The discussion revolves around estimating the natural frequencies of vehicle pitching, bouncing, and rolling. Participants explore the factors influencing vehicle excitation and the challenges of measuring frequency content under real-world conditions.
Participants do not reach a consensus, as there are multiple competing views on how to approach the estimation of vehicle frequencies and the challenges associated with excitation measurement.
Limitations include the dependence on specific vehicle characteristics, the variability of road conditions, and the unresolved nature of the excitation frequency content assessment.
Individuals interested in vehicle dynamics, suspension design, and experimental methods for measuring vehicle responses may find this discussion relevant.
Ranger Mike said:tuff question..you have to understand the basics of the vehicle suspension before you can
1. determine proper spring rate
2. proper shock ( dampers)
also
what type tire? tire construction..radial . bias ply, material ??
i suggest you read race car suspension post i did earlier on this forum
you have to look at track surface ( road conditions)
serbring said:I have studied the problem, I am interested to frequency from 0 to 10Hz at maximun for bouncing and pitching, while for rolling from 0 to 3Hz. I have read there is a ISO's standard for estimating the vehicle frequency rolling responce, through the application of a steering wheel oscillation, but it isn't good for me because I have to measure also other accelerations and they has a good meanings only during real vehicle traveling condition. I have thougth to pass on a rough track at different speeds, but my doubt is to understand if the excitation frequency amplitude content is good enough since I can't control precisely the excitation. I hope to have explained better my problem.