Compensate for the displacement of an accelerometer measurement

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SUMMARY

The discussion centers on compensating for the displacement of an accelerometer measurement in a vehicle. The accelerometer is positioned 75 cm to the left of the center of gravity (CG), and the user seeks methods to correct the measured acceleration to reflect that at the CG. The formula provided for compensation includes terms for angular velocity and sensor position, specifically: a_p = a_{cg} + \dot{\omega}_B × r_s + \omega_B × (\omega_B × r_s) + 2ω_B. This highlights the importance of understanding dynamics in accurately measuring acceleration at a specific point.

PREREQUISITES
  • Basic understanding of vehicle dynamics
  • Familiarity with angular velocity concepts
  • Knowledge of accelerometer placement and its effects
  • Understanding of vector mathematics in physics
NEXT STEPS
  • Research "Dynamics of Accelerometers in Vehicles" for foundational knowledge
  • Study "Angular Velocity and Its Impact on Measurements" for deeper insights
  • Explore "Compensation Techniques for Sensor Displacement" for practical applications
  • Learn about "Vector Mathematics in Physics" to enhance calculation skills
USEFUL FOR

This discussion is beneficial for automotive engineers, sensor calibration specialists, and anyone involved in vehicle dynamics and measurement accuracy.

rabun
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Hello
I want to measure the lateral acceleration at the center of gravity of a vehicle. I cannot place the accelerometer here since I cannot mount it properly so I have placed it 75 cm to the left of the CG. The longitudinal and and vertical placement is approximately correct.

It there som way to compensate for the misplacement of the sensor? so that the acceleration measured and corrected it the one experienced at the CG?

Tips, hints, papers, links and so on are more than welcome

Thank you kindly for any and all help
 
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Basic dynamics sir:

a_p=a_{cg}+\dot{\omega}_B \times r_s + \omega_B \times \left(\omega_B \times r_s \right) + 2\omega_B

Where

a_p is the acceleration at the point in question
\omega_B is the angular velocity of the body
r_s is the position of the sensor in question

google dynamics for acceleration at a point for an explanation of each term
 
Thank you:) Some times it's just a matter of not knowing how to phrase your search. It helped, thanks.
 

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