A 3D spatial relationship construction method for classic orbits based on osg 3D engine
A technology of three-dimensional space and three-dimensional engine, applied in the field of three-dimensional modeling, can solve the problems of unintuitive display of orbital elements and inaccurate representation of spacecraft pose, etc., to achieve intuitive display and reduce data dependence
Active Publication Date: 2017-05-03
BEIJING INST OF CONTROL ENG
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Problems solved by technology
Solved the problems that the display of the orbital element is not intuitive, the orbital element needs to be converted twice, the attitude and viewing angle adjustment under the orbital system need additional data, and the spacecraft pose is not accurate, etc.
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[0028] The basic processing method of the present invention is to add transformation matrix nodes in the OpenSceneGraph (OSG) three-dimensional scene according to the geometric relationship of the six roots. In the transformation process of the six root numbers, the four parameters of ascending node right ascension (Ω), orbital inclination (i), perigee argument (ω) and true anomaly (f) are transformed by adding a rotation transformation matrix node Realization, that is, coordinate system transformation according to the above four parameters, including important coordinate systems such as the original geocentric coordinate system, spacecraft coordinate system, and viewing angle coordinate system; the two parameters of perigee angle and true anomaly angle need to add new nodes The layer is used to realize the perspective tracking and control the attitude of the orbit system.
[0029] OpenSceneGraph (OSG) is a 3D open source scene graph system application programming interface (A...
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The invention discloses a classical orbit three-dimensional spatial relationship construction method based on an OSG three-dimensional engine. Spatial relationships are directly established based on six elements of an orbital system, and geometrical angle changing processes of the right ascension of an ascending node, the orbit inclination, the perigee argument and the true anomaly can be dynamically displayed. An orbital element parameter representation process is based on the space geometry relationships, and satellite visual angle tracking and position calculation are not subjected to secondary coordinate transformation. The orbital elements can be visually displayed, and an orbital system (VVLH) visual angle positioning problem under a traditional model is solved by the introduction of two layers of new coordinate systems. Four attitude input interfaces of matrixes, Euler angles, Euler axial angles and the quaternion of a relative orbital system are provided by a spacecraft, and the spacecraft body axis and the orbit axis are displayed and customized through the spacecraft, the analysis of the correctness of the in-orbit attitude of the spacecraft is facilitated, and problems that the orbital elements cannot be visually displayed, the orbital elements need the secondary transformation, the attitude adjustment and visual angle adjustment of the orbital system require additional data, and the position and orientation of the spacecraft cannot be accurately displayed are solved.
Description
technical field [0001] The invention relates to a method for constructing a three-dimensional spatial relationship of a classic track, in particular to a method for building a three-dimensional spatial relationship of a classic track based on an OSG three-dimensional engine, and belongs to the technical field of three-dimensional modeling. Background technique [0002] With the continuous development of aerospace technology, the number of spacecraft in space continues to increase, and they perform various tasks in space, and their roles are becoming more and more important. In order to better observe or design the operating state of the spacecraft, it is hoped to carry out real-time three-dimensional visualization simulation modeling of the orbital space of the spacecraft, and realize the tracking transformation of the observation angle of the spacecraft. [0003] The classic orbit is the basic component of the aerospace simulation system. At present, in the domestic aerospa...
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IPC IPC(8): B64G7/00G06T17/00G06F17/50
Inventor 汤亮石磊邓文浩涂俊峰刘云白旭辉
Owner BEIJING INST OF CONTROL ENG