PCB Vibration Test Failure Analysis for Helicopter-borne Equipment

The mechanism which results in the PCB failure in a vibration test for the helicopter-borne electronic equipment is described in this paper by theoretical analysis and ANSYS dynamic calculation．The calculation results agree with the test phenomenon．Resonance and defects in PCB design are determined as the reasons of the PCB failure．The structural interface problem which results in the resonance is analyzed． And the structural and electronic improvement measures are introduced，too．