PowerPoint-Prsentation

Kahori KitaYoshiyuki SatoJohn RocamoraFrank SchumannScott Yang

Kiwii Project MotivationWhich joints are more important for balancing?

Is vision or proprioception more important for balancing?

- Show the Wii / Kinect in Hardware(!)Animation-- Step on, -- Two Feet, -- One Foot, One Foot Eyes Closed , Back to Two Feet.

=> Center of Pressure jitters more with closed Eyes.

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Center of PressureCenter of MassSetup

Raw KINECT dataRaw Wii dataCalibration

Position from WiiBoardPosition from KINECTslope = 0.97Spectrogram of Center of Pressure (Wii)Eyes OpenEyes Closed

Mean power frequencyTime Frequency Plot:

With closed eyes, the COP jiggles more. Mean Power Frequency picks that6

Mean power frequency [Hz]: Condition(posture)Eyes openEyes closedBut the classification across postures is not trivial. xMPF of CoM(Wii) - eyes open/eyes closedClassify Eyes Open / Closed01100010X1X2XmTrial1Trial2trialNCorr(head, right knee)Liner SVM:76%Kalman filter & LQRmlmgustateuuuAuto-correlationCenter of massTimeDelayeyesclosedeyesopen040080012001600-0.0200.020.04040080012001600-1-0.8-0.6-0.4-0.200.20.40.60.8104008001200-0.0100.010.020.0304008001200-1-0.8-0.6-0.4-0.200.20.40.60.81ConclusionWhich joints are more important for balancing?

Is vision or proprioception more important for balancing?

- Show the Wii / Kinect in Hardware(!)Animation-- Step on, -- Two Feet, -- One Foot, One Foot Eyes Closed , Back to Two Feet.

=> Center of Pressure jitters more with closed Eyes.

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ThankYou!