Research Of Suppression Electromagnetic Interference In Airborne Radio Compass

Accompanied quick development of electronic techniques and equipments, electromagnetic environment in sky is completer and completer. Making the questions that airborne electronic equipment interfere each other appeared. Because work frequency of airborne radio compass is lower, that is medium and long wave, now, airborne radio compass is difficulty area that meet with electromagnetic interference. Now, electromagnetic interference is a key fact that restrict development of airborne radio compass, it affect development of airborne radio compass gravely.So, improving itself ability of airborne radio compass in suppression interference and increasing itself effect of airborne radio compass in actual apply is a important task. This course is combined actual work with author. Author researched the question penetrably and system for suppression electromagnetic interference in airborne radio compass.In course research, author analyzed basic principle of airborne radio compass and encounter electromagnetic interference factors. This factors include interference signals of medium wave broadcast station and short wave station and super short wave station and power of supply and control.In the side that suppress interference signal of medium wave broadcast station. Author calculated field intensity of interferences signal of medium wave broadcast station, Analyzed the interference principle of medium wave broadcast station, Designed the methods that suppress this interference signal. These include that raised tendency range and selecting ability of airborne radio compass. These methods obtained application.In the side that suppress interference signal of short wave station. Author measured field intensity of interferences signal of short wave station, Analyzed the interference principle of short wave station, Designed the methods that suppress this interference signal. These include filter wave method and closing method and eliminate method.In the side that suppress interference signal of super short wave station. Through calculation and test and analysis, Author funded cause that super short wave station signal interfere airborne radio compass. Designed the methods that suppress interference signal of super short wave station. These include that increase isolation in combination antenna and that eliminate distortion factor in front of airborne radio compass circuit.In the side that suppress interference signal of power and control. Author test range of interference signal. Analyzed the interference principle of signal in power and control. Designed the methods that suppress interference signal of power and control. These include filter wave method and good contact land method and protection method in hardware and protection method in software.Involving the factors of electromagnetic interference in the course were very greater, Involving the types of aircraft in the course were greater, Difficult that solve these questions of the electromagnetic interference were very greater. In course research, author take methods of calculation and test and analysis and experiment, Gated many achievements. Now, these achievements started apply on the many aircrafts that assembled airborne radio compass, And that obtained beneficial result well in economy and military.