title: Modified pendulum model for mean step length estimation.
abstract: Step length estimation is an important issue in areas such as gait analysis, sport training or pedestrian localization. It has been shown that the mean step length can be computed by means of a triaxial accelerometer placed near the center of gravity of the human body. Estimations based on the inverted pendulum model are prone to underestimate the step length, and must be corrected by calibration. In this paper we present a modified pendulum model in which all the parameters correspond to anthropometric data of the individual. The method has been tested with a set of volunteers, both males and females. Experimental results show that this method provides an unbiased estimation of the actual displacement with a standard deviation lower than 2.1%.
authors.affiliation: Multisensor Systems & Robotics Lab (SiMuR), Electrical Engineering Department, University of Oviedo, Viesques, Ed. 2, 33204 Gijón, Spain. simur@isa.uniovi.es
authors.forename: Rafael C
authors.initials: RC
authors.lastname: González
authors.forename: Diego
authors.initials: D
authors.lastname: Alvarez
authors.forename: Antonio M
authors.initials: AM
authors.lastname: López
authors.forename: Juan C
authors.initials: JC
authors.lastname: Alvarez
mesh_terms: D000328:Adult; D000465:Algorithms; D003198:Computer Simulation; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D007866:Leg / Q000502:physiology*; D008124:Locomotion / Q000502:physiology*; D008297:Male; D008954:Models, Biological; D010808:Physical Examination / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity