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Infrared Camera Random Vibration Analysis

An infrared camera used in a harsh vibration environment was redesigned by our client, Hughes Electro-Optical Systems, in order to reduce manufacturing cost. To validate the design, and ensure the component could satisfy its stringent design requirements, CAE Associates was asked to develop a finite element model and conduct a vibration analysis of the unit.

A detailed, assembly-level model if the camera was generated in ANSYS, using a combination of shell, beam, solid, and lumped mass elements. This type of model was required in order to assess potentially deleterious coupling between modes of different components. The ANSYS modal and PSD analyses indicated potentially damaging modes in the operating spectrum, which were confirmed by sine-sweep testing of the camera.

CAE Associates' engineers worked with Hughes engineers to develop design modifications which met the design, manufacturability, and cost objectives of the unit. After these changes were implemented, the design passed all qualification testing and went into production.