Dual-inertial navigation combination spin modulation navigation and online relative performance assessment method

A technology of rotation modulation and dual inertial navigation, which is applied in the field of online evaluation of inertial navigation performance, and can solve problems such as gyro zero bias changes, affecting navigation accuracy, and not involving
CN104897178AActive Publication Date: 2015-09-09NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2015-09-09

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Abstract

The invention discloses a dual-inertial navigation combination spin modulation navigation and online relative performance assessment method for solving the problem of difficulty in assessing inertial navigation performance. By the steps of coordinate system defining, combination spin modulation strategy arrangement, combination system state equation determination, measurement equation determination and Kalman filtering, online assessment of the inertial navigation performance is realized, and an information fusion effect among multiple inertial navigation systems is improved. The assessment method can be used for assessment of the inertial navigation system relative performance under long-endurance and high-precision navigation conditions and inertial navigation system fault diagnosis, and has positive significance to ensuring navigation precision under the long-endurance condition.
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Description

technical field

[0001] The invention relates to an online evaluation method for inertial navigation performance, in particular to a dual inertial navigation joint rotation modulation navigation and online relative performance evaluation method. Background technique

[0002] The inertial measurement unit (IMU) of the inertial navigation system is composed of a gyroscope and a meter. The accuracy of the gyroscope and the meter determines the performance of the inertial navigation system, and the inertial navigation performance determines the accuracy of navigation. Before the inertial navigation system is configured in a specific application environment, performance testing is required. At present, there are generally two types of tests for inertial navigation performance at home and abroad:

[0003] 1. Device level testing. It mainly conducts single-device testing for gyroscopes and adding meters, and constructs inertial measurement units by testing and screening high-precis...

Claims

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