Method for evaluating accuracy and completeness of navigation system in real time and on line

Abstract

The invention discloses a method for evaluating the accuracy and completeness of a navigation system in real time and on line. According to the characteristic of information fusion of the navigation system, based on the multi-dimensional Gaussian probability distribution characteristic of a covariance matrix and a Rayleigh probability distribution characteristic of an inclusion radius threshold, real-time on-line evaluation of the actual navigation accuracy and completeness of the navigation system can be achieved. The method for evaluating the accuracy and completeness of the navigation system in real time and on line is easy and convenient to operate, makes full use of filtering information of integrated navigation, largely improves the calculation speed, meets the requirement for real-time performance of monitoring the performance of the navigation system, and guarantees an enough confidence coefficient. The method can be realized in an engineering mode easily, meets the requirements for the navigation performance of each leg, and has great actual application significance.

Description

technical field [0001] The invention relates to the technical field of navigation system performance evaluation and monitoring. Background technique [0002] The flight management system is the core equipment of a large aircraft avionics system. It integrates other systems, such as navigation systems, display systems, and autopilots, by providing multi-sensor-based integrated navigation functions, performance management functions, flight plan management functions, and flight guidance functions. During the entire flight process, the auxiliary crew realizes the automatic control of the flight task, ensuring that the aircraft automatically flies according to the expected plan and meets the flight performance required by the operation. [0003] The navigation function is the basic function of the flight management system, which provides the aircraft with the best estimate of the current state of the aircraft. FMS uses sensor accuracy data, sensor raw data, and current condition...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing navigation system lacks the real-time online calculation and warning capabilities of navigation accuracy and integrity, the purpose of the present invention is to provide a real-time online evaluation method for the accuracy and integrity of the navigation system, and realize the navigation system through probability conversion. Real-time online assessment of actual accuracy and integrity, providing technical support for civil aircraft operations to meet the navigation performance requirements required for each flight segment

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