ABSTRACT In this paper, the modeling and performance analysis of Networked Control System (NCS) subject to random delays and packet losses are discussed. Stochastic control theory is used for handling the random time delay and packet losses. Stochastic optimal strategy for networked control system (NCS) is obtained with random delays and packet losses when the system matrices are known. A new s...

The aim of this paper is to discuss the flexibility and the performance of a multiscale wireless/wired networked control system (NCS). This NCS consists of three different types of dynamic systems (fast, medium, and slow clients) with distinct time scales. The experimental results verified the capability of the NCS to combine both the wired and wireless networks and the control capability of th...

T HE accelerated integration and convergence of communications , computing, and control over the last decade has inspired researchers and practitioners from a variety of disciplines to become interested in the emerging field of networked control systems (NCS). In general, an NCS consists of sensors, actua-tors, and controllers whose operations are distributed at different geographical locations...

In many control systems, including networked control systems, feedback information is not necessarily continuous or instantaneous, but intermittent, where the loop is closed for finite time intervals. Intermittent feedback is not uncommon in applications, but it has not been adequately studied in control theory. The aim of this work is to explore theoretically the advantages (and disadvantages)...

With the increasing complexity of modern automation systems, Networked Control Systems (NCS) gain more and more importance due to their modularity and simplified diagnosis. In NCS, plant and controller are spatially separated and the control loop is physically closed through a communication network. Communication time delay in a NCS degrades the performance and may lead to instability. In this ...

by GRAHAM W. ALLDREDGE The networked environment presents many new challenges for the design of feedback control systems. Though networked control systems (NCSs) are subject to the performance-degrading effects of both discretization and time-varying, random delay, traditional control algorithms may still suffice depending on the plant, network, and performance criteria. This thesis investigate...

The network disturbance effect can be considered as either a perturbation or as a pure time delay for the exchanged signals. The network-induced time delay is one of the main challenges when a network is inserted in the feedback loops of a control system. In this paper, our objective is to improve the behavior of a Networked Control System (NCS) by analyzing the time-delay given that the decent...

Applications of control systems on wireless networks have been widely utilized due to their mobility. However, the performances of these networked control systems (NCS) could be degraded and become unstable by network-induced delays. Existing dynamic bandwidth allocation methods for NCS assign bandwidth to each system with respect to different priorities in an ascending order. However, these NC...

The networked control system (NCS) design for continuoustime systems with probabilistic delays is discussed in this paper. The delay is assumed to follow a given probability density function. A design scheme for the observer-based output feedback controller is proposed to render the closedloop networked system exponentially mean-square stable with H∞ performance requirement. The design method i...

The stability of multi-input and multi-output networked control systems (MIMO NCS) is considered in this paper. A less conservative delay dependent stability criterion for MIMO NCS is proposed in terms of linear matrix inequality. The new result is obtained by taking the relationship between the delay upper bounds into account in Lyapunov functional, estimating the upper bound of the derivative...