自调整PID控制在卷取张力中的设计与仿真

Design and Simulation of Self-adaptive PID Control System in Tension Control

目的设计模糊PID变频调速自调整控制系统以克服纸张卷取张力控制不稳定现象。方法采用西门子全数字交流调速的控制方法,由速度及压力检测元件组成的张力控制系统,针对传统PID控制参数固定,将模糊算法应用于系统设计中,对系统调节器输出滤波处理,并将生产线速度变化作为前馈量加到控制器输出,进而提高调节器与生产线速度变化的跟踪能力。结论该自调整PID控制方法具有良好的控制效果,为工业过程非线性、时滞系统的张力控制提供了一种有效的控制方案。

Objective Fuzzy PID self-adaptive control system is applied to solve the tension control instability problem during paper winding in the variable frequency speed regulation system. Methods The system adopted the Siemens digital ac speed control method. Using a tension control system composed of speed and pressure detecting elements, the authors applied PID and fuzzy algorithm in system design, processed the output filter of the system controller, and added the changes in the rate of production line as a feedforward quantity to the controller output, to improve the tracking ability of the controller in the rate changes of the production line. Conclusion The computer simulation results showed that this self-adaptive PID controll method had good performance, which provides an effective control strategy for the nonlinear and time-lag system tension control in industrial processes.