Platform attitude estimation method based on global satellite navigation signal three-dimensional wave structure

A global satellite navigation and attitude estimation technology, applied in the fields of navigation and radar detection, can solve the problem of low measurement accuracy of the micro inertial navigation attitude information system, achieve high attitude accuracy, improve utilization, and avoid occlusion.

Active Publication Date: 2020-04-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, the measurement accuracy of the developing miniature inertial navigation attitude information system is not high

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  • Platform attitude estimation method based on global satellite navigation signal three-dimensional wave structure
  • Platform attitude estimation method based on global satellite navigation signal three-dimensional wave structure
  • Platform attitude estimation method based on global satellite navigation signal three-dimensional wave structure

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] The invention adopts the dipole or the magnetic loop antenna of the electromagnetic vector sensor fixed on the platform to receive the global navigation satellite system signals such as GPS. The channels are separated from each other to form array data, and the signal processing method is used to calculate the platform attitude.

[0034] 1. Electromagnetic vector sensor receiving signal model

[0035] The direction of electromagnetic wave signal propagation is as figure 1 shown.

[0036] In the geodetic coordinate system, the parameters used for the direction of arrival of electromagnetic waves in space said, see figure 1 , represent the azimuth and elevation angles respectively, -π / 2≤θ≤π / 2, Then the arrival vector is The polarization properties of electromagnetic waves are represented by the polarization ellipse descriptor (γ, η), the polariz...

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Abstract

The invention discloses a platform attitude estimation method based on a global satellite navigation signal three-dimensional wave structure, and belongs to the technical field of radar detection andnavigation. According to the invention, a dipole or a magnet ring antenna of each electromagnetic vector sensor fixed on a platform is used for receiving GPS and other global navigation satellite signals to form array data; when a synchronous sampling platform conducts attitude measurement, sensors are matched and superposed to receive satellite signals; the attitude parameter corresponding to thedecoded modulus and the maximum value is the captured motion platform attitude; the attitude measurement refreshing period of the synchronous sampling platform is 1 chip period; when an asynchronoussampling platform conducts attitude measurement, each receiving unit collects information source satellite complex data of a plurality of decoding chips; a multi-dimensional tensor specific data structure is presented according to polarization array received data, and attitude estimation is realized by using array signal processing methods such as a spatial multi-signal classification eigenvalue algorithm and multi-dimensional tensor decomposition; and the attitude measurement refreshing period of the asynchronous sampling platform is a plurality of chip periods. According to the invention, anattitude measurement navigation technology is developed.

Description

technical field [0001] The invention relates to a platform attitude estimation method based on a three-dimensional wave structure of a global satellite navigation signal, belonging to the technical field of radar detection and navigation. Background technique [0002] The attitude information of the motion platform is mostly obtained from the fusion of other information by the inertial navigation sensor. At present, the attitude information system of the motion platform is complex in structure and has a high failure rate. The measurement accuracy is not high. In some aerospace applications, there are special requirements for attitude navigation, such as fast measurement speed, high precision, small volume, mass, energy consumption, high acceleration resistance, radiation resistance, extreme temperature resistance, vibration resistance, etc. These requirements make attitude navigation equipment costly. The received electromagnetic wave information is closely related to the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/45G01C21/00G01C21/08
CPCG01S19/45G01C21/005G01C21/08
Inventor 陈广东王媛万思钰刘耀辉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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