Research On Vibration Characteristics And Optimization Design Of Airborne Printed Circuit Board

Airborne electronic equipment is mainly used for the implementation of air alert,and can provide accurate navigation information.The reliability of airborne electronic equipment is directly related to the flight safety of the aircraft.Printed circuit boards are the main components of on-board electronics.It is subjected to different forms of vibrational loads at work.In order to improve the operational reliability of airborne electronic equipment,the vibration characteristics of the printed circuit board must be analyzed.For printed circuit boards,this paper contains the following four aspects of research:1)In the paper,using the idea of local homogenization,a simplified algorithm of PCB for component dynamic performance analysis is proposed.The algorithm is based on APDL language of C ++ and ANSYS.On the basis of this,a method based on Particle Swarm Optimization(PSO)for the layout optimization of airborne printed circuit boards(PCBs)has been established.Through a specific example,the optimal layout scheme under the four-point support is discussed.2)According to the actual characteristics of the printed circuit board,printed circuit board finite element model was established;the target PCB modal testing was carried out.Compared with the finite element simulation results.The results show that the modal experimental results are in good agreement with the simulation results and the correctness of the established finite element model is verified.3)According to the national military standard requirements of the military equipment for environmental experiments,finite element precision models were carried out random vibration analysis,harmonic response analysis and transient response analysis.The dynamic response characteristics of the target printed circuit board under different basic stimuli are more fully obtained.Under different elastic boundary conditions,the variation of PCB vibration response is discussed.The conclusion of vibration response provides a theoretical basis for the anti-vibration design of airborne printed circuit board.4)According to the dynamic characteristics of the printed circuit board anti-vibration optimization objectives,the installation of printed circuit boards,prestressed installation and placement of stiffeners on the vibration characteristics of printed circuit board is discussed in detail.The anti-vibration design of the printed circuit board was proposed.