University of Twente Student Theses


Towards Real-Time Estimation of Ground Reaction Forces using 3 IMUs

Derla, C.R. (2023) Towards Real-Time Estimation of Ground Reaction Forces using 3 IMUs.

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Abstract:In biomechanical analysis, accurately estimating Ground Reaction Forces (GRFs) is crucial. Conventionally, this requires expensive force plates (FP) and complex gait laboratories. Our study explores the feasibility of estimating GRFs using a simplified setup of only three Inertial Measurement Units (IMUs): one placed on the pelvis and one on each foot. We investigated the accuracy of GRFs estimation at three different walking speeds (0.28m/s, 0.83m/s, 1.39m/s) for both feet. To make this possible, our method applies the Constant Walking Speed Assumption (CWSA) to investigate the real-time implementation of the Smooth Transition Assumption (STA). Although our approach encounters challenges with the accuracy of GRFs estimation at lower speeds and with the estimation of shear forces, potential solutions such as advanced signal processing, and the use of force-sensitive resistors (FSRs) could offer mitigation strategies. This research contributes to the field of biomechanics by suggesting a cost-effective and simplified method for estimating GRFs, with potential applications in sports science, clinical rehabilitation, and the design of assistive devices for individuals with mobility impairments.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Biomedical Engineering MSc (66226)
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