Air strategy and Application of PP bi Directional Air Cylinder Positioning System

The characteristics of the cylinder and the characteristics of the valve are the main factors that affect the pneumatic position control system. Firstly the dynamic and static characteristics of the cylinder has carried on the theoretical analysis, to construct the cylinder through the experimental dynamics, the proportional directional control valve flow characteristics of the approximate mathematical model, of gas moving conveyor position control system, a nonlinear mathematical model is established, and by means of computer simulation technology on the system characteristics were studied, discussed the influence of system parameters on the performance of the system, that system open-loop frequency response characteristics. On the basis of this, the control strategy of the pneumatic proportional directional control system is studied. Because of the serious nonlinear system, it is difficult to obtain good control effect by using classical control methods (such as PID control), which is not suitable for the occasion of control object parameter variation and nonlinear degree. A new control algorithm is proposed in this paper, that is, zero - pole assignment self-tuning adaptive control algorithm, combined with PID adjustment, combined with on-site integration. The results showed that compared with only using PID control, the proposed control strategy can significantly improve the system dynamic performance.