Transfer aligning method of airborne distributed POS (Position and Orientation System)

A transfer alignment and distributed technology, which is applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problem of high transfer alignment accuracy, lower transfer alignment accuracy, and difficulty in ensuring alignment accuracy, etc. question

Active Publication Date: 2012-08-01
BEIHANG UNIV
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Problems solved by technology

This method, in addition to compensating for flexural motion, increases the robustness of the filter, but at the cost of reducing the accuracy of the transfer alignment.
For airborne distributed POS, i...

Method used

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  • Transfer aligning method of airborne distributed POS (Position and Orientation System)
  • Transfer aligning method of airborne distributed POS (Position and Orientation System)
  • Transfer aligning method of airborne distributed POS (Position and Orientation System)

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Embodiment Construction

[0039] Since the main inertial measurement unit of the distributed POS is usually installed in the center of the belly, and the sub-inertial measurement units are installed near different loads on both sides of the wing, under the influence of atmospheric turbulence, the wing is more prone to deflection than the belly. The present invention therefore models the flexural deformation of the airfoil.

[0040] Such as figure 1 Shown, concrete method of the present invention implements as follows:

[0041] 1. Using the method of mechanics to establish the motion model of the deflection deformation of the carrier aircraft wing, and obtain the deflection deformation angle μ and the deflection deformation angular velocity equation of motion;

[0042] (1) Use ANSYS software to conduct modal analysis on the wing structure, and obtain the first-order bending modal frequency ω of the wing m and the torsional mode frequency ω n ;

[0043] (2) The mathematical equation of wing bendin...

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Abstract

The invention provides a transfer aligning method of an airborne distributed POS (Position and Orientation System). The method comprises the following steps of: modeling deflecting motion of an aircraft wing by using a mechanical method; augmenting a deflection deformation angle and deflection deformation angular velocity generated by the deflecting motion of the aircraft wing into state variables of Kalman filter; on this basis, designing a Kalman filter by using a velocity+posture matching method; carrying out transfer alignment on a sub inertial measuring unit by using velocity and posture reference information obtained after carrying out information fusion by using a main inertial measuring unit and a GPS (Global Positioning System); and finally obtaining corrected velocity and posture information of each sub inertial measuring unit mounting point. The transfer aligning method provided by the invention has the advantages of strong independency and high accuracy and can be used for improving the transfer alignment accuracy of the distributed POS when deflection deformation exists in the aircraft.

Description

technical field [0001] The invention relates to a transfer alignment method of an airborne distributed POS, which can be used to improve the transfer alignment accuracy of the distributed POS when the carrier aircraft is deflected. Background technique [0002] Aerial remote sensing is a strategic technology that uses aircraft as an observation platform to obtain large-scale, high-precision images of the earth's surface or surface layer by using various imaging payloads. It is of great significance to national economic construction and national security. With the development of my country's economy, aerial remote sensing continues to develop in the direction of high resolution, high precision, integration of multiple remote sensing loads and array loads. [0003] In order to achieve high-precision imaging of remote sensing payloads, the aircraft needs to move in a straight line at a uniform speed. However, due to factors such as airflow disturbances and flight control system...

Claims

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Application Information

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IPC IPC(8): G01S19/40G01S19/49
Inventor 房建成张舟宫晓琳郭佳
Owner BEIHANG UNIV
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