No abstract

In this paper, an electrodynamic levitation gravity compensation system based on a new type of annular Halbach array permanent magnet is proposed. The magnetic levitation force model is established using the equivalent expansion method, and the reliability of the model is verified by comparing the results of numerical calculation and simulation analysis.Through magnetic field simulation experiments, the effects of rotating speed and air gap on magnetic levitation force and eddy current loss are analyzed. The control model of the electric magnetic levitation system considering the vertical speed is investigated, and the hybrid control method of force and position is used to realize the stable magnetic levitation control.Finally, an experimental platform is built to verify the feasibility of the electric magnetic levitation system. The results show that the magnetic levitation force can be improved and the eddy current loss can be reduced by setting the rotating speed and air gap reasonably.

The main purpose of the research is to realize the dynamic characteristics analysis of deployable array with three-dimensional (3D) clearance joints through the 3D clearance measurement. Through the analysis of geometric and mechanical characteristics of 3D clearance joint, the dynamic model of deployable array with 3D clearance is established. The 3D clearance measurement system is built with reference to the space two-point method and the system error is eliminated. A verification experiment is set up to evaluate the measurement method. The feasibility of the theoretical model is verified by comparing the measurement results with the numerical data of the deployable panel, and the effects of deployment speed, clearance radius and deployment mode on the dynamic properties of the deployable panel are studied. The experimental results show that when the vertical deployment mode is adopted, the single deployment time ranges from 30 s to 60 s, and the clearance radius varies from 0.1 mm to 0.2 mm, the dynamic characteristics of deployable array are best.

In this paper, an electrodynamic levitation gravity compensation system based on a new type of annular Halbach array permanent magnet is proposed. The magnetic levitation force model is established using the equivalent expansion method, and the reliability of the model is verified by comparing the results of numerical calculation and simulation analysis. Through magnetic field simulation experiments, the effects of rotating speed and air gap on magnetic levitation force and eddy current loss are analyzed. The control model of the electric magnetic levitation system considering the vertical speed is investigated, and the hybrid control method of force and position is used to realize the stable magnetic levitation control. Finally, an experimental platform is built to verify the feasibility of the electric magnetic levitation system. The results show that the magnetic levitation force can be improved and the eddy current loss can be reduced by setting the rotating speed and air gap reasonably.