Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 77 for “"Joint Angle"”.
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Joint Angle Estimation Method for Wearable Human Motion Capture
… method was validated for the elbow and shoulder joints with data from two garments with resistive, thread-based sensors sewn into the garments at multiple locations. The proposed method was able to estimate the elbow joint position with an average error of 2.2 degrees. The method also produced an …
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Principal Component Analyses of Joint Angle Curves to Examine Lifting Technique
… terms of its effect on lifting technique, interjoint coordination, and whether sex modulates these effects and 2) to explore the use of principal component analysis (PCA) as a method to investigate lifting waveforms. Thirty participants (15M, 15F) completed a freestyle, symmetrical lifting …
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Neuromuscular adaptations of joint angle-specific force change after isometric training
… training typically occur at or around the joint angles adopted during the training, but the mechanisms underpinning this have not yet been fully elucidated. This PhD thesis project investigated the mechanisms underpinning joint angle-specific strength changes after isometric training, …
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Development of knee joint angle trajectory tracking for leg support mechanism
… mechanism has ability of tracking the knee joint angle trajectory to imitate gait movement of a normal healthy person. The normal knee joint angle trajectory data is obtained from healthy person by using wireless Radio Frequency communication device and then plotted in Matlab Graphical User …
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Design and analysis of wearable conductive fiber sensors for continuous multi-axis joint angle measurements
… of continuous, long-term monitoring of human joint motion is one that finds many applications, especially in the medical and rehabilitation fields. There is currently a lack of acceptable devices available to perform such measurements in an accurate and non-intrusive way for a patient over a …
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Comparison of IMU-based elbow joint angle estimation methods for improved clinical assessment of spasticity and rigidity
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Variable Structure and Ultimate Boundedness control and stabilization of flexible robotic systems
… arm with uncertainty such as variable payload, joint angle frictional torque etc., is an interesting and important problem; Here we consider control of joint angles and stabilization of the flexible modes caused by the manuever of robotic arm by two methods. These are: (i) Variable Structure …
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POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
… velocity of contraction or the changes in joint angle (and hence the muscle length). A significant increase in median frequency was found with the loading of the muscle and also for a decrease in joint angle. On the other hand, no variation was observed due to velocity changes. The spectral …
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Optimal joint trajectory planning for a robot with elastic links
The optimal joint angle trajectory planning of light-weight flexible manipulator is investigated based on the cycloidal motions of each joint. The objective of the optimization is the minimization of link tip vibrations during and after joint motion, and the design variables are the inflection or …
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Predictors of Hallux Valgus: a study of heritability
… of the hallux at the first metatarsophalangeal joint; an angle 150 is considered as clinical hallux valgus. A niodel that predicts first metatarsophalangeal joint angle and thus, hallux valgus is potentially very useful; enabling the clinician to idcntify individuals at risk of developing the …
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Discovery of acoustic emission based biomarker for quantitative assessment of knee joint ageing and degeneration
… as a biomarker for quantitative assessment of joint ageing and degeneration. Signal processing and statistical analysis were conducted on the joint angle signals acquired using electronic goniometers attached to the lateral side of the legs during repeated sit- stand-sit movements. A four-phase …
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The effect of measurement technique, and load and fatigue, with changes in crank arm length, on lower limb kinematics in cycle ergometry
… Pedal forces in a cycling task can be defined by joint moment cost functions which describe the optimal relationship between pedalling rate and bicycle-rider geometry for any given power level. In a task where power level changes, variations in pedalling rate may result in different optimum values …
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Surface Electromyographic Control of a Humanoid Robot
… activity of the Biceps Brachii muscle and the angle of the elbow joint for the pseudo-static, unloaded arm case. The human arm was mechanically modeled for a two link system actuated by a single muscle. The SEMG activity was found to be directly proportional to joint angle using a combination …
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Novel Computational Infant Musculoskeletal Model for Biomechanical Analysis of Infant Movement
… N to represent the infant’s weight, the hip joint angle and external joint moment was calculated using inverse kinematics and inverse dynamics. Preliminary results showed a hip joint angle starting at 23.4° and 33.8° at the beginning of a kick, which then flexes to 66.6º and 66.3º at peak hip …
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Parallel factor analysis of gait waveform data: a multimode extension of principal component analysis
… waveform data (e.g., interrelationships between joint angle waveforms from different subjects and/or joints). Despite its widespread use in gait analysis, PCA is for two-mode data, whereas gait data are often collected in higher-mode form. In this paper, we present the benefits of analyzing gait …
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An embodied, platform-invariant architecture for robotic spatial commands
… factor. Currently, many applications rely on joint-angle-by-joint-angle prescriptions. This inherently requires a large number of parameters to be specified by the user that scales with the number of degrees of freedom on a platform, creating high bandwidth requirements for interfaces. This …
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A Principal Component Analysis Comparing Forward Skating Strides Pre-Post Skate Treadmill Training in Youth Hockey Players
… to investigate changes in kinematics. Continuous joint angle (deg) and angular velocity (deg/s) stride data for the trunk, hip, and knee were determined, time normalized, and averaged. PCA results suggested that most of the pre-post variance in skating mechanics could be explained through an …
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Using a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements
Joint angles can be an important measure in investigating sport-related injuries as well as in rehabilitation studies. Even though previous researchers have investigated using inertial measurement units to calculate joint angles, only a few studies can be found that were conducted using a single …
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The Effects of Fatigue on Biomechanics of Heading Performance in Soccer
… and then after each fatigue protocol. Six joint reflective markers were placed on the right side of each participant’s body. The statistical analysis between the baseline and after each fatigue protocol data was conducted using one-way repeated measure ANOVA at α = 0.05 and followed up by …
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Learning force fields for limb control in character animation
… simulated character animation. Vector fields of joint torques, defined over joint angle space, have been shown in the neuroscience literature to be able to generate simple reaching motions in two dimensions when linearly combined with time-varying weights. In this work, three-dimensional versions …
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