Study On The Attitude Disturbance Influence Of The Manned Spaceship Induced By Astronaut Intravehicular Activities

The disturbances acting on the manned spacecraft in the orbit can be divided as outer ones and inner ones. Research indicates that outer disturbances can be described with simple analysis and be estimated by outer atmosphere, and inner disturbances induced by the mechanical motion are also predictable and computable, but the inner disturbances induced by astronautic motion are stochastic and hard to predict. Nevertheless, some manned flight mission requires the spacecraft has high pointing and stabilizing precision. So, it needs us to quantitatively analyze the astronautic disturbances, so as to evaluate flight mission and guide or improve spacecraft system design especially the attitude control system design. So, researching the manned spacecraft attitude disturbances induced by the astronaut's intravehicular activities is of great theoretical and practical significance. The studies included in this thesis are as follows:Firstly, divide the astronaut's intravehicular activities as freedom-state act, attitude changing act and cord-state act set according to certain guide line. Choose corresponding act units to combine drilling through vehicular in concept level.Secondly, at the premise of the basic hypothesizes, establish the"astronaut-spaceship"system dynamics equations based on the principle of momentum conservation, and simulate the disturbance influence of the spaceship attitude induced by five kinds astronaut's motion include stand-up act,landing act,right arm single-pendulum motion, left arm double-pendulum motion,right arm operating panel motion.Lastly, establish the rigid-body spaceship attitude kinematics and dynamics equations, and primarily design the spaceship attitude law including limit loop parameters and two kind switch curves. Analyze the astronaut's disturbance moments. Put the disturbance moments of typical astronaut's push-off act as the input datas of the control system simulation, and analyze the response of the attitude control system after disturbed.