Output Feedback Resilient Secure Control for Spacecraft Dual Quaternion Systems With DoS Attacks

This paper investigates the output feedback resilient secure tracking control problem for spacecraft attitude-orbit integrated system with denial-of-service (DoS) attacks on sensor. This system is characterized as a multi-dimensional complex plant that integrates six degrees-of-freedom, coupling dynamics, and complex nonlinearities. Owing to the existence of network communications, spacecraft output feedback control system displays vulnerability to DoS attacks. Some existing results require the rigorous assumption of the reliable system output signal, in which the sensor signal excludes secure communication burden. Based on dual quaternion concepts, the spacecraft relative attitude-orbit coupled dynamics subject to periodic DoS attacks is established, explicitly incorporating the attack schedule into the system. A resilient secure dual quaternion observer is designed to estimate unknown states. Then a recursive scheme is employed to design the resilient secure control law, the uniform ultimate boundedness of the closed-loop system is formally proven through rigorous Lyapunov analysis, and the secure parameter constraints are derived by the joint analysis of different attack periods. Finally, the numerical simulation is presented to verify the effectiveness of the proposed scheme.