Papers by Keyword: Weightlessness

Abstract: Astronauts will suffer the orientation transformation problem without external force condition in spaceflight mission. Based on the establishment of human body system dynamics equation, the recommended control methods are put forward to guide the astronauts to make their orientation changed. The movement process is simulated through use of ADAMS to confirm the feasibility of method. Finally, simulated weightlessness environment is developed to demonstrate the advantages of the recommended control method compared with other control methods. The results show that using the control methods developed in this paper will make astronauts spend less time and smaller joint torques in performing body rotation about single axis in simulated weightlessness. There has certain reference significance for astronauts to conduct orientation transformation in spaceflight.

Abstract: Weightless and narrow environment inside the spacecraft and on-orbit work require a lot in astronauts’ IVA clothing. Motion analysis suggests one-piece overall design should base on the curled stance. Toileting structure design which can overcome the one-piece overall’s toileting shortcoming especially for female is essential. 2 female IVA clothing with different structures are developed, then toileting time consuming test and static range-of-motion test are operated to select a better design. Result shows that style 2 performs better when toileting, and not only fits better, but also can provide the same flexibility compare with style 1, which integrates the protection, fitness and mobility.

Abstract: Based on Newtons laws of motion, equilibrium conditions of plane force system and ankle joint structural features, a force analysis was made of ankle joint when people leaning forward and standing on one leg and lifted lead with overweight and weightlessness. The results showed that force on the talus when people leaning forward and standing on one leg with overweight is 1.5 times of that in equilibrium and force on the talus when people standing on lifted lead with overweight is 1.3 times of that in equilibrium. The force on the talus in the above two conditions will increase with the increasing over-speed.