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Optimization implementation method of Mars rover for surround antenna pointing algorithm

An optimization method and antenna pointing technology, applied in design optimization/simulation, extraterrestrial vehicles, special data processing applications, etc., can solve problems such as inability to meet real-time requirements, weak space-borne computer capabilities, and long computing time

Active Publication Date: 2021-02-05
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

For the autonomous pointing requirements of the orbiter, if the calculation method of the ground computer is directly used, due to the weak capability of the on-board computer, it takes a long time to calculate and cannot meet the real-time requirements. Therefore, it is necessary to propose a Mars rover-to-orbiter An on-board optimization calculation method performed autonomously by antennas

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  • Optimization implementation method of Mars rover for surround antenna pointing algorithm
  • Optimization implementation method of Mars rover for surround antenna pointing algorithm
  • Optimization implementation method of Mars rover for surround antenna pointing algorithm

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Embodiment Construction

[0103] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0104] For the convenience of the following description, the related conventions of the Mars rover and the directional antenna are explained.

[0105] Such as figure 1 As shown, the Mars rover control body coordinate system OB-XBYBZB is defined: the origin OB is at the geometric center of the Mars rover structure floor, the OBXB axis points to the direction of the front of the vehicle, the OBZB axis is perpendicular to the bottom plate and points to the fire surface, and the OBYB axis is perpendicular to the OBXB axis and OBZB axis. The axes form a right-handed Cartesian coordinate system.

[0106] The directional antenna is installed at the rear of the rover and is driven by a two-axis mechanism: shaft A and shaft B. The two shafts are perpendicular to each other. When the A shaft rotates, it drives the B shaft to rotate, and the B shaft does not affect ...

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Abstract

The invention discloses an optimization implementation method of a Mars rover for a surround antenna pointing algorithm, which is characterized in that the longitude and latitude heights and attitudeangles of a Mars rover in two calculation processes are completely the same during antenna pointing calculation in the same round of antenna control process, so that a plurality of intermediate variables exist; after the first calculation, the first calculation result can be directly used in the residual control process; in addition, the Mars rover antenna installation deviation matrix is completely fixed in the whole satellite life period, so that the method utilizes the characteristic to calculate the conversion matrix from the antenna system to the satellite system in advance, and stores the calculation result in the satellite-borne memory; in the antenna pointing calculation process, calculation is not needed in the calculation step from an antenna system to a satellite body system conversion matrix, but matrix data in a memory is directly read, and the calculation amount of a satellite-borne processor is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of space-borne antennas, and in particular relates to an optimization realization method of a Mars rover-to-circulator antenna pointing algorithm. Background technique [0002] China launched a Mars rover in 2020 to inspect the surface of Mars. The rover is equipped with a high-gain, narrow-beam directional antenna to communicate with the Mars orbiter. The autonomous pointing of the directional antenna to the circulator is a key process, which directly affects the reliability and accuracy of data transmission. This process needs to consider the influence of multiple factors such as time, ephemeris, position of the fire surface, attitude of the Mars rover, and antenna installation error. In China's Chang'e-3 lunar exploration mission, engineers proposed a method for planning the pointing of the directional antenna of the lunar rover to the lunar orbiter. After the ground planning is completed, commands are s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20B64G1/16
CPCG06F30/20B64G1/16
Inventor 郭坚朱剑冰彭松张红军赵蕾朱玛兰天韦涌泉杨小瑞王翠莲周东张建利温博
Owner BEIJING INST OF SPACECRAFT SYST ENG
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