摘要
针对少烘缸或单烘缸纸机的干燥过程具有滞后大、惯性大且非线性的缺点,提出专家PID结合Smith预估器的算法,设计了少烘缸纸机或单烘缸纸机的烘缸温度和蒸汽流量串级控制系统。主控制器是改进的专家PID控制器,利用基于专家经验的知识库在线调整PID参数;对主回路采用改进型Smith预估器,以克服纯滞后对系统稳定性的影响,也解决了Smith预估器对数学模型精确要求的问题。利用MATLAB进行仿真,结果表明:改进型Smith-专家PID算法具有良好的控制品质,具有超调小及响应速度快等动态特性。
Considering large delay and inertia and nonlinearity of drying process which has less or single dryers in papermaking industry,the Smith-expert PID algorithm was proposed and the cascade control system for both dryer temperature and steam pressure was designed. The main controller is an expert PID controller which adopts expert advice-based knowledge base to adjust PID parameters; and the main loop employs an improved Smith predictor which can remove dead time influence from the system stability and satisfy Smith predictor for an accurate mathematical model. Simulation result shows that the improved Smith-expert PID control has good quality like small overshoot and fast response.
出处
《化工自动化及仪表》
CAS
2016年第2期128-133,共6页
Control and Instruments in Chemical Industry
基金
江苏省制浆造纸科学与技术重点实验室开放基金资助项目(201010)
