A Highly Reliable Circuit Based on Shock Absorbing System

Abstract

The invention discloses a high-reliability circuit based on a vibration reduction system. The high-reliability circuit comprises a power supply part, a fixed frame, a navigation circuit board, four vibration reduction devices, and an optical fiber inertial navigation shell, wherein the power supply part is an object to be carried out vibration reduction, and comprises a heat dissipation plate; thefixed frame is fixed on the periphery of the heat dissipation plate of the power supply part, the navigation circuit board is fixed on the fixed frame, and the four vibration reduction devices, are located at the four vertexes of the heat dissipation plate correspondingly; and a structure composed of the power supply part, the fixed frame, the navigation circuit board and the four vibration reduction devices is arranged inside the optical fiber inertial navigation shell, the four vibration reduction devices are connected with the interior of the optical fiber inertial navigation shell and theheat dissipation plate through a first screw and a first nut. The high-reliability circuit has the advantages that the modularization is realized, the integral assembly is simple, the structure is symmetrical and compact, the vibration reduction systematization configuration is simple, the space volume is saved, the anti-vibration property is good, and the risk of failure of components such as crystal oscillators is reduced, and the reliability of components on a navigation board and a power circuit board is integrally improved.

Description

technical field [0001] The invention relates to the technical field of circuits with a shock absorbing structure, in particular to a highly reliable circuit based on a shock absorbing system. Background technique [0002] The fiber-optic inertial navigation of space round-trip aircraft provides real-time position and attitude information for the aircraft. Severe random vibration is the main mechanical environment faced by the fiber optic inertial navigation system on the aircraft, and these vibrations are transmitted to the fiber optic inertial navigation system installed on the aircraft. When the PCB vibrates violently, electronic components such as electronic components such as crystal oscillators that are sensitive to vibration will cause pin breakage or functional failure, and if the vibration level is too large, the performance of the device in working condition will also be at risk of performance degradation. In order to provide a good dynamic working environment, red...

AI Technical Summary

Problems solved by technology

The disadvantage of this type of installation method is that the filling glue on the board is not conducive to the heat dissipation of the power module or active devices, and at the same time, under high temperature conditions, it will cause thermal stress and reduce the normal working performance of the devices

The use of springs or non-metallic materials not only has high manufacturing costs, but also increases the structural space and complicates assembly.

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