Answer:
Analysis of vibration signals
Adam Biernat, in Vibration Control and Actuation of Large-Scale Systems, 2020
Adam Biernat, in Vibration Control and Actuation of Large-Scale Systems, 20204.1.2 Analysis of vibration acceleration of the housing of a 3-phase synchronous motor with p = 2 salient pole pairs
Adam Biernat, in Vibration Control and Actuation of Large-Scale Systems, 20204.1.2 Analysis of vibration acceleration of the housing of a 3-phase synchronous motor with p = 2 salient pole pairsAs bearing wear develops, local raceway defects increase, resulting in vibration also in the lower-frequency range.
Adam Biernat, in Vibration Control and Actuation of Large-Scale Systems, 20204.1.2 Analysis of vibration acceleration of the housing of a 3-phase synchronous motor with p = 2 salient pole pairsAs bearing wear develops, local raceway defects increase, resulting in vibration also in the lower-frequency range.Frequency components outside the dominant resonance area appear due to defects in the inner race of the bearing (Fig. 1.12). In the upper part of the F-F image created for fP = fi, there are stochastic and deterministic frequency components, the last ones being side bands of higher harmonics of the frequency fi, distant by rotational frequency fr, (Fig. 1.13). Higher harmonics of the process frequency fi also appear in the low-frequency range (combination of Patterns 6b and 1). The side bands are visible in the distribution of the average amplitude of the vibration acceleration Ams (Fig. 1.14). Only selected side bands distant by rotational frequency fr are marked.
Adam Biernat, in Vibration Control and Actuation of Large-Scale Systems, 20204.1.2 Analysis of vibration acceleration of the housing of a 3-phase synchronous motor with p = 2 salient pole pairsAs bearing wear develops, local raceway defects increase, resulting in vibration also in the lower-frequency range.Frequency components outside the dominant resonance area appear due to defects in the inner race of the bearing (Fig. 1.12). In the upper part of the F-F image created for fP = fi, there are stochastic and deterministic frequency components, the last ones being side bands of higher harmonics of the frequency fi, distant by rotational frequency fr, (Fig. 1.13). Higher harmonics of the process frequency fi also appear in the low-frequency range (combination of Patterns 6b and 1). The side bands are visible in the distribution of the average amplitude of the vibration acceleration Ams (Fig. 1.14). Only selected side bands distant by rotational frequency fr are marked.Fig. 1.12
