Determining heavy vehicle suspension health from vibratory wheel loads
Davis, Lloyd E. & Bunker, Jonathan M. (2009) Determining heavy vehicle suspension health from vibratory wheel loads. In Proceedings of 3rd Smart Systems Student Conference, Owen J Wordsworth Room, Queensland University of Technology, Gardens Point, Brisbane.
A low-cost test bed was made from a modified heavy vehicle (HV) brake tester. By rotating a test HV’s wheel on an eccentric roller, a known vibration was imparted to the wheel under test. A control case for dampers in good condition was compared with two test cases of ineffective shock absorbers. Measurement of the forces at the bearings of the roller provided an indication of the HV wheel-forces. Where the level of serviceability of the shock absorbers varied, differences in wheel load provided a quality indicator corresponding to a change of damper characteristic. Conclusions regarding the levels of damper maintenance beyond which HV suspensions cause road damage and dynamic wheel forces at the threshold of tyre wear at which HV shock absorbers are normally replaced are presented.
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