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Kiwii Project

This project explores the importance of joints and the role of vision and proprioception in balancing. Using KINECT and Wii data, the study analyzes the center of mass and center of pressure, and investigates the impact of eyes closed vs eyes open conditions. The results of this study provide insights into the factors affecting balance.

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Kiwii Project

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  1. Kiwii Project Kahori Kita Yoshiyuki Sato John Rocamora Frank Schumann Scott Yang

  2. Motivation • Which joints are more important for balancing? • Is vision or proprioception more important for balancing?

  3. Setup Center of Mass Center of Pressure

  4. Raw KINECT data Raw Wii data

  5. Calibration slope = 0.97 Position from WiiBoard Position from KINECT

  6. Spectrogram of Center of Pressure (Wii) Eyes Closed Eyes Open Mean power frequency

  7. MPF of CoM(Wii) - eyes open/eyes closed : Condition(posture) Eyes closed x Eyes open Mean power frequency [Hz] But theclassificationacrossposturesis not trivial.

  8. ClassifyEye‘s Open / Closed Liner SVM:76% Corr(head, right knee)

  9. Kalman filter & LQR state m observation of u u u mg l u

  10. Center of mass Auto-correlation 0.04 1 0.8 0.6 eyes closed 0.4 0.02 0.2 0 -0.2 0 -0.4 -0.6 -0.8 -0.02 -1 0 400 800 1200 1600 0 400 800 1200 1600 0.03 1 0.8 0.6 0.02 0.4 eyes open 0.2 0.01 0 -0.2 0 -0.4 -0.6 -0.01 -0.8 -1 0 400 800 1200 0 400 800 1200 Time Delay

  11. Conclusion • Which joints are more important for balancing? • Is vision or proprioception more important for balancing?

  12. Thank You!

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