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Determining rigid body motion from only accelerometer data

New Publication from the Kesari group at Brown University!

Title: Determining rigid body motion from accelerometer data through the square-root of a negative semi-definite tensor, with applications in mild traumatic brain injury

Journal: Computer Methods in Applied Mechanics and Engineering


  • Algorithm predicts a rigid body’s motion using only four tri-axial accelerometers.

  • The body’s rotational motion is obtained without time integrating its acceleration.

  • Algorithm provides the complete kinematics of rigid body motion in the lab frame.

  • 4 tri-axial accelerometers can be in any orientation and any non-coplanar position.

  • Algorithm will facilitate use of finite element method based brain injury criteria.



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