Texp is the experiment duration that you specify with your configuration of the start/stop
signal (See the start/stop port description on the block reference page for more
information). For the estimation computation, the block uses only the data collected in a
window of NlongestP. Here, P is the period of the slowest frequency in the frequency vector
ω, and Nlongest is the value of the Number of periods of the lowest frequency used for
estimation block parameter. Any cycles before this window are discarded. Thus, the
settling time Tsettle = Texp – NlongestP. If you know that your system settles quickly, you can
shorten Texp without changing Nlongest to effectively shorten Tsettle. If your system is noisy,
you can increase Nlongest to get more averaging in the data-collection window. Either way,
always choose Texp long enough for sufficient settling and sufficient data-collection. The
recommended Texp = 2NlongestP.Algorithms
Sinestream Mode
When Experiment mode is Sinestream, the block uses a correlation analysis method. In
this method, the measured plant output y(t) is mixed with a sine signal and a cosine signal
at the test frequency ω. The resulting signal is then integrated and averaged for a time T16 Blocks — Alphabetical List