? _f ? 5 ? _max

Select the filter cutoff frequency ? _f, also referred to as the filter bandwidth, to be at least five times the maximum frequency of interest of model applicability ? _max

5

5.1

? _s ? 5 ? _f

Choose a sample rate ? _s, the same for all of the signals, with a value of at least a factor of 5 above the filter frequency ? _f

5

5.2

T _rec ? (4 to 5) T _max

For frequency sweeps, the minimum total record length T _rec relative to the length of the longest period T _max in a record

5

5.11

Lower limit of the coherence function to achieve acceptable accuracy in a frequency-response identification (In addition, the coherence function should not be oscillating.)

7

7.54

n _d ? 5

Minimum number of independent time-history averages n _d in a concatenated record

7

7.57

T _win = 2 T _max

Nominal window size T _win relative to the length of the longest period of interest T _max

7

7.60

T _win ? 0.5 T _rec

Maximum window size T _win relative to the length of the record T _rec

7

7.61

T _win ? (1/5) T _F

Maximum window size T _win relative to the concatenated record length T _F

7