基于极限环法的PID快速自整定的一种实现

A realization of PID fast auto - tuning basedon limit-cycle method

探讨了基于极限环法的ＰＩＤ在线快速自整定理论和实现问题．提出采用满度－零度继电特性生成极限环，并应用自振荡自适应系统理论和离散Ｆｏｕｒｉｅｒ级数变换滤波算法进行临界参数估计，还引入自适应预调点概念处理自整定的安全性问题．

The theory and the realization of on-line PID fast auto-tuning based on limit-cyclemethod are studied in the paper. ON - OFF relay control is used to generate limit-cycleand Self-Oscillating Adaptive System theory and Discrete Fourier Thansformation Filteralgorithm are applied to estimate critical parameters. The concept of adaptive test point isintroduced to deal with the safety in operation as well.