Gyro Polarity Test and Output Value Fault Detection Method

Abstract

The invention discloses a gyroscope polarity test and output value fault detection method, which comprises the following steps: Step 1, gyroscope installation matrix description; Step 2, gyroscope measurement angular velocity solution; Step 3, using the earth's rotation angular velocity to calculate satellite inertial angular velocity and the theoretical value output by the gyro; Step 4, solving the satellite inertial measurement angular velocity; Step 5, using a combination of various gyro heads to locate the faulty gyro. The invention can conveniently and accurately test the polarity and output value of the gyroscope, and can realize mutual fault monitoring among the gyroscopes, can simplify the test process of the gyroscope’s whole-star state, reduce the requirements for testing equipment, and reduce the workload. It is used in the gyroscope whole-star test process, and can also be used in the stand-alone level and system level test process.

Description

technical field [0001] The invention relates to a detection technology, in particular to a gyroscope polarity test and output value fault detection method. Background technique [0002] The gyroscope is an indispensable inertial measurement sensor in the field of satellite control. The output measurement value of the gyroscope is related to the safety and success of the satellite on-orbit control. Once the positive and negative polarity is wrong, the satellite attitude and orbit control computer will output the opposite control. Torque may cause fatal damage to satellites. Most satellites in orbit operate at low angular velocities. Therefore, the polarity test under low angular velocity conditions is more important. The accuracy of gyro output directly determines the attitude control of satellites. Therefore, it is necessary to quickly and easily detect the correctness of the output value of the gyroscope, especially now that satellites have higher and higher requirements fo...

AI Technical Summary

Problems solved by technology

[0003] When testing the polarity and output value of a stand-alone gyro, the gyro is usually placed on a two-dimensional turntable, and the turntable rotates at a specified angular velocity to record the gyro output and judge the polarity of the gyro. The gyro is installed behind the satellite, and the satellite is relatively large in size and weight. If Using the conventional two-dimensional turntable rotation for testing, the workload is relatively large, and there is a risk of safe operation, especially for large satellites, the gyro installation configurations include the main and standby 3 orthogonal configurations, 3 orthogonal + 1 oblique configuration, The configuration often affects the design of the fault detection algorithm and the correctness of diagnosis. Many studies have been carried out on the fault detection of gyroscopes at home and abroad, mainly using probability statistics, attitude kinematics, etc., focusing on orthogonal installation configuration, the inclined-mounted gyroscope mainly uses the balance equation method for fault detection, and the detection algorithm is relatively complicated

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