Simulation Analysis And Experimental Research Of A New Capture Docking Mechanism

The capture of the spacecraft is a key technology in the field of aerospace,it is the guarantee to realize the space docking mission that the design analysisand simulation of capture mechanism. It can guarantee subsequent on-orbitdocking after Spacecraft capture, thus, which can realize the assembly, thereplacement of on-orbit module, capture recycling scrap module in space, greatlyimproving the service life of the spacecraft and reducing the costs of aerospacescientific experiments.In this paper, with comprehensive comparison the technology of the captureprogram at home and abroad,it has carried on the overall scheme design andkinematics analysis by combining with technical requirements for this topic forcapturing mechanism for a new type of three jaw docking mechanism applied tothe orbiting spacecraft captured, the scheme has independent drive controlsystem, it is made that the movement characteristics of component motionanalysis, the mathematical model established can provide theoretical support forthe subsequent simulation analysis.By using the Newton-Euler mathematical method, it can establish thedynamics equation of spacecraft docking capture buffer stage, makingmathematical description of the equations of the buffer with using the vectormethod and differential matrix respectively, establishing a buffer energy transferequation and mathematical description during the capture position approaching,it is made that dynamics analysis through computer simulation software forcapture process of mechanism, mainly to verify the rationality of mechanismdesign and get the mechanical properties of buffer process curve, the bufferparameter change rule is identified at different initial value, it confirms the bufferparameter value scope with meeting the requirements of the buffer force.dynamics characteristics meet the requirements through the simulation analysis on the institution’s overall. At the same time, finite element static analysis isconducted for key components of lock claw, The results appear in the stress andstrain of the danger zone, the lock claw optimization design was carried out inorder to improve the safety and reliability. The modal analysis is made to obtainthe lock claw each order modal vibration mode, the optimized lock claw structurecomply with the safety and reliability requirements.Finally, Physical experiment research is conducted for the dockingmechanism of spacecraft capture. it verified the rationality of the design ofinstitutions through experiment，and making validation parameters matching ofdesign index. Through the vertical spacing of different initial lifting test, itvalidates the rationality of the mechanics parameters.