Extraterrestrial celestial body landing multi-dimensional all-condition IMU performance verification and evaluation method

Abstract

The invention discloses an extraterrestrial celestial body landing multi-dimensional all-condition IMU performance verification and evaluation method. The method comprises the following steps: 1, obtaining a test matrix of an IMU product according to task requirements of a Tianzhi No.1 Mars landing patroller; 2, testing the IMU product according to the test matrix of the IMU product; and 3, carrying out mechanical environment adaptability evaluation, thermal environment adaptability evaluation, navigation working condition adaptability evaluation and inertial parameter measurement capability evaluation on the tested IMU product. According to the invention, the high requirement on reliability of the IMU in a landing task and the high requirement on inertial navigation precision of the IMU under multi-dimensional and full working conditions are met.

Description

technical field [0001] The invention belongs to the anti-overload ability of IMU products under multi-dimensional and full working conditions, the adaptability of parachute characteristics, the ability to maintain the explosive performance of pyrotechnics, and the inertia of IMU products under reverse thrust landing conditions of large-thrust engines during the landing process of extraterrestrial celestial bodies. The technical field of inertial navigation performance under comprehensive working conditions of conduction performance and mechanical heat, especially relates to a multi-dimensional and full working condition IMU performance verification and evaluation method for extraterrestrial celestial body landing. Background technique [0002] The Inertial Measurement Unit (IMU) is the core unit of the spaceborne navigation system. It does not rely on external input information, and can measure the three-axis angular velocity and apparent acceleration of the carrier relative ...

AI Technical Summary

Problems solved by technology

[0003] In addition, with the continuous advancement of manned space missions, the accuracy requirements for the landing point of the earth's return and lunar landing are also continuously improved. The accuracy of the earth's return landing point has increased from tens of kilometers to the kilometer level. The accuracy has been increased from the previous kilometer level to the 100-meter level. The reliability of the existing IMU in the landing mission cannot meet the high requirements, and the IMU inertial navigation accuracy under multi-dimensional and full working conditions cannot meet the high requirements.

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