Vibration-centrifugal compound test device for inertial instrument calibration

Abstract

The invention discloses a vibration centrifuging composite experiment device for inertia instrument calibration. The device comprises a precise centrifugal machine, a centrifugal machine rotating disc, a positioning platform, a plurality of vibration excitation systems, a linear sliding rail, a vibration excitation base and a test piece fixture; the centrifugal machine rotating disc is fixedly connected with a main shaft of the precise centrifugal machine, the positioning platform is fixedly connected with the centrifugal machine rotating disc, the vibration excitation base is fixedly installed on the positioning platform, the fixed end of the vibration excitation system is fixedly connected with the vibration excitation base, the platform surface end of the vibration excitation system is fixedly connected with the test piece fixture, and the bottom face of the test piece fixture is movably connected with the vibration excitation base through the linear sliding rail. According to the device, a vibration excitation platform is arranged at the tail end of the centrifugal machine, the weight and size of the vibration excitation system are small, the vibration excitation principle is simple, precise machining and precise adjusting are easy to achieve, on one hand, the defect that an existing similar device is low in precision is made up, and on the other hand, the vibration frequency band of the piezoelectric vibration excitation system is expanded by adopting a displacement amplification mechanism and can cover the vibration frequency range of dozens of hertz to thousands of hertz.

Description

technical field [0001] The invention relates to the field of inertial measurement testing, in particular to a vibration-centrifugal compound test device for calibrating inertial instruments. Background technique [0002] Inertial technology occupies a very important position in the fields of aviation, aerospace, navigation, military affairs, resource exploration and geophysics, and thus has become one of the key technical fields for development in countries all over the world. The accuracy of the inertial instrument directly determines the accuracy of the inertial guidance, and is one of the important performance indicators to measure the level of inertial technology. However, due to technical limitations such as design, manufacture and experimentation, it is very difficult to simply improve the accuracy of the instrument itself. Therefore, under the existing technological conditions, through methods such as test calibration, correction and compensation measures are taken t...

AI Technical Summary

Problems solved by technology

[0005] The invention patent "a standard compound acceleration output device" (patent publication number: CN 104019830 A) proposes a compound acceleration output device that combines an electromagnetic vibrating table with a precision centrifuge, but due to the heavy weight of the electric vibrating table, on the one hand Affect the performance of the centrifuge, on the other hand, the accuracy of overload and vibration acceleration is low

However, on the one hand, these inventions cannot simulate the high-frequency vibration of the real flight environment. On the other hand, the volume and complexity of the excitation system are large, which is not conducive to the processing and control accuracy of the control device.

[0007] Utility model patent "multi-parameter composite environmental test device" (authorized announcement number: CN 201777393 U), invention patent "overload composite environmental test bench" (application publication number CN 103091118 A), invention patent "a large overload and linear vibration "Composite test equipment" (application publication number: CN103148869 A) are devices related to composite environmental tests, but these test devices focus on reliability and functional testing, and cannot be used in the field of inertial instrument testing and measurement

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