針對 pH 控制具有不確定性的大滯后的油田污水處理系統(tǒng)，基于傳統(tǒng)的Smith 預估器結(jié)構(gòu)，提出 一種改進方案。在Smith 預測控制的基礎上引入了模糊自整定方案，仿真和試驗結(jié)果表明，新的控制方案 不僅具有滿意的控制性能，而且具有較強魯棒性和抗干擾性能，對時變大滯后對象具有良好的控制效果。
[關鍵詞]：污水處理；pH控制；模糊控制；Smith預測控制
Abstract： An improved Smith-predictor based on the structure of traditional Smith-Predictor for the oil field waste water treatment pH control system with uncertainly and long dead time is presented. The scheme of fuzzy self-adjust based on the smith predict control is introduced. The simulation and experiment results show that this design is feasible and can provide higher characteristics to the controlled objects with time-varying parameters and long dead time.
Key words: Waste water treatment；pH control；Fuzzy control；Smith predict control