Research on pneumatic-electric hybrid control system based on velocity positive feedback in vertical working condition

摘要

The electric actuator has the advantages of simple structure, high positioning precision and strong anti-interference ability. But in the vertical condition, when the load is high, the electric actuator needs to consume great power to keep the load position unchanged. The output of the cylinder is larger, so it is more convenient and energy-saving to maintain the load position in the vertical working condition. However, due to the influence of nonlinear factors such as friction, the positioning accuracy of the pneumatic position servo system is not high. In order to solve the problem of low positioning accuracy of pneumatic servo system and the problem of power consumption of high-power electric actuator, a pneumatic-electric hybrid control system is proposed in this paper. The mathematical model proposed in this paper consists of two sub modules, which are the electric actuator position control module and the aerodynamic servo module. The research results show that the new control system can ensure the positioning accuracy in the case of large output.