Output details

Experimental identification of shock absorber knocking noise using various input waveforms

The introduction of quieter power trains (hybrid power trains and electric drives) could make secondary noise sources dominant. Shock absorber transient noise has been a challenging vehicle noise and vibration concern which makes up a significant part of the component warranty claims of over a billion pounds. In collaboration with SPAX, a novel quality control test was developed to identify knocking noise as an alternative to current methods used in industry. The approach was validated by successfully identifying “noisy” shock absorbers from a mix of production line and field-returned products. The method helped modify the design of a particular model.