Detection of a fatigue crack in a rotor system using full-spectrum based estimation

作     者：Shravankumar, C. Tiwari, Rajiv 

作者机构：Indian Inst Technol Guwahati Dept Mech Engn Gauhati 781039 India 

出 版 物：《SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES》 (Sadhana)

年 卷 期：2016年第41卷第2期

页      面：239-251页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 

主　　题：Switching crack model-based identification full-spectrum fault parameter estimation switching crack forces 

摘      要：The force due to crack switching has multiple harmonic components of the spin speed. These components excite the rotor both in the same and reverse directions of the rotor spin. A full-spectrum method using complex Fast Fourier transform equations is developed to obtain force coefficients and displacement coefficients (forward and reverse). These coefficients are then used as an input to developed identification algorithms. Fault parameters identified are the additive stiffness due to crack, disc eccentricity due to unbalance, and system viscous damping. An extended algorithm estimates the crack forces. The algorithms are numerically tested.