The Research Of Dynamic Performance Of High-g Accelerometer

This paper has discussed the current sensor calibration technique around the world, the following two aspects of researches are performed about the dynamic performance of high-g accelerometer: research on quasi-static calibrations for accelerometer; research on dynamic calibrations for accelerometer. And the discussion of this topic is to establish a high-g calibration platform for scientific researches, production and development of our national defense weapons systems, which can offer effective methods for the dynamic actual situation measurement of penetrating weapons.The aims of this thesis are to establish the criteria about the duration of input acceleration pulses in the accelerometer calibration, to generate the input pulses with required durations by designing 2 different calibration devices through changing the bullet bottom shape, explosive impulse and changing the geometric dimensions of the Hopkinson bar. Having been searched abroad the related documents, the methods such as theoretical analysis,computer simulation,laboratory test are adopted to investigate the issues in question:(1) The criteria about the durations of the input acceleration pulse for the qusia-static and dynamic calibrations are established theoretically from the mathematic model of the accelerometer. And the relations of the duration of the pulses, the resonance frequency of the accelerometer are presented.(2) Two kinds of Hopkinson bar devices have been applied to generate pulses with required durations for quasi-static and dynamic calibration of accelerometer. The available durations of the pulses range from 6.62μs to 210μs.A kind of piezoelectric-type accelerometer 988 developed by 204 institute of the ministry of the weapon industry have been evaluated in the quasi-static calibration,dynamic calibration with the presented method. And the result of the calibrations entitled this calibration device and the method with validity.