1. In the cut-off frequency calculation formula, when the modulus of G(jw)H(jw) is equal to 1, wc is w..

2.wc refers to the open-loop cutoff frequency, also known as the shear frequency.

3. It is the frequency at which the amplitude-frequency characteristic curve intersects the 0dB line in the open-loop amplitude-frequency characteristic, so it is recorded as wc.

4. It is a very important performance parameter, and its specific solution is rarely involved in general automatic control textbooks.

5. We can get wc by solving equation |G(jWc)H(jWc)|= 1.

The formula for calculating the cutoff frequency of wc is: F= 1/(2*Pi*R*C). Cut-off frequency refers to the boundary frequency (generally -3dB as the boundary) at which the output signal energy of the system begins to drop sharply or rise sharply in the band-stop filter.

A formula is a formula that uses mathematical symbols to express a certain relationship (such as a law or theorem) between various quantities. It is universal and applicable to all similar problems. In mathematical logic, a formula is a formal grammatical object to express a proposition, but the proposition may depend on the free variable value of the formula.

In the cut-off frequency calculation formula, when the modulus of G(jw)H(jw) is equal to 1, wc is w. Wc refers to the open-loop cutoff frequency, also known as the shear frequency. It is the frequency at which the amplitude-frequency characteristic curve intersects the 0dB line in the open-loop amplitude-frequency characteristic, so it is recorded as wc. It is a very important performance parameter, and its specific solution is rarely involved in general automatic control textbooks. We can get wc by solving the equation |G(jWc)H(jWc)|= 1