In networked control systems (NCS), sensing and control signals between the plant and controllers are typically transmitted wirelessly. Thus, the time delay plays an important role for the stability of NCS, especially with distributed controllers. In this paper, the optimal control strategy is derived for distributed control networks with time delays. In particular, we form the optimal control ...

Networked control systems (NCS) have recently received an increasing attention from the control systems community. One of the major problems in NCS is how to model the highly nonlinear terms caused by uncertain delays. A straightforward solution is to employ polytopic approximations. In this paper we develop a novel method for creating discrete-time models of NCS based on polytopic approximatio...

Time delay plays a critical role in the performance of real-time Networked Control Systems (NCS). It can destabilise the NCS as it deteriorates the performance and stability of networked control systems. Communication networks inevitably introduce delays in NCS. Therefore, it is necessary to compensate the time delay. The time taken by the system depends upon the characteristics of the network ...

We propose a dynamic output-feedback compensator for time-stamped Networked Control Systems (NCS). The design methodology is based on the use of a polytopic with additive norm-bounded representation for the NCS. The dynamics of the proposed compensator depends on the delays induced by the network, which are supposed not to be greater than the sampling period and possible to compute from the inf...

In this paper the effects of quantization in an important class of networked control systems called model-based networked control systems (MB-NCS) are considered. The MB-NCS architecture uses an explicit model of the plant in the controller in order to reduce the network traffic, while attempting to prevent excessive performance degradation. Sufficient stability conditions for two types of stat...

An adaptive algorithm is introduced in this paper to estimate random communication time delay in Networked Control Systems (NCS). The algorithm updates an adaptive delay estimate using gradient descent method, and identifies plant parameters by a modified RLS. By using this algorithm, future control sequences are generated to compensate for the communication time delay when control signals are ...

The combination of decentralized and networked control where control loops are closed through a network is defined as Decentralized Networked Control System (DNCS). In this paper, we introduce a general framework that converts a generic decentralized control configuration of non-networked systems to the general setup of Networked Control Systems (NCS). An observer-based decentralized control me...

This paper considers the event-triggered control problem for a class of Networked Control Systems (NCS) subject to transmission delays and stochastic deception attacks. A new fuzzy weighted memory mechanism is proposed reduce network bandwidth consumption data rates. In this context, state feedback controller stabilize closed-loop NCS. Considering security NCS, randomly occurring attack model e...

Title of dissertation: Access Scheduling and Controller Design in Networked Control Systems Lei Zhang, Doctor of Philosophy, 2005 Dissertation directed by: Assistant Professor Dimitrios Hristu-Varsakelis Department of Mechanical Engineering A Networked Control System (NCS) is a control system in which the sensors and actuators are connected to a feedback controller via a shared communication me...

Model-Based Networked Control Systems (MB-NCS) use a model of the plant to compensate for the lack of information between transmission times. This results in a significant reduction of the bandwidth used for stabilizing the control system. Previously published stability results for MB-NCS assume no quantization error. In this paper quantization is introduced for MBNCS. Sufficient stability cond...