Hava Taşıt Modeli İçin Belirlenen Bant Genişliğinde Model İndirgeme Tekniklerinin Karşılaştırılması

Abstract

This paper presents a comparison of two popular model reduction techniques on an aircraft model. Large scale model of the aircraft is obtained via Ground Vibration Test (GVT). In vibration-based applications, natural frequencies are important, designers aim to focus on especially these frequencies. Therefore, a reduced-order model should be obtained adequately by approximating the original system at interested frequencies. To perform this, two popular model reduction methods; Frequency Weighted Balanced Model Reduction (FWBMR) and Rational Krylov based model reduction methods are resorted in this paper. The effectiveness of these two methods is discussed, and specifically, the flexibility of Rational Krylov based method is demonstrated on Body freedom flutter aircraft model.