Slow and fast modes decomposition
[G1,G2] = slowfast(G,ns)
slowfast computes the slow
and fast modes decompositions of a system G(s)
G(s) = [G1(s)] + [G2(s)]
G(s) contains the
modes (modes with the smallest absolute value) of
denotes the slow part of G(s). The slow poles have low frequency and magnitude values.
denotes the fast part. The fast poles have high frequency and magnitude values.
ns denotes the index where the
modes will be split.
freqsep to separate
slow and fast modes at a specified cutoff frequency instead of a specified
number of modes.
M.G. Safonov, E.A. Jonckheere, M. Verma and D.J.N. Limebeer, “Synthesis of Positive Real Multivariable Feedback Systems”, Int. J. Control, vol. 45, no. 3, pp. 817-842, 1987.