中文摘要：

针对过程控制普遍存在的大时滞、大惯性对象,设计并仿真了一种新型非线性PI控制器.该控制器的前置非周期采样单元补偿被控对象的时滞特性,非线性PI控制环节加快调节过程并减少超调量,MATLAB的S-Function实现了非周期采样和非线性环节的仿真.仿真结果表明,该新型非线性PI控制器具有较小的超调量、较短的过渡时间,在模型失配的情况下仍具有良好的控制性和鲁棒性.

英文摘要：

For the problem of large time-delay and great inertia in the process control field,a new nonlinear PI controller is proposed which can compensate the time-delay features by an aperiodic sampling unit,speed up the adjustment process and reduce the overshoot by a nonlinear PI controller.The simulation of the aperiodic sampling unit and nonlinear unit is realized by the S-Function of MATLAB.Simulation results demonstrate that the new nonlinear PI controller has less overshoot and faster response.In the case of the model-process mismatch,it also has a good performance and robust stability.