On-orbit modal identification system and method for satellite solar cells

Abstract

The invention provides an on-orbit modal identification system and method for satellite solar cells. The on-orbit modal identification system for satellite solar cells comprises a pulse excitation module, a signal acquisition module, a satellite on-orbit vibration monitoring and modal identification module, a data transmission module and a data processing module, wherein the signal acquisition module includes a plurality of sensors which are arranged on a satellite solar cell array, and is used for acquisition of pulse response signals at each measuring point on the satellite solar cell array; the data transmission module is used for transmitting the pulse response signals at each measuring point to the ground; the satellite on-orbit vibration monitoring and modal identification module is used for receiving and monitoring the pulse response signals at each measuring point; and the data processing module is used for constructing a characteristic system state equation according to the pulse response signals at each measuring point, and acquiring solar cell array on-orbit modal parameters by constructing a Hankel matrix. The on-orbit modal identification method for satellite solar cells is high in reliability, and can solve the problem that modal frequency measurement on a large array plane solar cell array ground is not accurate.

Description

technical field [0001] The invention relates to a satellite solar cell array, in particular to an on-orbit mode identification system and method for a satellite solar cell array. Background technique [0002] Due to the existence of the microgravity environment in space, it is difficult to maintain the configuration of the large-array solar array system on the satellite on the ground, and the structure and shape of the solar array will change due to the alternating cold and heat, vibration coupling and other reasons in space. Therefore, it is very important to track its structure in space in real time and to identify its dynamic performance in real time. However, the theoretical research and application of low-frequency dense modes of solar cell arrays in my country are still at the initial stage. , a little simulation research work on the identification algorithm has been carried out, but the ground research is not enough. [0003] At present, the modal parameter identificat...

AI Technical Summary

Problems solved by technology

[0004] 1) Limited by ground test conditions, it is impossible to accurately and reliably display the on-orbit status of the solar cell array, resulting in high or low reliability in the design process of the whole star, making the parameters in the design process inconsistent with the actual situation in orbit; making the solar cell array Vibration coupling with the mode of the whole star leads to a decrease in attitude stability, which affects the load and the work and life of the whole star, and there are reliability problems, weak links and hidden dangers of accidents;

[0005] 2) Lack of high-precision, low-frequency dense mode identification methods

Images