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In this study, it was aimed to determine the forces and torques acting on the shoulder and elbow joints of the upper limbs, which are the most commonly used body parts in daily life. The subject was asked to take a certain load on the table while standing upright, bring him closer to himself and leave it back. A dynamic model was created using the Newton-Euler method to determine the joint force and torque occurring in the shoulder and elbow during the movements performed by the selected subject while performing this task. Wearable motion sensors were used to measure the location data of the joints. The torque and link force values in the joints were calculated using the dynamic model created with the motion data received from these sensors. The calculation results obtained were evaluated comparatively and it was revealed in which cases the forces and torques acting on the joints increased and what measures could be reduced. [ABSTRACT FROM AUTHOR]

In this study, the effects of vehicle vibrations on driver comfort are examined in terms of the magnitude of the vibration transmitted to the internal organs. For this purpose, a half car model was created with the vehicle seat and the driver with the internal organs. While the vehicle and its seat have 5 degrees of freedom, the driver is modeled as 4 degrees of freedom, and as a result, a system with a total of 9 degrees of freedom has been modeled. The bumps used as speed regulators on the roads are accepted as vibration input to the system while writing the equations of motion. Simulations were performed for different vehicle speeds and different bumper dimensions to evaluate the vibrations transmitted to the driver's head, internal organs and the driver's seat. When assessing the magnitudes of the vibrations transmitted to the internal organs, the root mean square is used. In the literature, suspension and driver seat designs take the criterion of reducing the vibration transmitted to the driver's seat, while few are based on the acceleration of the vibration transmitted to the driver's head. In this study, it is proposed to take into account the root mean square value of the vibration transmitted to both the head and internal organs of the driver in suspension, seat and bump designs. [ABSTRACT FROM AUTHOR]