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There are increasing concerns about the protection of the Networked Control Systems (NCS) security because of the growing threats of cyber attacks. However, security requirements often conflict with other performance requirements, like realtime dynamic performance due to limited system resources. We investigate the problem of the trade-off between NCS security and the NCS real-time performance in...
Networked Control Systems (NCS) is a fast growing technology that integrates distributed sensors, actuators, and computing processors over a communication network for a vast amount of applications. However, the NCS can be vulnerable to various network attacks when the network used is insecure (e.g., Internet). Thus, secure NCS need to have embedded security mechanism to ensure its security operating...
This paper presents a new controller design method for networked DC motor system in the presence of time delays and packet losses. The sufficient condition under which the closed-loop system is asymptotically stable and the necessary condition under which the networked DC motor has zero steady-state tracking error are derived. Based on the obtained conditions, an output tracking controller design...
Network-control-systems (NCS) have been gaining popularity due to their high potential in widespread applications and becoming realizable due to the rapid advancements in embedded systems, wireless communication technologies. This paper addresses the issue of NCS information security as well its time-sensitive performance and their trade-off. A PI controller implemented on a network to control the...
This paper presents a novel control methodology for networked DC motor speed control system. A discrete-time switch system is used to model the closed-loop system with time delays and packet losses, and the stability conditions are derived in terms of linear matrix inequalities (LMIs). Based on the obtained stability conditions, a two-step controller synthesis method is proposed. The first step is...
Remote supervisory control system is one type of network control systems (NCS) to perform supervisory control via communication networks. There can be information loss when information is transmitted from the remote plants to the supervisors due to the additional constraints (e.g., bandwidth limitations) by using communication networks as media. In part I of these papers, a sampling rate scheduling...
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