Method for designing pointing of antenna of deep space probe

Abstract

The invention provides a method for designing pointing of an antenna of a deep space probe. The method particularly comprises the steps that firstly, the expression (please see the formula in the specification) of the probe-geocentre position vector on a mechanical coordinate system is calculated; secondly, according to the V2m, the included angle theta between the full-direction antenna direction vector and a probe-control station is calculated; thirdly, when the included angle theta is larger than the maximum allowable angle gamma, the probe rotates around the +x axis of a mechanical coordinate system, and gains of the rotated full-direction antenna meet the requirements of an upper link and a down link. According to the method, the antenna rotates around the counterglow directional axis by a certain angle, and therefore continuity of the measuring and control process is ensured; the antenna using operation caused by ground switching is reduced; the ground operation complexity is reduced; and meanwhile, the antenna is located in the section with the large gains, and the link channel allowance is improved.

Description

technical field [0001] The invention relates to the technical field of deep space detection, in particular to a method for designing the antenna pointing of a deep space detector. Background technique [0002] During the earth-moon transfer and the flight around the moon, the deep space probe usually adopts a fixed axis of the mechanical system (defined as +X axis below) to orient itself to the sun in the normal cruising mode and in the state of not imaging the moon, so as to ensure the solar wing method The line direction is parallel to the sunlight direction. In this case, if the installation orientation of the omnidirectional TT&C antenna can be parallel to the ±X-axis, whether the detector rotates around the X-axis will not affect the angle between the antenna axis and the detector-TTCS, so that the cruising flight of the detector will not be affected. There are no constraints required for poses. Under such conditions, the detector will adopt a slow-spin attitude, whic...

AI Technical Summary

Problems solved by technology

Due to the narrow beam of the directional antenna, considering the orbit changes of the earth and the moon, it is generally necessary to use a two-axis rotating tracking mechanism to achieve continuous long-term pointing to the earth and the moon, but the use of a rotating mechanism will increase weight and power consumption, and pointing control computationally complex issues

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