PID控制器，参数调节是闭环的，还是开环的？

我在PID控制器，调节参数，显示找不到当前配置的稳定控制器，但是输入量在scape中曲线是收敛的？

[Maithili]

It's hard to say without looking at your model. There is a troubleshooting section at the end of this page which could be helpful to you: https://www.mathworks.com/help/slcontrol/automatic-pid-tuning.html