Airborne Positioning via Adaptive Multi-Source Fusion
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Solution Overview
Problem
The existing airborne positioning technology based on omnisource information fusion faces challenges such as complexity in information processing and transmission, collaborative processing of different sensor data, and limited availability of land-based navigation sources, which affects the accuracy and reliability of positioning services, especially under natural or artificial interference.
Innovation Solution
An airborne positioning method and system that integrates satellite-based, land-based, and inertial navigation systems, using an adaptive fusion algorithm based on variance optimization to combine navigation sources dynamically, filtering data through dead reckoning, and monitoring data integrity to enhance positioning accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple navigation sources are fused to improve positioning reliability, then the system becomes more complex in information processing and transmission
Solution Approach 1:
The patent segments the information processing by dividing it into distinct modules: data acquisition module, data processing module, and positioning calculation module. Each module handles specific tasks independently, reducing overall system complexity while maintaining reliability through coordinated operation of these segmented components.
Solution Approach 2:
The patent introduces a data processing module as an intermediary between data acquisition and positioning calculation. This intermediary module pre-processes multi-source navigation data, filters invalid information, and standardizes data formats, thereby simplifying the subsequent positioning calculations and reducing the burden on the overall system.
2Reliability
If traditional navigation systems are used under interference conditions, then positioning accuracy deteriorates due to vulnerability to natural or artificial interference
Solution Approach 1:
The patent merges multiple navigation sources (GNSS, inertial navigation system, land-based navigation system) into a unified positioning system. By combining data from these diverse sources through data fusion algorithms, the system maintains positioning accuracy even when one source is interfered with or unavailable, as other sources can compensate for the degraded signal.
3Device complexity
If single navigation system is used to simplify the system, then the system cannot provide effective PNT services under interference conditions
Solution Approach 1:
The patent implements dynamic source selection and data fusion where the system automatically adjusts which navigation sources to use based on current signal quality and interference conditions. This dynamic adaptation allows the system to maintain simplicity in normal conditions while automatically activating additional sources and more complex fusion algorithms when interference is detected, providing versatility without permanent complexity.
Data Source
AI summary
The present application discloses an airborne positioning method and system for an aviation navigation network, and relates to the technical field of satellite navigation. The airborne positioning method for an aviation navigation network is applied to an omnisource navigation system, and comprises the following steps: acquiring the original observation data of the omnisource navigation system; Filtering the original observation data based on dead reckoning to obtain filtered observation data; Unify that filtered observation data in time and space to obtain observation data to be fused; The adaptive fusion algorithm of omnisource navigation based on variance optimization is adopted to fuse the observation data to be fused to obtain the fused data; the fused data is used to characterize the position of the target aircraft at the current moment. The present application can improve the accuracy of the positioning result.