Design And Experiment Of Electromagnetic Mechanism For Spacecraft Docking

In order to resolve the problems caused by the thruster such as the contamination of the propellant ejected to the docking port, the docking collision and the propellant consumption during the spacecraft docking, the electromagnetic-docking system which could avoid the contamination, consume no propellant,realize the zero-velocity-collision docking is proposed. The electromagnetic mechanism, one of the key components of the electromagnetic docking / disparting system is researched in the paper.Firstly, the general configuration of the electromagnetic mechanism is proposed based on the disadvantages of the electromagnetic systems in correlative studies abroad. By comparing lots of detailed projects, some significant conclusions of the electromagnetic mechanism are concluded, also the final configuration is determined.Secondly, the experiment of the characteristic-test of the electromagnetic mechanism is designed theoretically and founded. The theoretic conclusions concluded are proved by the result. The One-dimension mathematical model which indicates that the force attenuates with the power of 3.4 of the distance and the models of two freedoms and three freedoms based on the one-dimension model are established.Thirdly, as the power aboard is limited, the problem of the minimum-time control in one-dimension docking is discussed via the PrincipleЛ.С.ПОНТРЯГИН. The controllability condition under the two-dimension situation is also discussed briefly.Finally, in order to validate the control arithmetic of electromagnetic docking, a framework of the validating experiment on the earth is established.