針對熱工過程中的存在的滯后環節，本文提出一種結合模糊和PID 的前饋——反饋
預估控制方法,該前饋預估補償與系統的純滯后時間無關，特別適合于因為缺少滯后時間信息導致的無法運用大林算法和smith 預估器的情況。實驗結果表明該控制方法能有效抑制滯后的不利影響，具有一定的魯棒性和較高的控制精度。
關鍵詞：滯后；前饋補償；預估控制；復合控制
Abstract: As for the delay widely exists in most thermal systems，this paper presents a new
method, which applies the theory of feedforward-feedback predictive controller with fuzzy and
PID. The method has nothing to do with the time delay and especially fit in the situation in witch Dalin algorithm and Smith prediction control can’t be used because of lack of information of time delay. Experiment results show that the method can effectively restrain the adverse influence from delay, and has a certain robusticity and high precision.
Keywords: Time delay; Feedforward compensator; Predictive control; Compound control