Closed-loop/Open-loop transfer function

　・In Japanese
＜Premise knowledge＞
　・Transfer function
　・Transfer function synthesis

Describes how to shape the closed-loop transfer function into the form of the open-loop transfer function. It is used to determine whether the system including feedback is stable or not. As prerequisite knowledge, it is necessary to understand how to synthesize transfer functions.

■Closed-loop transfer function

An example of the transfer function of the feedback system is as follows.

■Open-loop transfer function

Explain the open-loop transfer function when the closed loop is cut.



In the above case, the form is the same as a simple open-loop transfer function, but you can see that the form is different when the closed-loop transfer function is changed to the open-loop transfer function as shown below.

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