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Airborne distributed type POS (Position and Orientation System) real-time transfer alignment method and device

A transfer alignment and distributed technology, applied in the field of navigation systems, can solve the problems of complex calculation and inability to meet the accuracy requirements of nonlinear filtering methods

Active Publication Date: 2018-07-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for real-time transmission and alignment of airborne distributed POS, in order to overcome the problems that the traditional linear filtering method cannot meet the accuracy requirements and the calculation of the nonlinear filtering method is complicated

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  • Airborne distributed type POS (Position and Orientation System) real-time transfer alignment method and device
  • Airborne distributed type POS (Position and Orientation System) real-time transfer alignment method and device

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be checked and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] Each will be described in detail below.

[0021] see figure 1 , figure 1It is a schematic flowchart of an embodiment of the method provided by the embodiment of the present invention. The method for implementing transfer alignment of the airborne distributed POS provided by the embodiment of the present invention includes:

[0022] S101. Establish an error model and a mathematical model of the airborne distributed POS transfer alignment under t...

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Abstract

The embodiment of the invention provides an airborne distributed type POS (Position and Orientation System) real-time transfer alignment method and device. The method comprises the following steps: establishing a transfer alignment mathematical model and an error model of a large misalignment angle condition; carrying out time updating and measurement updating of a linear state variable and a non-linear state variable by utilizing KF (Kalman Filter) and UKF (Unscented Kalman Filter) respectively; then revising a speed, a position and a gesture of a subsystem by utilizing a linear state variable estimated value and a non-linear state variable estimated value. A position error and the linear state variable estimated value in a non-linear filtering process are used as parameters and the non-linear state variable estimated value in a linear filtering process is used as an error of the parameters, and compensation is carried out when a non-linear state variable one-step predicated covariance matrix and a linear state variable one-step predicated covariance matrix are calculated respectively, so that the transfer alignment precision is improved.

Description

technical field [0001] The invention relates to the field of navigation systems, in particular to a method and device for real-time transmission and alignment of airborne distributed POS. Background technique [0002] Multi-task remote sensing payload is one of the important development directions of airborne earth observation at present, such as integrating high-resolution surveying and mapping cameras, imaging spectrometers, large-field infrared scanners, and synthetic aperture radar (Synthetic Aperture Radar, SAR) on the same aircraft Multi-tasking payloads, airborne distributed array antenna SAR, etc. For an integrated aerial remote sensing system equipped with multi-task remote sensing loads, it is necessary to measure the motion parameters of each load distribution point with high precision. [0003] The distributed position and orientation system (Position and Orientation System, POS) is currently an effective means to obtain multi-point position, speed, attitude and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 宫晓琳刘刚陈隆君房建成
Owner BEIHANG UNIV
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