On the performability of fault-tolerant NCSs with video sensors

Abstract

Smart sensors in Networked Control Systems are increasing in abundance with Industry 4.0. The use of such smart sensors can offer various advantages to a traditional networked control system. Furthermore, the utilization of such smart sensors is more realizable specifically due to the use of networked control systems, because of the abundance of bandwidth. This paper presents a networked control system, utilizing switched Ethernet, with sensors, actuators and an intelligent controller. The system also adds a smart sensor, which processes video through an onboard camera and embedded controller. The research investigated the impact of the video sensor on the system and proposed a fault-tolerant model that studies the utilization of the sensor’s onboard controller as a backup to the system’s main controller. The model is successfully simulated using Riverbed Network Modeler. Finally, a performability analysis is conducted on the proposed model.