Electromagnetic Interference Control Technology for Satellite Navigation Equipment on Missile
With the development of integration of the electronic equipment on missile,due to the functions of microcomputer and satellite navigation module couples close in a small space,multi-source multi-frequency band signals interference with each other,which sometimes caused that the navigation equipment cannot be accurately positioned.To solve the problem,the electromagnetic in-terference(EMI)control methods for the integrated electronic equipment on missiles arestudied systematically.The electromagnetic radiation and harmonic interference characteristics of switching power supply and isolation devices in the circuit is studied.Based on the electromagnetic wave propagation principle in metal media,electromagnetic shielding finite element model is established by soft-ware,the influence of shield's conductivity,thickness,openings and other key factors on the shielding effectiveness are analyzed.Comprehensive approaches to EMI management such as key component design and terminal antenna shielding are proposed.A set of integrated electronic equipment is test and the results show that the interference signal intensity is reduced,the equipment positioning speed success rate is increased by 85％.
switching power supplysatellite navigation equipmentfinite element analysisshield efficiencypositioning success rate
万方数据
维普
