Full definition
Predictive maintenance technique measuring and analyzing vibration frequencies and amplitudes in rotating equipment to detect incipient faults: unbalance (1× RPM), misalignment (1× and 2× RPM), bearing defects (BPFO, BPFI, BSF frequencies), mechanical looseness (harmonics of 1× RPM), and gear problems (GMF). Instruments: FFT analyzers, piezoelectric accelerometers. Standard: ISO 10816.