Accelerometer vibration imbalance error evaluation method and device, storage medium and equipment

An accelerometer and error assessment technology, which is applied in the testing/calibration of speed/acceleration/shock measurement equipment, speed/acceleration/shock measurement, measurement devices, etc. The problem of high product technical risk has the effect of shortening development time, realizing low cost and reducing design risk.
CN114324979APending Publication Date: 2022-04-12北京轩宇空间科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京轩宇空间科技有限公司
Publication Date
2022-04-12

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Abstract

The invention discloses an accelerometer vibration imbalance error evaluation method and device, a storage medium and equipment, and the method comprises the following steps: (1), building the input excitation of an accelerometer based on a random vibration principle; (2) establishing an accelerometer vibration output model, and modeling accelerometer output as truncation normal distribution; and (3) deriving expectation of truncation normal distribution according to the steps (1) and (2), and calculating the vibration imbalance error of the accelerometer. The evaluation device comprises an input excitation establishing module which is used for establishing accelerometer input excitation based on a random vibration principle; the output model building module is used for building an accelerometer vibration output model and modeling accelerometer output as truncation normal distribution; and the calculation module is used for calculating the vibration imbalance error of the accelerometer according to the expectation of deducing the normal distribution of the truncation form. The evaluation method can effectively reduce the design risk of the inertial navigation system, shorten the development time and improve the reliability of the inertial navigation system.
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Description

technical field

[0001] The present invention relates to the technical field of accelerometers, in particular to an accelerometer vibration imbalance error evaluation method, device, storage medium and equipment. Background technique

[0002] The aircraft is affected by atmospheric fluctuations and its own engine vibration during flight. To ensure the attitude of the aircraft is stable, it is necessary to ensure that the inertial navigation system is not interfered by the above vibration signals and outputs effective attitude information. Accelerometer, as the main device for aircraft inertial navigation measurement, is sensitive to vibration information, and the output accuracy of accelerometer directly affects the accuracy of inertial navigation system.

[0003] The traditional technical solution is to simulate the flight application conditions of the aircraft through the vibration table to verify the performance indicators of the inertial navigation system after the design...

Claims

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