Musculoskeletal dynamics analysis of lower limb and its application using a wearable sensor system
Year: 2009
Type: dissertation
Abstract: Human motion analysis is fundamental for rehabilitating and clinical applications but data are commonly obtained by means of the traditional laboratory-restricted equipment such as a force plate and optical camera system.A wearable sensor system was developed for an ambulatory and unobtrusive motion measurement of lower limb in everyday activities instead of the traditional one.Moreover, musculoskeletal dynamics analysis of lower limb can provide a deeply and quantitatively understanding of motion mechanism and assessment of motion abilities.In this dissertation, musculoskeletal dynamics analysis of lower limb and its application using the wearable sensor system were presented for developing a new biomechanical analysis technique.Firstly, the wearable sensor system integrating force sensor and motion sensor was introduced.Then, a new method based on the sensing signals and gait cycle was demonstrated for kinematics analysis of ankle, knee and hip joints.And an inverse method suitable to the wearable sensor signals was developed for joint dynamics analysis.In experimental study, a force plate & optical camera system as a reference, the sensing signals and the results of joints kinematics and dynamics analysis using the wearable sensor system were validated through statistical analysis.For musculoskeletal kinematics analysis, a reliable processing was designed to estimate individual dynamic musculotendon lengths and moment arms of lower limb in vivo.Regression equations inputting skeletal morphological parameters for calculating musculotendon origin-insertion coordinates and anthropometric method measuring skeletal morphological parameters ensure that the method can be conveniently operated.In virtue of muscle mechanical properties, static optimization method to calculate muscle forces was presented, and surface electromyography signals as a reference to evaluate the predicted results of muscle force.In this study, the whole analytical processes of musculoskeletal dynamics of lower limb were built, meanwhile, feasibility and effectiveness of the musculoskeletal dynamics analysis and its application was testified using the wearable sensor system.
Author: Rencheng Zheng
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2338127331