A Tracking Control Method for the Flying Segment of a Small Astrophysical Probe Based on Iterative Learning Control

Abstract

The invention discloses a small celestial body detector orbit tracking control method based on iterative learning control, which establishes a small celestial body dynamic model under external disturbance and unmodeled disturbance; designs a nonlinear disturbance observer to estimate the impact on the detector External disturbances, and their dynamic characteristics are compensated to the controller; design feedback controllers to suppress non-periodic disturbances in the process of flying around; design iterative learning controllers to suppress periodic disturbances in the process of flying around; the output of the controller and the output of the disturbance observer Combined with the input to the pseudo-rate modulator, a tuning oscillation pulse is generated, and the thyristor is turned on after receiving the trigger signal, inducing the main discharge of the thruster, and generating thrust on the roll axis, yaw axis, and pitch axis. The control method disclosed by the invention enables the small celestial body detector to improve the orbit tracking control accuracy and system robustness of the orbit around the flying section under the unknown disturbance.

Description

technical field [0001] The invention adopts an iterative learning control-based orbit tracking control method for a small celestial body detector around a flying section, and belongs to the technical field of deep space exploration. Background technique [0002] Under the background of promoting the innovation and development of aerospace technology and building a space power, the detection of small celestial bodies can not only explore the origin and evolution of the solar system, the origin of life, and the origin and evolution of celestial bodies, but also carry out research on the defense of dangerous near-Earth asteroids and reduce impacts. Planetary risk is significant. The detection of the small celestial body's orbiting section can not only provide prior information for further detection such as landing, but also can most effectively and completely and accurately understand the small celestial body's topography, gravitational environment and other information. [00...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an iterative learning control based orbit tracking control method for small astronomical detectors around the flight section, which solves the robustness of the detector orbit tracking control caused by various external unknown disturbances in the orbiting section of the small astronomical detectors in the prior art poor problem

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