Neural-Network-Based Adaptive Singularity-Free Fixed-Time Attitude Tracking Control for Spacecrafts

In this article, a neural-network-based adaptive fixed-time control scheme is proposed for the attitude tracking of uncertain rigid spacecrafts. A novel singularity-free fixed-time switching function is presented with the directly nonsingular property, and by introducing an auxiliary function to com...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on cybernetics 2021-10, Vol.51 (10), p.5032-5045
Main Authors: Chen, Qiang, Xie, Shuzong, He, Xiongxiong
Format: Article
Language:English
Subjects:
Actuators
Adaptive control
Angular velocity
Attitude control
attitude tracking
Continuity (mathematics)
Control stability
Control systems design
Controllers
Convergence
Feedback control
fixed-time convergence
Materials requirements planning
neural network (NN)
Neural networks
Singularities
Space vehicles
Switches
Switching
Tracking control
Tracking errors
Velocity errors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this article, a neural-network-based adaptive fixed-time control scheme is proposed for the attitude tracking of uncertain rigid spacecrafts. A novel singularity-free fixed-time switching function is presented with the directly nonsingular property, and by introducing an auxiliary function to complete the switching function in the controller design process, the potential singularity problem caused by the inverse of the error-related matrix could be avoided. Then, an adaptive neural controller is developed to guarantee that the attitude tracking error and angular velocity error can both converge into the neighborhood of the equilibrium within a fixed time. With the proposed control scheme, no piecewise continuous functions are required any more in the controller design to avoid the singularity, and the fixed-time stability of the entire closed-loop system in the reaching phase and sliding phase is analyzed with a rigorous theoretical proof. Comparative simulations are given to show the effectiveness and superiority of the proposed scheme.
ISSN:2168-2267
2168-2275
DOI:10.1109/TCYB.2020.3024672