Vehicle Gearbox Noise and Vibration (PDF)

Advances in methods of gear design and the possibility of
predicting the sound pressure level and life time of gearboxes and
perfect instrumentation of test stands allows for the production of
a new generation of quiet transmission units. Current literature on
gearbox noise and vibration is usually focused on a particular
problem such as gearbox design without a detailed description of
measurement methods for noise and vibration testing.

Vehicle Gearbox Noise and Vibration: Measurement, Signal
Analysis, Signal Processing and Noise Reduction Measures
addresses this need and comprehensively covers the sources of noise
and vibration in gearboxes and describes various methods of signal
processing. It also covers gearing design, precision manufacturing,
measuring the gear train transmission error, noise test on testing
stands and also during vehicle pass-by tests.

The analysis tools for gearbox inspection are based on the
frequency and time domain methods, including envelope and average
toothmesh analysis. To keep the radiated noise under control, the
effect of load, the gear contact ratio and the tooth surface
modification on noise and vibration are illustrated by measurement
examples giving an idea how to reduce transmission noise.

Key features:

* Covers methods of processing noise and vibration signals

* Takes a practical approach to the subject and includes a case
study covering how to successfully reduce transmission noise

* Describes the procedure for the measurement and calculation of
the angular vibrations of gears during rotation

* Considers various signal processing methods including
order analysis, synchronous averaging, Vold-Kalman order tracking
filtration and measuring the angular vibration

Vehicle Gearbox Noise and Vibration: Measurement, Signal
Analysis, Signal Processing and Noise Reduction Measures is a
comprehensive reference for designers of gearing systems and test
engineers in the automotive industry and is also a useful source of
information for graduate students in automotive and noise
engineering.