Print Email Facebook Twitter Kinematics analysis of an end-effector-based orthosis for the lower limb allowing for adduction and flexion Title Kinematics analysis of an end-effector-based orthosis for the lower limb allowing for adduction and flexion Author Kluwen, Daan (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Cognitive Robotics) Contributor Marchal Crespo, L. (mentor) Vallery, H. (graduation committee) Peternel, L. (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering Date 2022-01-27 Abstract Rehabilitation robotics is a rapidly growing field in the engineering industry. Due to the high repeatability of motion, high therapy costs, and lack of proper quantitative assessment of patient status and progress, rehabilitation centers could benefit from the introduction of robotics. One such device already commercially available is the bodyweight supported treadmill device Lokomat (Hocoma, Switzerland). In this thesis, the kinematics analysis for a modified Lokomat orthosis has been made and validated. These kinematics calculate the Euler angles of the orthosis hip joint as a function of eight degrees of freedom, two degrees of freedom of actuators driving the thigh, and six degrees of freedom of the orthosis pelvis body. The kinematics were validated by using a low-cost HTC Vive VR tracker system, to capture the actual angle of the orthosis hip joint. The kinematics were tested in three experiments. Firstly, the kinematics were tested by moving the orthosis around by hand, tracing the range of motion of the linear actuators. Afterward, the kinematics were validated with a person wearing the device. The first dataset has the person suspended in the air, simulating walking, whilst the final dataset has the person dragging their feet over the ground, to simulate walking. The results from the first experiment indicate that the kinematics calculation tracks the measured angles with an RMSE of less than 6% of the total range of motion. Later experiments suffered from drift in the Vive trackers, mainly in the flexion angles, worsening performance. Compensating for this drift shows the kinematics to still be similarly accurate to the first experiment. Subject kinematic modelingExoskeletonOrthosisbodyweight supported treadmill trainingHTC Vivemotion tracking To reference this document use: http://resolver.tudelft.nl/uuid:b96a8ef3-9ea9-4fc9-a740-b4723841a03b Part of collection Student theses Document type master thesis Rights © 2022 Daan Kluwen Files PDF Thesis_DK_17_1_22.pdf 3.59 MB Close viewer /islandora/object/uuid:b96a8ef3-9ea9-4fc9-a740-b4723841a03b/datastream/OBJ/view