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基于模糊免疫PID算法的烘缸冷凝水排放差压控制
Control Method and Its Application of Differential Pressure of Dryer Condensate Discharge of Paper Machine Based on Fuzzy Immune PID Algorithm
收稿日期：  
DOI：10.11980/j.issn.0254-508X.2018.10.010
关键词:  烘缸冷凝水排放差压  免疫反馈机理  模糊控制
Key Words:differential pressure of dryer condensate discharge  immune feedback mechanism  fuzzy control
基金项目:陕西省重点科技创新团队计划项目（项目编号：2014KCT-15）；陕西省科技统筹创新工程计划项目（2016KTCQ01-35）。
作者单位
汤　伟1 1.陕西科技大学电气与信息工程学院，陕西西安，710021 
王　帅1，* 1.陕西科技大学电气与信息工程学院，陕西西安，710021 
佟永亮1 1.陕西科技大学电气与信息工程学院，陕西西安，710021 
孙小乐2 2.陕西科技大学机电工程学院，陕西西安，710021 
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摘要:纸机烘缸冷凝水排放差压控制对降低造纸能耗及提高成纸质量具有重要的意义。针对常规PID控制不符合烘缸排水自然规律、模糊PID算法自适应能力有限的缺点，提出一种模糊免疫PID算法应用于烘缸冷凝水排放差压控制。本课题介绍了模糊免疫PID算法原理，并使用MATLAB的.m程序对该算法进行仿真模拟。仿真结果表明，基于模糊免疫PID算法的系统无超调量，调整时间为46.5 s；当加入阶跃扰动时，其超调量为7.46%，波动时间为30 s；当模型失配时，其超调量为2.9%，调整时间为48 s；当模型失配并加入阶跃扰动时，其超调量为7.6%，波动时间为39 s。另外，实际应用结果表明，使用模糊免疫PID算法的烘缸冷凝水排放差压被控制在工艺允许范围30～50 kPa，吨纸蒸汽消耗量下降了约9.09%，且烘缸处于不积水状态。
Abstract:Differential pressure control of dryer condensate discharge is of great significance for reducing energy consumption of the drying section and improving the quality of the paper. Aiming at drawbacks that PID control does not meet the natural law of dryer draining off water and fuzzy PID control has a certain adaptation limit， fuzzy immune PID control algorithm was applied to control differential pressure of dryer condensate discharge.Principle of fuzzy immune PID algorithm and design method of controller were introduced.Simulations were carried based on.m program in MATLAB.The simulation results showed that the control system under fuzzy immune PID algorithm had no overshoot and the adjustment time was 46.5 s.When interference was added， the overshoot was 7.46% and the fluctuation time was 30 s.When model mismatched， the overshoot was 2.8% and the adjustment time was 48 s.When model mismatched and interference added， the overshoot was 7.6% and the fluctuation time was 39 s.Application result showed that the differential pressure of dryer condensate discharge was controlled within the allowable range of the process 30～50 kPa， consumption of steam per ton of paper decreased by 9.09%， and the dryer was in a state without accumulated water．
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