基于滑模变结构的发动机转速控制系统

摘要

针对工业中传统的发动机 PID 转速控制系统存在其经常性参数整定不良，运行工况适应性差，且很难同时很好地满足稳态精度、动态稳定性、平稳性和快速性的要求等问题，提出一种基于比例切换函数的滑模变结构发动机转速控制系统。进而介绍了发动机转速控制数学模型，并通过 MatIab / SimuIink 仿真与传统的 PID 转速控制方法进行对比，验证滑模变结构控制在发动机这种高阶非线性多变量系统中具有响应速度快，超调量小和控制精度高等优点。%Based on the probIems traditionaI engine speed controI system with PID existing adverse parameter setting,poor adapt-abiIity,and it is very difficuIt for a smooth and fast to meet the steady state accuracy,good dynamic stabiIity at the same time,so a variabIe structure sIiding mode switching function of engine speed ratio controI system is proposed by this paper, and the engine speed controI mathematicaI modeI is introduced,compared with traditionaI MatIab / SimuIink simuIation of the PID speed controI,verification of sIiding mode variabIe structure controI in the engine of this kind of high order nonIinear muItivariabIe system has fast response,smaI overshoot and high controI precision.