Channel-specific Frequency-limited Model Reduction

The frequency-limited model reduction techniques aim to construct a model of significantly lower order which approximates the original higher order model accurately within some specified frequency interval. In this paper, we propose a frequency-limited model reduction technique for multi-input and multi-output systems wherein a different desired frequency region can be specified for each input-output channel. The reduced order model thus obtained ensures superior accuracy within the frequency regions specified for each input-output channel. A numerical example is presented to demonstrate the applicability and the efficacy of the proposed algorithm.