A new frequency domain system identification method
Journal article, 2012
A new frequency domain system identification method based on a multi-frequency
input signal is proposed. Frequency contents of the oscillating signal are estimated using a
modified Kaczmarz algorithm proposed in this paper. Lyapunov stability analysis is performed
for this new Kaczmarz algorithm and transient bounds for estimation error are established.
Moreover, a new method for estimation of the variance of the measurement noise in
Kaczmarz algorithms is also described. A comparison of a transient performance of modified
Kaczmarz algorithm and a recursive least-squares algorithm is presented. The results are
applied to a frequency domain identification of a DC motor.