采用大林控制器大纯滞后系统的数字仿真分析

Numerical Simulation Analysis for the Long Dead Time Systems with E. B. Dahlin's Controller

对于一个具有纯滞后的控制对象，用大林算法设计数字调节器，并且用这种数字调节器对系统的各种参数（采样周期Ｔ，闭环传递函数的时间常数Ｔｓ及被控制对象的时间常数Ｔｏ）取不同值时进行数字仿真。通过数字仿真的结果分析了这些参数变化时对控制系统的影响，结果表明，对于具有纯滞后的控制问题，当对象的数学模型已知时，采用大林算法设计的数字调节器可以获得较好的控制效果。最后，论述了在一定条件下，最少拍系统设计的数字调节器与大林算法设计的数字调节器之问的关系。

he digital controllers are designed with E.B.Dahlin's algorithm for the system withlong dead time. The digital simulation for different values of various parameters that include samplinginterval and time constant of closed-loop transfer function and of controlled object is made by thecontrollers. The effect on the control system in varying the value of the parameters has beenanalysed. The numerical simulation results demonstrate the controller designed by E.B.Dahlin'salgorithm have the better control performance when the controlled object is known. Finally. theinterrelation of Dahlin's algorithm and the dead beat control system is discussed.