Accelerated stability test section for quartz flexible accelerometer and determining method thereof
An accelerometer, acceleration test technology, used in the testing/calibration of velocity/acceleration/shock measuring equipment, velocity/acceleration/shock measurement, measuring devices, etc.
Inactive Publication Date: 2011-11-16
BEIHANG UNIV
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Problems solved by technology
Through the novelty search of the existing technology, there is no research on the stability of the parameters of the quartz flexible accelerometer and the accelerated stability test method to improve the repeatability of the parameters at home and abroad.
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[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0056] A kind of quartz flexible accelerometer acceleration stability test section of the present invention, it is made of 5 identical comprehensive sections (each comprehensive section is the comprehensive section of rapid temperature change cycle and two kinds of stresses of random vibration), a comprehensive section sees figure 2 shown. Among them, the rapid temperature change cycle profile of a comprehensive profile is from normal temperature to temperature change rate α T Cool down to low temperature T 低 Back insulation 低 time, then from cryogenic temperature T 低 at temperature change rate α T Heat up to high temperature T 高 Back insulation 高 time, and finally from high temperature T 高 at temperature change rate α T Cool down to room temperature; random vibration of a comprehensive profile is defined as image 3 The power spectra...
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The invention provides an accelerated stability test section for a quartz flexible accelerometer, and the accelerated stability test section is composed of five same composite sections each of which is a section compounded by two stresses, namely quick temperature change circulation and random vibration. The invention provides a determining method of the accelerated stability test section, and the method comprises the following steps: 1, determining test factors, selecting the stress level, and designing a test scheme; 2, implementing an accelerating test for a section A; 3, implementing an accelerating test for a section B; 4, implementing an accelerating test for a section C; and 5, determining circulation numbers of the sections (A, B and C) capable of leading the parameters of the quartz flexible accelerometer to be stable so as to determine the accelerated stability test section with the highest efficiency for the quartz flexible accelerometer. The accelerated stability test section can be directly applied to products to promote the parameters to enter a stable state quickly in short time; compared with the existing accelerated stability test section, the test section has the advantages of high test efficiency, short test time, good product parameter repetitiveness and the like; three composite test cases can be adopted for implementation, and special dedicated equipment is not required to be manufactured.
Description
technical field [0001] The invention provides an acceleration stability test profile of a quartz flexible accelerometer, in particular relates to a temperature cycle and random vibration comprehensive test type of a quartz flexible accelerometer acceleration stability test profile and a determination method thereof, belonging to the technical field of reliability acceleration tests . Background technique [0002] Quartz flexible accelerometer is a mechanical pendulum accelerometer, which is used to sense the linear motion information of the moving carrier. It is the core component of the inertial navigation system. Its accuracy and performance largely determine the inertial navigation system. It is widely used in missiles, satellites, rockets and other aircraft, and plays a very important role in ensuring the stability of aircraft attitude and target accuracy. [0003] Before leaving the factory, quartz flexible accelerometer products must go through the accelerated stabili...
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Inventor 许丹陈云霞康锐
Owner BEIHANG UNIV