Method of orbit transfer control after debris capture method based on auto-disturbance rejection control technology

Abstract

The invention proposes a method of orbit transfer control after debris capture based on the auto-disturbance rejection control technology, and belongs to the field of orbit transfer control. The technical scheme comprises a first step of decoupling, according to a motion equation of a post-capture combined system, each channel of the combined system into a single input-single output sub-control system by introducing a "virtual control amount" U; a second step of designing a non-linear dynamic compensation control rate according to each sub system control model; a third step of designing an auto-disturbance rejection controller for each channel, including a tracking differentiator, an extended state observer, and a nonlinear state error feedback control rate; and a fourth step of obtaining, according to the "virtual control amount" of each channel, the required actual control amount. The most prominent advantage of the invention is to overcome the uncertainties of the post-capture combined system model and external disturbance by using the prominent feature of "real-time estimation and compensation of uncertain factors" of the auto-disturbance rejection technology.

Description

technical field [0001] The invention belongs to the field of orbit transfer control, and specifically discloses a method for controlling orbit transfer after debris capture based on active disturbance rejection control technology. Background technique [0002] In recent years, with the enhancement of economic strength and the development of aerospace technology, human exploration activities in space have also increased dramatically. Space debris refers to space objects that are distributed in the earth's orbit and have lost their functions. Space debris has been around since the first artificial satellite was successfully launched into space. However, it took several decades before the threat of space debris to orbiting spacecraft was taken seriously. So far, the US space detection platform has detected about 17,000 orbiting objects, but only 1,200 are normal working satellites or other spacecraft. If it is not controlled, with the continuation of human space activities, ...

AI Technical Summary

Problems solved by technology

The difference from spacecraft orbit transfer is that the post-capture combination system not only has the characteristics of nonlinearity, multiple input and multiple output, time-varying, high-order, etc., but also has uncertainties, so it is difficult to apply the traditional " modern control theory" to control it

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