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A Design Method of Flat Track for Rocket Sled Test

A design method and rocket sled technology, applied in the field of rocket sled test track construction, can solve the problems of irregular changes in the earth's gravity field and uneven material distribution, and achieve the effects of avoiding energy waste, saving manpower, and ensuring straightness

Active Publication Date: 2017-01-18
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The material distribution inside the earth is very uneven, so the change of the earth's gravitational field is also irregular, and the geoid cannot be described by a simple mathematical equation

Method used

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  • A Design Method of Flat Track for Rocket Sled Test
  • A Design Method of Flat Track for Rocket Sled Test
  • A Design Method of Flat Track for Rocket Sled Test

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Embodiment 1

[0081] At the time of design, the orbit is obtained in the launch point orbit coordinate system as attached Figure 5 As shown, after the conversion of the pitch angle β, as shown in the attached Image 6 As shown, and then transformed by the yaw angle γ, as shown in the attached Figure 7 As shown, according to the longitude, latitude and height data of the initial point, the orbit in the WGS-84 coordinate system is obtained as Figure 8 shown.

[0082] In order to verify the correctness and design accuracy of the orbit design method, high-precision DGPS was used as the external means to carry out the test on a certain rocket skid track. The schematic diagram of the measurement results is shown in the attached Figure 9 shown. In the figure, the thin line is the theoretical design orbit, and the thick line is the in-orbit DGPS measurement value. It can be seen that the theoretical design value and the measured value approximately coincide.

[0083] Using the method of co...

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Abstract

The invention discloses a flat track design method of a rocket sled test. The method comprises the following steps: determining the start point P0 of a track after selecting the lowest point and direction of the track; obtaining the track coordinate under a WGS-84 coordinate system through changing the coordinates of a yaw angle gamma and a pitching angle beta so as to provide continuous geographic information data for track construction. The method provides a brand-new design idea for domestic track construction of a rocket sled; the finished track is not affected by the earth curvature and is kept straight absolutely; thus, manpower, financial and material resources are farthest saved; and greater potential applications and theoretical basis are provided for the track construction of the rocket sled test.

Description

technical field [0001] The invention relates to a design method for a rocket sled test straight track, in particular to a design method for a rocket sled test track with long distance and high straightness, which can be used in the field of rocket sled test track construction. Background technique [0002] Before the inertial measurement system can carry out the rocket sled test, it is necessary to know the relevant parameters of the orbital operation. The test track is directly laid on the surface of the earth. Therefore, whether it is inertial navigation or GPS, the establishment and solution of positioning model equations, etc., directly or indirectly use the geometric shape of the earth and its gravity field parameters. [0003] The earth's surface is undulating and irregular, and it is not an ideal ellipsoid. The shape of the earth usually refers to the physical and mathematical surface of the earth. The physical surface of the Earth is objective, the interface betwee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 魏宗康段宇鹏刘璠
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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