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Reconstruction method of complex shape of flexible plate structure based on two-dimensional orthogonal curvature

A technology of complex structure and flexible board, which is applied in the reconstruction of complex shape of flexible board-like structure, and the field of shape reconstruction of flexible board-like structure based on two-dimensional orthogonal curvature, which can solve the coupling error of aerospace vehicle matrix structure and the large amount of collected data. , complex data processing and other problems, to overcome the low accuracy of complex deformation reconstruction based on one-dimensional one-way curvature information, high detection accuracy, and small amount of collected data

Inactive Publication Date: 2018-05-01
SHANGHAI UNIV
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Problems solved by technology

Compared with aerospace applications, these measurement methods and technologies have the following disadvantages: a large amount of collected data, complex data processing; low acquisition accuracy, low reconstruction accuracy; easy to produce coupling errors with the aerospace vehicle base structure

Method used

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  • Reconstruction method of complex shape of flexible plate structure based on two-dimensional orthogonal curvature
  • Reconstruction method of complex shape of flexible plate structure based on two-dimensional orthogonal curvature
  • Reconstruction method of complex shape of flexible plate structure based on two-dimensional orthogonal curvature

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Embodiment 1

[0055] see figure 1 , the complex shape reconstruction method of flexible plate structure based on two-dimensional orthogonal curvature, is characterized in that: the specific operation steps are as follows: (1) the establishment of orthogonal curve network: using optimally designed discrete distributed orthogonal fiber gratings to form transmission Sense network, by obtaining the two-dimensional orthogonal curvature information of each grating measuring point on the surface of the plate structure, and on the basis of continuous curvature, the plate structure is meshed, and the orthogonal curve network of the plate structure is established; ( 2) Node coordinate recursion: construct a motion coordinate system on the orthogonal curve network, use the motion coordinate system to calculate the relative coordinates of the measurement points under the motion coordinate system, and calculate its global coordinates on this basis; (3) Coupling transformation of the motion coordinate sys...

Embodiment 2

[0057] see Figure 2 to Figure 10 , the present embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0058] The establishment of described step (1) orthogonal curve network, concrete steps are as follows:

[0059] Continuous curvature: Due to the limited and discrete nature of the grating measurement points, direct fitting and reconstruction cannot accurately reflect the deformation of the plate-like structure, and reasonable interpolation is performed on unmeasured points to achieve continuous curvature; the interpolation algorithm adopted is a linear interpolation algorithm;

[0060] ● Orthogonal curve network construction: On the basis of continuous curvature, select two measurement points with the same distance Δs, and connect the measurement points from the coordinate axes u and v directions of the two-dimensional space to form an orthogonal curve. arc-length grid; the orthogonal curvatures of the measurement points are the curvat...

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Abstract

The invention relates to a method for reconstructing the complex shape of a flexible plate structure based on discrete distributed two-dimensional orthogonal curvature. The two-dimensional orthogonal curvature information of each grating measuring point, and on the basis of continuous curvature, carry out grid division on the plate structure, and establish an orthogonal curve network of the plate structure; construct a motion coordinate system on the orthogonal curve network, Use the motion coordinate system to calculate the relative coordinates of the measurement points in the motion coordinate system, and calculate its global coordinates on this basis; obtain the torsion angle of the motion coordinate system in two directions, and use the torsion angle to update the motion coordinate system. The hardware environment required for this method includes a square flexible plate structure experimental model, an optical fiber grating sensor network with optimized distribution implanted on the surface of the structure, an optical fiber grating network signal analyzer, an algorithm operation and graphics processing computer, and a display .

Description

technical field [0001] The invention relates to a method for reconstructing the complex shape of a flexible plate-like structure, in particular to a method for reconstructing the shape of a flexible plate-like structure based on two-dimensional orthogonal curvature, which is applicable to the reconstruction of a complex shape of a flexible plate-like structure fixed at one end . Background technique [0002] Plate structures are widely used in industrial applications, such as near-Earth satellites, deep space probes, space stations, large-wing aircraft, phased array radars, phased array antennas and other aerospace vehicles. The aerospace environment has particularities in terms of gravity, temperature, external damping, and electromagnetic radiation. These characteristics can easily lead to structural flexible deformation and shape changes of the above-mentioned plate-like structures, and can even cause structural topological damage, resulting in system performance degradat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
Inventor 朱晓锦张合生高志远李明东刘凯宁耿路
Owner SHANGHAI UNIV
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