Reduced Order Modelling of Linear Time Invariant Systems Using the Factor Division Method to Allow Retention of Dominant Modes

This paper proposes a new model order reduction method for the large-scale dynamic systems using the factor division approach to allow the preservation of dominant poles. For a given higher order model, the denominator of the lower order system is obtained by preserving the dominant poles of the original model, while the numerator is calculated by using the factor division algorithm. The proposed technique guarantees the preservation of stability, steady-state value, and initial few time moments of the original model in the reduced system. The simplicity, accuracy, and validation of the proposed technique are shown by the three standard examples taken from the literature.