Acceleration amplitude online calibration system of laser vibration system in high temperature condition

Abstract

The invention provides an acceleration amplitude online calibration system of a laser vibration system in a high temperature condition. The system comprises a standard vibrating device used for generating and outputting a standard sine vibration signal and calculating an acceleration of the standard sine vibration signal, a quartz lamp array used for placing and heating a standard test piece, a ceramic rod used for transmitting the standard sine vibration signal to the standard test piece and isolating the standard vibrating device and the quartz lamp array, and a laser polarization system used for testing an acceleration signal of the standard test piece, one end of the ceramic rod is connected with the standard vibrating device, and the other end of the ceramic rod is connected with thequartz lamp array. According to the system, the problem of transmission of the acceleration amplitude output by the standard vibrating device to a high temperature environment without loss is solved,the operating environment of a standard accelerometer is guaranteed to be in a normal temperature or a controllable state, and the metering guarantee requirement of a thermal modal test of an ultrasonic velocity air defense missile flat type thermal modal test system is met.

Description

technical field [0001] The invention relates to the technical field of measurement and calibration, in particular to a field calibration technology in a special environment, in particular to an online calibration method for the acceleration amplitude in a high-temperature environment of a flat-plate thermal modal test system for a hypersonic air defense missile. Background technique [0002] In many engineering fields such as spacecraft and launch vehicles, a large number of structural components work at high temperatures. For example, when missiles and spacecraft fly through the atmosphere at high speed, a large amount of heat is generated due to the friction between the airflow and the surface of the aircraft, so that the surface temperature of the aircraft can reach 600-2000°C. Excessively high temperature and temperature changes will lead to uneven thermal stress and thermal deformation in the structural components, which in turn will lead to changes in the shape, struct...

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Problems solved by technology

[0007] At present, there are no technical materials and literature available for online calibration of the vibration acceleration amplitude of the laser vibration measurement system in a high-temperature environment.

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