Spacecraft ACS on-orbit reconstruction method oriented to multi-task multi-index optimization constraints

Abstract

The invention discloses a spacecraft ACS on-orbit reconstruction method oriented to multi-task multi-index optimization constraints, and belongs to the technical field of spacecraft attitude control.According to the method, for a spacecraft with on-orbit time relevant multi-task constraint, the state and the motion under the multi-task constraint are defined, a utility function about the state-motion is designed and a performance index function is determined, and then an optimal reconstruction strategy in the form of the HJB equation is obtained. Aiming at the problem that the HJB equation isdifficult to solve accurately, an approximate solution method based on the BOADP is provided, the task network and the energy consumption network are designed for estimating two performance index functions, and the convergence of neural network estimation errors is achieved through an iterative learning algorithm, so that an approximate solution of the HJB equation is achieved, and then an optimal reconstruction strategy is obtained, and the maximization of the task earnings is achieved by controlling the energy consumption as few as possible. According to the invention, the multi-task completion capability and the fault response capability of the spacecraft are improved.

Description

technical field [0001] The invention discloses a spacecraft attitude control system (Attitude Control System, ACS) on-orbit reconfiguration method oriented to multi-task and multi-index optimization constraints, and belongs to the technical field of spacecraft attitude control. Background technique [0002] Once an in-orbit spacecraft fails, even a failure of only a few minutes or ten minutes may lead to the failure of the entire mission. Because the spacecraft is far away from the ground, ground measurement and control personnel are often unable to deal with failures in time, and the spacecraft should have the ability to autonomously reconfigure on-orbit. The current reconfiguration control methods mainly focus on the design of fault-tolerant controllers, and achieve system stability after faults through active fault tolerance or passive fault tolerance. However, active or passive fault tolerance does not consider multi-task constraints, and the reconfigured control system...

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Problems solved by technology

[0005] The purpose of the invention of the present invention is to address the deficiencies in the above-mentioned background technology, and provide a spacecraft ACS on-orbit reconstruction method oriented to multi-task and multi-index optimization constraints, which incorporates multi-task constraints into the design of utility functions and performance index functions. Find the optimal reconfiguration decision under the following conditions to obtain the maximum task benefit with as little control energy consumption as possible, and solve the technical problem that the reconfigured control system of the existing reconfiguration method cannot guarantee to meet the task execution requirements and cause the task benefit to decline

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