Deep space exploration large-caliber antenna calibration ground test system based on suspension device

Abstract

The invention discloses a deep space exploration large-caliber antenna calibration ground test system based on suspension device. The deep space exploration large-caliber antenna calibration ground test system based on the suspension device comprises onboard equipment and ground equipment; the onboard equipment comprises a large-caliber antenna, an onboard low gain receiving antenna, antenna driving control equipment and onboard communication equipment; and the ground equipment comprises the suspension device, a ground signal simulator, a ground low-gain transmitting antenna, a theodolite anda frequency spectrograph. By using the suspension device, gravity force effects of the large-caliber antenna in a static state and a driving state are effectively balanced; by using a ground signal simulation source, the low-gain transmitting antenna and the large-caliber antenna, in-orbit communication state to the ground is simulated; through reasonable position layout, the signal intensity of the large-caliber antenna is inversely calculated by using the low-gain receiving antenna; by using the theodolite, the pointing accuracy of a mechanical shaft of the large-caliber antenna is calibrated, and the radio frequency calibration accuracy of the large-caliber antenna is inverted. According to the deep space exploration large-caliber antenna calibration ground test system based on the suspension device, the in-orbit calibration process of the large-caliber antenna can be effectively simulated, and the reasonability and the effectiveness of the in-orbit calibration method are guaranteed.

Description

technical field [0001] The invention relates to the field of ground tests of deep space detectors, in particular to a ground test system for calibration of large-diameter antennas for deep space detection based on a hanging device. Background technique [0002] A deep space probe is an aircraft that detects celestial bodies such as stars and planets beyond the earth and the moon. Since deep space probes are far away from the earth, large-diameter antennas are required to achieve effective communication with the earth. After the antenna diameter is increased, in order to achieve high-gain communication with the earth, its beam angle is small and needs to be within ±0.5°. If the antenna is calibrated on-orbit, the ground pointing can reach ±0.1°, and the gain can be increased by 3dB. Aperture antennas are essential to Earth pointing accuracy. [0003] The pointing errors of large-aperture antennas for deep space probes mainly include: deployment pointing errors, thermal defo...

AI Technical Summary

Problems solved by technology

Part of the error can be reduced through ground calibration, but due to the microgravity environment in the ground test, its calibration accuracy is difficult to accurately measure

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