Abstract
SUMMARYThis paper describes research undertaken to study the performance of automotive dampers at frequencies up to about 130 Hz, and to evaluate the accuracy of an existing nonlinear mathematical model. The high frequency force-velocity behaviour of a monotube damper was measured and a comparison was made with the simulated damper forces. The wavelet transform was used for data analysis in addition to traditional techniques. The analysis indicated that low velocity behaviour and valve opening characteristics are of primary importance in determining high frequency harmonic force generation. The simulations showed good agreement with measured data at low frequencies. However, errors of more than 15% were found for frequencies above 4 Hz.
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