G(s)H(s) = T(s) is called the open-loop transfer function. The magnitude of T(s) is the open-loop gain, sometimes called the loop gain, and T θ (s) is the phase of the open-loop gain or simply the ...

Once the open-loop transfer function is modeled, it’s necessary to design the frequency compensator such that it achieves the best performance possible. Because the frequency response of the above ...