一种分离式变增量积分PID算法设计

Design of a separate variable increment integral PID algorithm

在工业进程中滞后系统是普遍存在的,现有的常规PID算法通常难以对其进行有效控制。针对滞后系统的时间延迟问题,设计了一种分离式变增量积分PID算法,以实现优化控制。基于对自动化设备玻璃热弯机温控器研发过程的详细分析设计该算法,以重点解决模型中被控温度由热量传递特性和产品结构性保温所带来的滞后问题。该文以传统PID为基本控制思想,建立完整的数学模型。在过程控制的不同阶段,通过比例、积分、微分分离和调整积分增量的方式实现了被控温度准确、稳定、迅速的同时响应,且具备较强的鲁棒性,将无扰动与有扰动温度震荡分别控制在1℃和10℃以内。

In the industrial process,time⁃delay system is common,and the existing conventional PID algorithm is usually difficult to control it effectively.In order to solve the problem of time delay in time⁃delay system,a separate variable increment integral PID algorithm is designed to realize optimal control.Based on the detailed analysis of the research and development process of the temperature controller of the automatic equipment glass hot bending machine,the algorithm is designed to solve the lag problem of the controlled temperature in the model caused by the heat transfer characteristics and the structural insulation of the product.Taking the traditional PID as the basic control idea,a complete mathematical model is established.In different stages of process control,through the separation of proportion,integral and differential and the adjustment of integral increment,the controlled temperature can respond accurately,stably and rapidly at the same time,and has strong robustness,the undisturbed and disturbed temperature oscillations are controlled within 1℃and 10℃respectively.