TY - JFULL AU - B. X. Tchomeni and A. A. Alugongo and L. M. Masu PY - 2015/12/ TI - A Fault Analysis Cracked-Rotor-to-Stator Rub and Unbalance by Vibration Analysis Technique T2 - International Journal of Mechanical and Mechatronics Engineering SP - 1882 EP - 1892 VL - 9 SN - 1307-6892 UR - https://publications.waset.org/pdf/10002623 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 107, 2015 N2 - An analytical 4-DOF nonlinear model of a de Laval rotor-stator system based on Energy Principles has been used theoretically and experimentally to investigate fault symptoms in a rotating system. The faults, namely rotor-stator-rub, crack and unbalance are modeled as excitations on the rotor shaft. Mayes steering function is used to simulate the breathing behaviour of the crack. The fault analysis technique is based on waveform signal, orbits and Fast Fourier Transform (FFT) derived from simulated and real measured signals. Simulated and experimental results manifest considerable mutual resemblance of elliptic-shaped orbits and FFT for a same range of test data. ER -