Motorcycle Lean Angle Calculation

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SUMMARY

The discussion focuses on calculating the motorcycle lean angle using various inputs such as front and rear wheel speed, three-axis G-forces from a sensor near the center of gravity (COG), and gyroscopic data. It highlights the limitations of simple gyro integration due to drift and emphasizes the need to incorporate road slope angle for accurate calculations. Key factors in this calculation include barycenter, radius, and speed, along with a force diagram that accounts for gravitational, frictional, centrifugal, and centripetal forces.

PREREQUISITES
  • Understanding of motorcycle dynamics and physics
  • Familiarity with sensor data interpretation, specifically three-axis accelerometers and gyroscopes
  • Knowledge of force diagrams and the forces acting on a motorcycle
  • Basic skills in mathematical modeling and calculations related to angles and forces
NEXT STEPS
  • Research methods for compensating gyro drift in angular measurements
  • Study the impact of road slope on motorcycle stability and lean angle
  • Explore the use of force diagrams in dynamic systems analysis
  • Learn about advanced sensor fusion techniques for improved angle calculations
USEFUL FOR

Motorcycle engineers, physics enthusiasts, data analysts in automotive fields, and anyone involved in motorcycle performance optimization.

motecben
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I would like to calculate motorcycle lean angle. I have various inputs available including front and rear wheel speed, 3 axis of G form a sensor fixed near the COG of the bike, gyro in 3 planes. The gyro drifts as all gyros do so a simple integration of the gyro rate of change is unsatisfactory. A second interesting additional calculation would be to include the road slope angle in the equation so that the angle of the bike is directly in relation to the slope of the road. Any help would be greatly appreciated.
 
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You need the barycenter, radius and speed. Then draw a force diagram with gravitational, possibly frictional, centrifugal, and centripetal force. The angle basically lowers the barycenter and changes friction.
 

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