Least-squares model order reduction enhancements

A simple algorithm for stable order reduction of z-domain Laguerre models

“…To illustrate the method two examples are presented. First, we have considered the seventh-order transfer function of a supersonic jet engine inlet [37][38] ( ) The value 24 . 0 = λ for the Laguerre parameter has been obtained using the suboptimal method described in [27,30].…”

“…Thus, using the presented method the following fifth-order reduced model has been derived for . Table 1 compares the quality of the impulse response of the proposed model (LG5) with those of models derived through Balanced Realization (BR5, see [39]), Weighted Impulse Response Gramian (WIRG5 see [36]) and Least-Squares with Scaling (LSS5, see [37]), Generalized Impulse…”