TY - JFULL AU - Muhammad F. Yaqub and Iqbal Gondal and Joarder Kamruzzaman PY - 2011/12/ TI - Multiple-Points Fault Signature's Dynamics Modeling for Bearing Defect Frequencies T2 - International Journal of Mechanical and Mechatronics Engineering SP - 2540 EP - 2546 VL - 5 SN - 1307-6892 UR - https://publications.waset.org/pdf/15172 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 59, 2011 N2 - Occurrence of a multiple-points fault in machine operations could result in exhibiting complex fault signatures, which could result in lowering fault diagnosis accuracy. In this study, a multiple-points defect model (MPDM) is proposed which can simulate fault signature-s dynamics for n-points bearing faults. Furthermore, this study identifies that in case of multiple-points fault in the rotary machine, the location of the dominant component of defect frequency shifts depending upon the relative location of the fault points which could mislead the fault diagnostic model to inaccurate detections. Analytical and experimental results are presented to characterize and validate the variation in the dominant component of defect frequency. Based on envelop detection analysis, a modification is recommended in the existing fault diagnostic models to consider the multiples of defect frequency rather than only considering the frequency spectrum at the defect frequency in order to incorporate the impact of multiple points fault. ER -