Brief paper: Least squares based iterative identification for a class of multirate systems

Authors:
Xinggao Liu;Jing Lu
Affiliations:
Faculty of Information Technology, Zhejiang University, Hangzhou, 310027, PR China;School of Communication and Control Engineering, Jiangnan University, Wuxi, 214122, PR China
Venue:
Automatica (Journal of IFAC)
Year:
2010

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Abstract

This paper studies modeling and identification problems for multi-input multirate systems with colored noises. The state-space models are derived for the systems with different input updating periods and furthermore the corresponding transfer functions are obtained. To solve the difficulty of identification models with unmeasurable noises terms, the least squares based iterative algorithm is presented by replacing the unmeasurable variables with their iterative estimates. Finally, the simulation results indicate that the proposed iterative algorithm has advantages over the recursive algorithms.