Research On Electromagnetic Docking And Separation Mechanism Of Micro-nano Satellite

The electromagnetic docking and separation mechanism of micro-nano satellite has the advantages of no fuel consumption,low docking impact,no plume pollution,low power consumption,light weight and so on.At the same time,it has synchronous,continuous and reversible non contact control ability,and can realize flexible docking of spacecraft.On the basis of the electromagnetic mechanism,the permanent magnet mechanism is supplemented by the permanent magn et,which uses the suction characteristic of the permanent magnet to realize the non power stable docking,and reduces the precision requirement and energy consumption in the progressive process,and improves the fault tolerance rate of the docking process.In this paper,a micro-nano satellite docking and separation mechanism which combines permanent magnet docking mechanism with electromagnetic separation and transposition mechanism is studied.First of all,according to the function expectation of the micro-nano satellite electromagnetic docking and separation mechanism,combined with the structure characteristics of the standard isomeric modularized micro-nano satellite,the overall structure scheme and the function realization method are proposed.The f unction of each component in the mechanism is clearly defined,and the position of the mechanism is reasonably arranged by the symmetry of the cube satellite,so that the satellite can realize the static docking,separation and transposition function of any two surfaces through the designed docking and separation mechanism.Secondly,theoretical analysis is carried out for the actuator in the mechanism,namely the coil permanent magnet electromagnetic mechanism.Based on the equivalent current model,the magnetic field distribution of the permanent magnet in the space is determined.The expression of the force of the electromagnetic mechanism is obtained by using the Lorenz force calculation formula and introducing the equivalent current layer.The correctness of theoretical analysis is verified by the finite element simulation results,which provides a theoretical basis for further optimization of electromagnetic mechanisms.Next,the permanent magnet docking mechanism is studied,the function and design idea of the permanent magnet docking mechanism are clearly defined.The permanent magnets are embedded in a variety of different magnetization methods,and their suction and magnetic fields are compared,and the optimization and improvement of the power energy of the satellite module separation and transposition mechanism are improved.The design rule of permanent magnet docking mechanism is designed,and the optimal design of permanent magnet docking mechanism is completed according to the design requirements,and the docking accuracy of the satellite module is improved by using the characteristics of the permanent magnet.And then,the electromagnetic separation and transposition mechanism are studied,its function and design ideas are clarifying,and a varie ty of electromagnetic mechanism structure scheme is put forward and a comparison of the preferred repulsion force is compared.Using the finite element simulation and the theoretical analysis of the design rules,the theoretical optimization of the size pa rameters of the electromagnetic mechanism is completed.The influence of the magnetic field produced by the electromagnetic mechanism is analyzed and the shielding measures are designed.Finally,the overall optimization design of the electromagnetic separation and transposition mechanism is completed.Finally,the experimental research on the electromagnetic docking and separation mechanism of the micro-nano satellite is completed.According to the characteristics of electromagnetic force and the force mod el,the kinematics analysis of the mechanism is completed.Combined with the optimized design of the permanent magnet docking mechanism and the electromagnetic separation and transposition mechanism completed before,the design,processing and assembly of the prototype are completed.The prototype is used to complete the static repulsion test of the electromagnetic mechanism and the functional verification of the static docking,separation and transposition of the whole mechanism.