【摘要】 利用MATLAB软件对一阶惯性延时系统免分析建模.通过对实际被控对象施加阶跃激励可获得实际系统的阶跃响应数据,利用MATLAB软件的“fminsearch”命令可方便地求得与实际数据有最小均方差的响应曲线数学表达式,通过变换运算得到被控对象的传递函数Gp(Z).根据大林(Dahlin)控制算法理论,先设定期望的闭环系统函数Φ(Z),由此二函数便可得到控制器的函数Gc(Z).利用MATLAB中的SIMULINK工具建立仿真模型,通过对此模型的仿真运行,便可得到控制器的最佳参数.更多还原

【Abstract】 This article introduces a simple and precise way to establish a first-order inertia delay system’s simulation model without quantitative analysis.We can get the data of step response of the system by applying a step stimulate signal to the system and sampling its response.Then we use MATLAB software to get a mathematic expression which has least mean square deviation to original data and further to derive system’s Z function Gp(Z).According to Dahlin control algorithm,we can determine a expecting close loop system function Φ(Z) and then the controller function Gc(Z) can derive from them.Using SIMULINK tool the simulation model is easy established for these function.After runing the simulation,we can get the best parameters of the controller.更多还原