Observer-based event-triggered output feedback control for fractional-order cyber–physical systems subject to stochastic network attacks

• Published in: ISA transactions Vol. 104; pp. 15 - 25
• Main Authors: Xiong, Menghui, Tan, Yushun, Du, Dongsheng, Zhang, Baoyong, Fei, Shumin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2020
• Subjects: Event-triggered scheme; Fractional-order cyber–physical systems; Observer-based output feedback control; Stochastic network attacks; Fractional-order cyber–physical systems; Stochastic network attacks; Event-triggered scheme; Observer-based output feedback control
• ISSN: 0019-0578; 1879-2022; 1879-2022
• DOI: 10.1016/j.isatra.2019.11.040

This paper is engaged in investigating the observer-based event-triggered output feedback control issue for fractional-order cyber–physical systems with stochastic network attacks, where the order scale of the fractional derivative used is 0<α<1. An event-triggered scheme (ETS) with output-independent threshold is proposed to renew the observer input so as to reduce the redundant data communications. Considering the effects of the ETS and network attacks, a novel closed-loop fractional-order control system model is constructed. By making use of fractional-order Lyapunov indirect approach, sufficient conditions that can insure the global stochastic asymptotic stability of the established closed-loop control system are obtained. Moreover, according to the singular value decomposition (SVD) of matrix, the co-design of the gains of the desired observer and controller is addressed by finding the solution of the linear matrix inequalities (LMIs). Finally, a numerical example and a diesel engine control system are provided to validate the feasibility of the adopted observer-based control method. •A simplified ETS is proposed for fractional-order CPSs.•A fractional-order state observer model is constructed by taking the ETS and network attacks into consideration.•The observer-based event-triggered output feedback control problem is firstly considered for fractional-order CPSs with network attacks.•A new sufficient condition for the stability analysis of fractional-order CPSs is obtained, and the gains of the observer and controller are also co-designed.