Feature extraction method based on NOFRFs and its application in faulty rotor system with slight misalignment

• Published in: Nonlinear dynamics Vol. 99; no. 2; pp. 1763 - 1777
• Main Authors: Liu, Yang, Zhao, Yulai, Li, Jintao, Lu, Huanhuan, Ma, Hui
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.01.2020; Springer Nature B.V
• Subjects: Automotive Engineering; Classical Mechanics; Computer simulation; Control; Dynamical Systems; Engineering; Fault detection; Fault diagnosis; Feature extraction; Frequency response functions; Higher harmonics; Mechanical Engineering; Military helicopters; Misalignment; Nonlinear response; Review; Structural damage; Vibration; Feature extraction; Weak feature enhancement; Variable weighted; NOFRFs; Slight misalignment

Fault features extraction method for slight misalignment of rotor systems is researched in this paper. When a rotor system with faults is excited by harmonic inputs, system response will contain higher harmonic components. Phenomenon of these higher harmonics implies the presence of nonlinear featur...