University of Twente Student Theses
Validation of an ambulatory three IMU setup for measuring foot and CoM position in chronic stroke patients
Bex, A.J.M. (2023) Validation of an ambulatory three IMU setup for measuring foot and CoM position in chronic stroke patients.
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| Abstract: | Biomechanical analysis of human balance and gait can be useful in understanding gait patterns, quantify performance, and monitor and guide rehabilitation interventions. Ambulatory estimation of human balance and gait parameters requires knowledge of relative feet and centre of mass positions. Inertial measurement units positioned on each foot and the pelvis are useful for tracking these segments over time. However, they cannot be used to track relative distances between the segments. Additionally, drift due to strapdown inertial navigation results in erroneous relative estimates of feet and centre of mass positions. In this thesis a minimal inertial measurement unit setup is evaluated in which a Kalman filter approach is used to update estimated feet and centre of mass positions to eventually track the relative positions between the segments. The functionality of the update detectors was tested for 79 normal walking trials of ten chronic stroke patients comparing with the ForceShoes as a reference. We concluded that the zero-velocity update detector in the presented three inertial measurement units setup is suitable for use. The same is expected for the centroidal moment pivot update detector, but this requires additional testing. |
| Item Type: | Essay (Master) |
| Faculty: | TNW: Science and Technology |
| Subject: | 44 medicine, 50 technical science in general |
| Programme: | Biomedical Engineering MSc (66226) |
| Link to this item: | https://purl.utwente.nl/essays/97238 |
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