Lateral car velocity in a corner

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SUMMARY

The discussion centers on calculating the lateral velocity of a car while changing lanes, given a known longitudinal speed, yaw rate, and steering angle, without requiring cornering stiffness. Participants clarify that lateral velocity is not zero during lane changes, and the question revolves around whether it is feasible to compute this lateral velocity at the center of gravity (CG) under these conditions. The consensus indicates that it is indeed possible to derive the lateral velocity using the provided parameters.

PREREQUISITES
  • Understanding of vehicle dynamics and motion principles
  • Knowledge of yaw rate and its impact on vehicle motion
  • Familiarity with steering angles and their relation to lateral movement
  • Basic concepts of lateral and longitudinal velocity in automotive contexts
NEXT STEPS
  • Research the mathematical models for calculating lateral velocity in vehicles
  • Explore the relationship between yaw rate and lateral acceleration
  • Study vehicle dynamics simulations using tools like MATLAB or Simulink
  • Investigate the effects of tire characteristics on cornering behavior
USEFUL FOR

Automotive engineers, vehicle dynamics researchers, and anyone involved in performance vehicle analysis will benefit from this discussion.

rabun
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Hello

The problem is a car going around a corner. The car is moving at a known but changing longitudal speed, the yawrate and steering angle is known as well.
Is it possible to calculate the lateral velocity of the car without knowing the cornering stiffness?(road/tire friction coefficient)

Thank for your help
 
Last edited:
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hello rabun! :smile:

i don't understand the question :redface: …

surely the lateral velocity is zero? :confused:​
 
Hello tiny tim

No, I do don't think that it should be zero, though I might restate the question differently.

In stead of a corner, since this might suggest constant angular velocity, picture a car changeing lanes on the highway. This would entail the forward velocity being somewhat constant.
If I could measure the Yawrate and the angle of the front wheels of the car as well as the forward velocity would it be possible to calculate the lateral velocity at CG without cornering stiffness as the car changes lanes. Can it be done?

Does this make my problem clearer? or am I further confusing everyone?

Rabun
 

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