考虑动态接触电阻的电磁能装备直线推进模型

Aiming at the problem of insufficient accuracy of armature speed calculation during the finite element calculation of linear propulsion electromagnetic energy equipment，an improved model of linear propulsion electromagnetic energy equipment considering dynamic contact resistance was proposed to make the calculation results closer to the actual working conditions． First，the control equations under the armature motion conditions of the linear propulsion electromagnetic energy equipment were derived for finite element analysis． Then，considering the influence of dynamic contact resistance on inductance gradient and armature speed，an improved model considering dynamic contact resistance was established on the basis of finite element analysis，and the PSO-GA (particle swarm optimization- genetic algorithm) hybrid algorithm was used to identify the parameters of the established model，so as to obtain the prediction function of inductance gradient and armature speed considering the influence of dynamic contact resistance．Finally，an experimental platform for linear propulsion of electromagnetic energy equipment was built to test the armature speed．By comparing the predicted values of the improved model with the experimental test values，it is found that the improved model can further reduce the computational error，and the prediction results show a better consistency with the actual test situation，which provides a certain theoretical basis for the research of full-fidelity simulation of linear propulsion electromagnetic energy equipment.