Adaptive Fault-Tolerant Attitude-Tracking Control of Spacecraft With Quantized Control Torque

Zhi Yuan,Xiuming Yao,Lina Wu

doi:10.1109/access.2020.3045017

Abstract

In this article, the problem of fault-tolerant attitude-tracking control of spacecraft with quantized control torque is addressed. Actuator faults/failures, an uncertain inertia matrix and unknown disturbances are considered in the attitude controller design of the spacecraft. A dynamical quantization strategy is developed to quantize the signals of the control torque, which can reduce the data transmission rate. An adaptive fault-tolerant controller based on sliding mode techniques is constructed to address the impacts of the actuator faults/failures, quantization errors, inertia matrix uncertainties and unknown disturbances. The developed control strategy with a quantizer can ensure that the entire closed-loop system is asymptotically convergent and achieves satisfactory attitude-tracking performance. Finally, simulation results are provided to show the effectiveness of the proposed method.

Highlights

The attitude-tracking problem of a spacecraft system is a challenging issue involving highly coupled nonlinearity, an uncertainty inertia matrix and external system disturbances [1,2]
In the past few decades, this problem has attracted the attention of many researchers, and various nonlinear approaches, e.g., sliding mode control (SMC), backstepping control and disturbance rejection adaptive control, have been developed to address it
This paper addresses the fault-tolerant control (FTC) problem for spacecraft attitude-tracking control systems with multiplicative and additive actuator faults, an uncertain inertia matrix, unknown external disturbances and limited communication bandwidth

Summary

Introduction

The attitude-tracking problem of a spacecraft system is a challenging issue involving highly coupled nonlinearity, an uncertainty inertia matrix and external system disturbances [1,2]. In the past few decades, this problem has attracted the attention of many researchers, and various nonlinear approaches, e.g., sliding mode control (SMC), backstepping control and disturbance rejection adaptive control, have been developed to address it. Among these methods, SMC is known to provide a powerful tool against matched parameter uncertainties and external disturbances [3,4,5,6,7]. Various control techniques such as robust control, SMC, adaptive model reference control and optimal control have been employed to design fault-tolerant controllers to ensure that spacecraft attitude control systems can maintain acceptable performance [11,12,13,14,15,16,17,18]

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Results

Conclusion