摘要
当四容水箱系统包含非最小相位零点时,基于模型的控制策略的液位控制效果不理想,因此本文提出了更为实用的相平面分区法。它能直接根据当前的误差和误差变化率计算出与此相适应的控制量,不需要对系统建模,具有很强的抗干扰性,适合于对耦合系统进行控制;同时针对多容水箱的时滞问题,通过加入微分反馈,抑制了时滞引起的超调。仿真结果表明,该策略2个液位控制回路的累积误差比动态矩阵控制法分别减少11%和12%,比改进的解耦法分别减少20%和38%。
When quadruple tank system contains non-minimum phase zero, model-based strategies model fail to get ideal performance. So a more practical controller, phase-plane zone controller, is adopted in this paper. Its output is determined by the error and its rate of change. Independent of model, this controller has a strong anti-interference. So it is suitable for coupled system. Besides, differential feedback is added to suppress the overshoot caused by the time delay. Simulation shows that the accumulated error of the two level control loops is increased by 11% and 12 % respectively than the dynamic matrix control method and improved by more than 20 % and 38 % separately than the Novel Decoupling Method when this strategy is employed.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2012年第9期1115-1118,共4页
Computers and Applied Chemistry
基金
国家高技术研究发展计划(863)资助项目(2009AA05Z203)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
相平面分区控制
微分反馈
四容水箱
phase-plane zone control, differential feedback, quadruple-tank process
