure of electro-hydrostatic actuator is described, and then the presented models are examined. in the physical behavior, a complete model of electro-hydrostatic actuator is presented. the proposed model includes all factors that affect performance, such as pressure drop between cylinder and pump, nonlinear friction of electrical motor, nonlinear friction between cylinder and piston and inner circuit including accumulator and check valves). modeling the impact of factors affecting the performance of the actuator output such as piston rod position, differential pressure between cylinder ports and the force generated by actuator are studied. finally the behavior of proposed model is evaluated by a model that is derived from the multiplicity method by matlab-simulink-simhydraulic toolbox.