delayest
Estimate time delay (dead time) from data
Syntax
nk = delayest(Data)
nk = delayest(Data,na,nb,nkmin,nkmax,maxtest)
Description
nk = delayest(Data)
estimates time delay
from data. Data
is an iddata
object
containing the input-output data. It can also be an idfrd
object
defining frequency-response data. Only single-output data can be handled. nk
is
returned as an integer or a row vector of integers, containing the
estimated time delay in samples from the input(s) to the output in Data
.
The estimate is based on a comparison of ARX models with different delays:
nk = delayest(Data,na,nb,nkmin,nkmax,maxtest)
specifies
additional options. The integer na
is the order
of the A polynomial (default 2). nb
is a row vector
of length equal to the number of inputs, containing the order(s) of
the B polynomial(s) (default all 2). nkmin
and nkmax
are
row vectors of the same length as the number of inputs, containing
the smallest and largest delays to be tested. Defaults are nkmin = 0
and nkmax = nkmin+20
.
If nb
, nkmax
, and/or nkmin
are
entered as scalars in the multiple-input case, all inputs will be
assigned the same values. maxtest
is the largest
number of tests allowed (default 10,000).
Version History
Introduced before R2006a