如图增量式simulink仿真，按照上面的参数能出图，倒是我换一个传递函数就不对了（PID无误，该如何改？

Question

Warning: 'zlsfangzhen/Unit Delay' is discrete, yet is inheriting a continuous sample time; consider
replacing unit delay with a memory block. When a unit delay block inherits continuous sample time, its
behavior is the same as the memory block. Unit delay block's time delay will not be fixed and could
change with each time step. This might be unexpected behavior. Normally, a unit delay block uses
discrete sample time. You can disable this diagnostic by setting the 'Discrete used as continuous'
diagnostic to 'none' in the Sample Time group on the Diagnostics pane of the Configuration Parameters
dialog box.
Warning: Using a default value of 0.06 for maximum step size. The simulation step size will be equal
to or less than this value. You can disable this diagnostic by setting 'Automatic solver parameter
selection' diagnostic to 'none' in the Diagnostics page of the configuration parameters dialog

Answer 1

【按照上面的参数能出图，倒是我换一个传递函数就不对了】到底换成什么样的传递函数，又怎样不对了，希望题主描述的清楚一些。

另，建议题主最好把模型文件传到网盘上（包括现有的和改成传递函数之后的），以便于查找问题分析原因。

Answer 2

楼主是在用先进PID控制MATLAB仿真吗？