改进型Fuzzy—Smith控制在再热器中的应用

Application of Improved Fuzzy-Smith Control in Reheater

针对再热器温度控制系统具有不确定性,大迟延和大惯性等特点,基于Smith预估器结构,提出一种改进方案。在Smith预测控制的基础上引入了模糊自整定方案,仿真和试验结果表明,新的控制方案不仅具有满意的控制性能,而且具有较强鲁棒性和抗干扰性能,对时变大滞后对象具有良好的控制效果。

An improved Smith -- predictor based on the structure of traditional Smith -- Predictor for reheater temperature control system in thermal power plants with uncertainly , large delay time and large inertia 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.