Robust Fault Diagnosis for Discrete-Time Switched System with Unknown State Delays Subject to Component Faults

Abstract

This paper investigates the problems of fault detection and diagnosis in a class of discrete-time switched systems with unknown state delay against component faults. The component fault, also called the multiplicative fault or loss of actuator effectiveness, is a common type of operation fault for switched systems, which has been paid more attention. In this paper, the learning observers (LOs) technology are proposed to reconstruct both the system state and component faults. The proposed LOs technique is also extended to the system with unknown time delay and external disturbance. The sufficient conditions for the convergence of the output of LOs and the uniformly ultimately boundedness of the reconstructed errors are proved by the switched Lyapunov function and H ∞ technique. The proposed fault reconstruction strategy has certain tolerance for fault types, which is effective for both slow and fast time-varying faults by adjusting the iteration step size. In the simulation parts, three kinds of fault signals are taken into consideration to verify the effectiveness and robustness of the proposed method.

Reliable Resource Allocation and Management for IoT Transportation Using Fog Computing

“…Latency and energy consumption are key performance evaluation parameters for the proposed research strategy. In a transportation IoT environment [29][30][31][32][33][34][35][36][37], minimizing latency and reducing energy consumption are critical aspects.…”

“…Latency: Refers to the delay that occurs in a system during the computation of a task. It is typically calculated by adding the processing delay and the transmission delay [29,30]. Latency is measured in milliseconds (MS), and its formula is given by Equation (1).…”

“…Energy consumption: Refers to the total power utilized by all devices in a system, including processing, sensing, and transmitting devices [29][30][31][32][33][34][35][36][37]. It is typically measured in joules and can be calculated using the following equation (Equation ( 2)).…”