Navigation method with radio assisted dead reckoning

Abstract

The invention relates to a navigation method with radio assisted dead reckoning. The invention comprises: collecting the parameters output by each of the Airborne Navigation Devices; acquiring the initial position information external input; adding, according to the position of the airplane, the magnetic heading information and the magnetic difference information to acquire a true heading; adopting dead reckoning method to acquire the position information calculated at the current moment; establishing a status equation according to a dead reckoning error model and a slant distance error model;establishing a measurement equation by using the position information of the dead reckoning system, the position information of the navigation table and the slant distance information; estimating thenavigation parameter errors by combining the status equation and the measurement equation and using the Kalman filtering; correcting the navigation parameters according to the estimated navigation parameter errors to complete the accurate estimation of the navigation parameters; and feeding back the acquired position and the wind speed in the current moment to the dead reckoning module to complete the estimation of the position in the next moment. The real-time accurate estimation of the navigation parameters is realized through a recursive solving manner.

Description

technical field [0001] The invention belongs to multi-sensor navigation technology, and relates to a navigation method for radio-aided dead reckoning. Background technique [0002] In order to improve the navigation accuracy requirements of the aircraft, it is generally equipped with a variety of navigation equipment, such as inertial navigation system (INS), global satellite positioning system (GPS), air data computer (ADC), radio navigation system, etc. INS can provide comprehensive navigation information autonomously, but it is expensive and its errors accumulate over time. GPS can provide position and velocity information around the clock without accumulative errors, but it relies on external information and is susceptible to environmental interference. Radio navigation is affected by navigation station switching and signal quality, and there are jumps in navigation results. ADC can provide flight atmospheric parameters, but cannot determine aircraft position and attit...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to provide high-precision, continuous and reliable navigation data with comprehensive data under low-cost navigation configuration and GPS failure, and make full use of the airborne AHRS, ADC and DME parameters, the present invention proposes A low-cost radio-assisted dead-reckoning navigation method, which can provide high-precision continuous and comprehensive navigation data for low-cost navigation configuration aircraft, not only does not use expensive inertial navigation systems, but also ensures comprehensive navigation when GPS fails Precise calculation of navigation parameters

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