To study the characteristics of cargo extraction, the initial phase of airdrop process, a high fidelity and extendibility simulation model with uniform motion equations for all states during extraction is developed on the basis of dynamics methods and contact models between cargo and aircraft.

The paper introduces the importance and the requirement of the extra-vehicular working including developing the ground test equipment, ground testing, and establishing operation procedure of extra-vehicular working.

Since the first EVA (Extravehicular Activity) was carried out by Aleksei Leonov on March 18, 1965 from the Voskhod 2 spacecraft, EVA development passed through two stages: the trial stage from 1965 to 1980 and the mature stage from 1981 to 2010.