IEEE Transactions on Automatic Control, Vol.39, No.5, 1102-1105, 1994
The Discrete-Time Q-Markov Cover Models with Improved Low-Frequency Approximation
A new method of obtaining q-Markov Cover models for linear discrete systems based on singular perturbation technique is proposed. The reduced-order models obtained not only match initial Markov parameters and high-frequency power moments like conventional q-Markov Covers, but also match the initial time moments and low-frequency power moments of the original system.