Papers by Keyword: Astronaut

Abstract: The human model in this paper is simplified as a rigid body of 15 segments and the Roberson-Wittenberg method is used to establish the equation of conservation of angular momentum to obtain the control methods of human self-rotation without external force in a weightless environment. And simulation of human dynamic is completed in ADMAS (Automatic Dynamic Analysis of mechanical Systems). The simulation results show that human can generate corresponding body rotation through own limbs rotation in the weightless, and body rotation velocity and angle increase with the moment of inertia and rotational velocity of active body that adds greater torque to joint. Through the analysis of the impact of the angular velocity and torque on the body rotation, a set of self-rotation control strategy for astronaut is proposed in weightless environment.

Abstract: Although inception of the measurement of astronaut body mass measurement was as old as Skylab era, progress in the field has not been as expected. There are fundamental physical difficulties as well as program management issues. New mass measurement systems with the current sensor technologies should be prepared, and the new sensor system could be expanded for “Drop Tower” in space.