Design And Error Analysis Of Microgravity Simulation Device In Space Agency

With the development of space technology,the space manipulator are playing an increasingly important role in space activities,and it would replace astronauts to complete more and more space operations.Need to perform a large number of ground microgravity tests on the robotic arm before launching into space,and therefore we need to build ground micro gravity simulation test system to test the function of space manipulator.In this paper,the research object is a ground microgravity simulation test system of deployable arm of the loop antenna on a high orbit satellite,and we design a microgravity simulation device to unload the gravity of the robotic arm,and study the mechanical properties of ground microgravity simulation test system on unload force environment,and establish a systematic analysis method to evaluate the accuracy of ground microgravity simulation tests.Summarizing the domestic and foreign research current situation of the development of space manipulator and ground microgravity simulation test,we introduce the ground microgravity simulation system of a high orbit satellite,and determine the technical implementation plan for the needs of the system and using the heavy-duty intelligent floatation vehicle to unload the gravity.According to the technical requirements of ground microgravity simulation test,we have detailed design of heavy-duty intelligent floatation vehicle,including system partition,system composition,power calculation,selection of key component,and the static analysis of the main force structure,and finally designed the control route of the floatation vehicle servo system.We establish a mathematical model of a robotic arm by combining static and dynamic analysis methods,and use Matlab to solve the distribution of unload deviation at each hanging point and its effect on root joint in different unfolding process.Finally,we assess the accuracy of the ground microgravity simulation test system.