System and method for testing influence of electric propulsion system for satellite on modulation of communication signal

Abstract

The system comprises a system and a method for testing an influence of an electric propulsion system for a satellite on modulation of a communication signal. The system comprises a control module, a wave control network module, a vector network analysis module, a spectrum analysis module, a data acquisition module, a transmitting antenna, a receiving antenna, a clock module and a current monitoring module. The vector network analysis module generates and transmits a radio frequency signal, the radio frequency signal is received by the receiving antenna after the radio frequency signal passes through plume fluid generated by electric propulsion, the radio frequency signal is transmitted to the vector network analysis module in order to obtain a time domain transmission coefficient, a wave control network is controlled based on the time domain transmission coefficient in order to reduce the environmental multi-path interference, and the frequency spectrum analysis module obtains a frequency spectrum of the radio frequency signal and a frequency spectrum of the modulated radio frequency signal; and the data acquisition module provides a current signal monitored by the current monitoring module to the control module. The control module carries out relation analysis on the spectral characteristics of a modulating signal and the frequency spectrum and the current of the transmittingradio frequency signal, so that the influence of the plume fluid generated in a working process of the electric propulsion system on the communication signal of the specific frequency of the satelliteis obtained.

Description

technical field [0001] The invention relates to a system and method for testing the influence of a satellite electric propulsion system on communication signal modulation, belonging to the technical field of satellite communication. Background technique [0002] With the advancement of satellite technology, electric propulsion technology has gradually matured and has begun to be applied in the field of communication satellites and deep space exploration satellites. The satellites of the domestic East 3B satellite platform and Dongwu satellite platform are equipped with electric propulsion systems and have been successfully applied. [0003] During the working process of the electric propulsion system, a plasma plume will be generated, which will cause electromagnetic interference problems to the satellite. In CN201110262611.X "Electric Propulsion System and Satellite Radiation Electromagnetic Compatibility Verification Method", and CN201110262626.6 "Electric Propulsion Syst...

AI Technical Summary

Problems solved by technology

The problems with the above method are: ① The electromagnetic compatibility verification of the electric propulsion system for the satellite or radio frequency equipment requires two processes: the electromagnetic compatibility test of the electric propulsion system and the electromagnetic compatibility test of the satellite or radio frequency equipment, and the satellite is required to participate in the test, and the cost The cost is high; ②The electromagnetic compatibility verification between the electric propulsion system and satellites or radio frequency equipment is evaluated through the working conditions of satellites and related equipment, and it is impossible to determine the specific cause of the interference, which is prone to "knowing it but not knowing why" Question; ③The above test method measures the impact of the unintentional electromagnetic radiation emission of the electric propulsion plume on the satellite or radio frequency equipment, and does not evaluate the effect between the plume directly and the satellite communication electromagnetic wave

However, this method evaluates the influence of the plume on the amplitude attenuation and time delay of electromagnetic waves. From the perspective of satellite applications, due to the margin of system design, the attenuation of electromagnetic waves by plume has little impact on the satellite system; The impact will only have a certain impact on radio frequency systems that require positioning

Images