5.3.3 Frequency response for second-order systems
Consider a second-order system and the determination, from the
frequency response function, of the magnitude and phase of the steadystate
output when it is subject to a sinusoidal input. For example, we
might have a system which can be represented as an inductor, a capacitor
and a resistor all in series and consider the output p.d. across the
capacitor when there is a sinusoidal voltage input.
In general, a second-order system has a transfer function of the form: