渔业现代化2025，Vol.52Issue(5)：98-106,9.DOI:10.26958/j.cnki.1007-9580.2025.05.010
基于改进Smith模糊PID的循环水养殖系统溶氧控制研究
Research on dissolved oxygen control of recirculating aquaculture systems based on modified Smith fuzzy PID
摘要
Abstract
Dissolved oxygen,a crucial water quality factor in aquaculture,requires precise control.This study proposes a Modified Smith fuzzy PID controller to tackle the control challenges posed by the time-varying,nonlinear,and time-delay characteristics of dissolved oxygen control systems.By incorporating a fuzzy PID algorithm into a modified Smith predictor,this approach aims to mitigate the impact of model mismatch on dissolved oxygen control.Simulations were conducted under both matched and mismatched theoretical and actual model conditions.Results indicate that compared to conventional PID,fuzzy PID,and Smith fuzzy PID controllers,the modified Smith fuzzy PID controller exhibits significantly lower maximum overshoot(0.78％on average)and achieves target dissolved oxygen concentrations in the shortest time(approximately 371 seconds).Experimental validation in real dissolved oxygen control processes further confirms its superiority.The modified Smith fuzzy PID controller demonstrates the best control performance,with accuracy and robustness meeting the requirements for precise dissolved oxygen control in recirculating aquaculture systems.关键词
溶氧控制/循环水养殖/模糊PID/Smith预测器Key words
dissolved oxygen control/recirculating aquaculture/fuzzy PID/Smith predictor分类
水产学引用本文复制引用
刘浩宇,童成彪,熊宇,徐新明,胡浩宇..基于改进Smith模糊PID的循环水养殖系统溶氧控制研究[J].渔业现代化,2025,52(5):98-106,9.基金项目
湖南省自然科学基金(2024JJ5209) （2024JJ5209）
湖南省重点研发项目(2022NK2028) （2022NK2028）
