基于模糊自整定PID和Smith预估相结合的分子蒸馏真空度控制

Vacuum degree control of molecular distillation based on fuzzy self-tuning PID and Smith prediction

由分子蒸馏动态过程特性以及对蒸馏真空度的要求,将真空度视为纯滞后温度控制对象,将模糊自整定PID与Smith预估相结合,实现了PID参数的自调节,解决了分子蒸馏真空度控制系统中的"非线性"和"时滞"问题。

Considering the dynamic process of molecular distillation and the required distillation vacuum degree,we take the vacuum parameter as a time-delay control object and combine the fuzzy self-tuning PID with Smith estimation to realize the self-adjustment of PID parameters and solve the problems such as nonlinearity and time-lag.