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The output of my PID controller is coming very high...

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Kaushal Tiwari
Kaushal Tiwari 2017-9-26
评论： baosen zhao 2024-4-15
The output of my PID controller is coming as high as -10e15. What could be the possible reason and how to limit it????
Thanking you in advance...
  1 个评论
baosen zhao
baosen zhao 2024-4-15
我的想法是在实际的热工对象控制中，如果有很高的PID控制器输出，直接就切断PID的控制，此时相当于给系统一个负阶越响应，PID的控制器降至合理的区间就会继续打开PID的控制

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回答（2 个）

Christoph F.
Christoph F. 2017-9-26
编辑：Christoph F. 2017-9-26
Without more information, perhaps the simulink diagram, the question will be difficult to answer.
In general, PID controllers will produce high outputs if:
1) P coefficient > 0 and the input value is high
2) D coefficient > 0 and the input signal has steep slopes
3) I coefficient > 0 and the average control error does not approach zero over time; i.e. the integrator just keeps integrating up the error.
3) can be remedied by anti-integrator-windup measures (there are several approaches with different complexities and side effects. I believe the Simulink PID controller block does offer this as a built-in feature.
Kaushal Tiwari
Kaushal Tiwari 2017-9-27
Thank you for the answer... I would like to attach my Simulink file...

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