Eigensystem Realization Algorithm

This function returns the state-space model from IRF by using ERA

[A,B,C,D]=era(h,n,N,Ts,def);

This function returns the state-space model (A,B,C,D) in continuous or discrete time. The input parameters are the discrete-time impulse response function (IRF); the order of the system; the number of samples to assembly the Hankel matrix and the sample time.

References:
Juang, J. N. and Phan, M. Q. "Identification and Control of Mechanical Systems", Cambridge University Press, 2001.