Temperature feedforward control method based on PLC and application thereof

The invention relates to automatic control, in particular to a PLC (programmable logic controller)-based temperature feedforward control method and application thereof, and the method comprises the steps of setting target temperature and return difference, sampling temperature, performing FIFO (first in first out) processing, judging whether data in the later sequence are greater than or equal to data in the front sequence, performing cooling adjustment, and performing heating adjustment. Compared with the prior art, the method is suitable for a pure lag and large inertia system, the automatic control error can be reduced, meanwhile, the temperature trend can be obtained, the temperature can be adjusted in advance, it is guaranteed that the temperature is within a reasonable range, and high efficiency and accuracy of the temperature control technology are achieved. 本发明涉及自动控制，具体是一种基于PLC的温度前馈控制方法及其应用，该方法，包括设定目标温度和回差，温度采样，FIFO处理，判断顺序在后的数据是否都大于等于顺序在前的数据，进行降温调节，进行升温调节，判断客体温度是否等于目标温度与回差之和等7个步骤，与现有技术相比，本发明适用于纯滞后、大惯量