81 Abstract—According to the fact that network is a class of discrete event system. Discrete-event simulation tool SimEvents is used to build network dynamic model so as to simulate network-induced delay and packet dropout in networked control systems. The concept of round trip time is introduced to estimate network-induced delay, which is compensated by Smith compensator. By using the control ...

High-speed communication networks are characterized by large bandwidth-delay products. This may have an adverse impact on the stability of closed-loop congestion control algorithms. In this paper, classical control theory and Smith's principle are proposed as key tools for designing an e!ective and simple congestion control law for high-speed data networks. Mathematical analysis shows that the ...

Abstract In this paper, intelligent control approaches are introduced to overcome the problems highlighted in the standard Smith predictor. First, in order to overcome the steady state error in the Integrator Plus Dead Time (IPDT) process control due to disturbance loading, a new fuzzy logic control based SP is developed by intentionally introducing a model mismatch to improve the system perfor...

Abstract: A direct adaptive output-feedback controller for the stable plants with input time delay is proposed in this paper. The controller is based on the model reference adaptive control approach and a Smith-predictor like filter is utilized to handle the time delay. The control algorithm is applied as a part of the artificial pancreas, where the controller design is based on the simplified ...

Recent interest in networked control systems (NCS) has instigated research in various areas of both communication networks and control. The analysis of NCS has often been performed either from the network, or the control point of view and not many papers exist were the analysis of both is done in the same context. Here a simple overall analysis is presented. In the paper the procedure of obtain...

Teleoperation systems are expected to play an important role in daily healthcare and wellness applications. Time-delays typically cause stability and performance problems in these systems. As a remedy for such problems in position-error based bilateral teleoperations, a control algorithm is proposed which is derived as a robust modification of a Smith predictor structure for time-delay compensa...

The major difficulties in designing a controller for the fluidized bed combustor for sewage sludge result from the following reasons: 1) The dynamical behavior of the plant is highly unknown and the experimental data only render a coarse model; 2) the combustion process shows large time-delay; and 3) the plant model is a stiff differential equation because the parameter values among the subsyst...

In this paper, a novel structure for a communication disturbance observer in teleoperation systems is proposed to achieve robust stability. A time delay compensation method based on the concept of network disturbance and a communication disturbance observer (CDOB) has been proposed in past research. Unlike model-based approaches, it works without a time delay model. Therefore, it can be impleme...

This paper considers systems whose transfer functions take the form of a strictly proper rational function times a delay. A closed form expression is presented for the controller which is optimally robust with respect to perturbations measured in the gap metric. The formula allows the H 1 loop-shaping procedure of Glover-McFarlane to be carried out explicitly for this class of systems without t...