Print Email Facebook Twitter Dynamic in situ calibration of an instrumented treadmill for systems identification and parameter estimation Title Dynamic in situ calibration of an instrumented treadmill for systems identification and parameter estimation Author Amirtha, T.R. Contributor Sloot, L. (mentor) De Groot, J. (mentor) De Vlugt, E. (mentor) Van Der Helm, F.C.T. (mentor) Faculty Mechanical, Maritime and Materials Engineering Department BioMechanical Engineering Programme Biomedical Engineering Date 2012-10-29 Abstract Existing re-calibration methods for instrumented treadmills have mainly been performed when the instrumented treadmill has been in static operation i.e. the belts are not running. The effect re-calibrating during experimental operation, i.e. while the belts are running, on the ground reaction force (GRF) and the center of pressure (CoP) accuracy has not yet been studied due to difficulties of obtaining a range of test points across the treading area during experimental operation. Therefore, the effect of the dynamics of the treadmill’s moving parts on the re-calibration process is not known. In addition, the GRF and CoP accuracy requirements are not known for systems identification and parameter estimation (SIPE) experiments on instrumented treadmills. Here, a technique is described to comprehensively recalibrate a split-belt, instrumented treadmill, while it operates under experimental conditions, for SIPE of the lower extremity dynamics during gait. Re-calibration matrices are created with datasets that were generated under static and experimental treadmill operation and are assessed on validation datasets. No relationship was determined between the treadmill’s dynamics and the GRF and CoP errors. The dynamic re-calibration resulted in lower root-mean-square GRF and CoP errors than the static re-calibration did and was more rapid to calculate. The dynamic re-calibration matrix was additionally validated by performing SIPE of a load on the treadmill, which resulted in a relative error of 2%. Subject force platformforce platecalibrationcenter of pressureground reaction forcegaittreadmillaccuracymotion analysisoptimizationsystem identificationparameter estimation To reference this document use: http://resolver.tudelft.nl/uuid:c032128b-6759-4434-88ab-67b9eeec4e0b Embargo date 2012-10-29 Part of collection Student theses Document type master thesis Rights (c) 2012 Amirtha, T.R. Files PDF thesis_tina_amirtha.pdf 424.09 KB Close viewer /islandora/object/uuid:c032128b-6759-4434-88ab-67b9eeec4e0b/datastream/OBJ/view