Vehicle Ride Vibration: Estimate Pitching, Bouncing & Rolling

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    Vehicle Vibration
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Estimating vehicle pitching, bouncing, and rolling natural frequencies requires a solid understanding of vehicle suspension fundamentals, including proper spring rates and shock dampers. Tire type and construction also significantly impact these dynamics. The discussion highlights a focus on frequency ranges of 0-10Hz for bouncing and pitching, and 0-3Hz for rolling. The ISO standard for rolling response measurement via steering wheel oscillation is noted as inadequate for the user's needs, as real-world conditions are essential for accurate data. The user seeks advice on assessing excitation frequency amplitude content under varying track conditions.
serbring
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Hi guys, I want to estimate vehicle pitching, bouncing and rolling natual frequencies. I am doubdful in the vehicle excitement. How can I understand if the excitation has a good frequency content?
 
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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)
 
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)

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.
 
Last edited:
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.

can anyone help me?
 
up!

bye
 

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