The Critical Damping component models an order filter with critical damping characteristics and a cut-off frequency . It is implemented as a series of first-order filters.
This filter type is especially useful to filter the input of an inverse model because the filter does not introduce any transients.
If the normalized parameter is (the default), the filter is normalized such that the amplitude of the filter transfer function at the cut-off frequency is 3dB. Otherwise, the filter is not normalized, that is, it is unmodified. A normalized filter is usually much better for applications because filters of different orders are comparable, whereas non-normalized filters usually require the cut-off frequency to change when the order of the filter is changed.
Figures of the filter step responses are shown below.