Vibration suppression method and test validation of electronic devices for airborne equipments

ObjectiveAiming at the problem that electronic devices of airborne equipment are prone to failure in vibration environments, a vibration suppression method was proposed to provide technical support for the anti-vibration design of devices.MethodsFirstly, the acceleration tolerance limit of the device was obtained through sweep frequency tests, and a multi-level finite element model of the airborne equipment was established to carry out random vibration analysis. Secondly, the optimization direction was determined based on the Steinberg method. With the goal of maximizing the natural frequency, Tosca software was used for the configuration optimization of the support panel, and Isight software combined with the multi-island genetic algorithm was used to complete the size optimization. Finally, a prototype was fabricated and the effectiveness of the method was verified through vibration tests.ResultsAfter optimization, the maximum acceleration root mean square of the device mounting panel decreased by 19.91%, the transmission rate dropped to 1.56, the coupling effect with the support panel was significantly weakened, and the equipment quality remained basically unchanged. No device failure occurred in the test, and the vibration suppression effect was remarkable.