This paper presents a Lyapunov function based control strategy for networked systems (NCS) affected by variable time delays and data loss. A special focus is put on the reduction of computational complexity. specific buffering mechanism defined first, such that it adds an additional delay up to one sampling period. The resulting buffered NCS can then be formulated as switched system which leads...

T INT raditional centralized control architectures where a supervisory controller directly interfaces in a point-to-point fashion with all sensors and actuators in the system have been successfully implemented in the past. They are generally feasible when a controller interfaces with small number of sensors and actuators and requires short wiring to them. However, it is often difficult to add, ...

This paper deals with the exact state sensitivity calculation required in the moving horizon estimator (MHE) for nonlinear networked control systems (NCS) presented in [4]. This NCS-MHE is capable of dealing with the network induced imperfections by formulating the estimation problem as a suitable optimization problem within a moving horizon framework. The resulting nonlinear program (NLP) can ...

Dual switching linear systems are systems with piecewise linear dynamics governed by two distinct external switching signals. In this paper one switching signal is stochastic and modeled as a time-homogeneous Markov chain, and the second one is assumed to be a control signal taking values in a finite set. This situation arises, for instance, in multi-loop networked control systems (NCS) with li...

Defense Computer Systems developed and maintained over the years has resulted in thousands of disparate, compartmented, focused, and mission driven systems that are utilized daily for deliberate and crisis mission planning activities. The defense acquisition community is responsible for the development and sustainment of these systems over the course of its systems engineering lifecycle from co...

Many Networked Control Systems (NCS) comprise several control loops that are closed over a network of computation nodes. In those systems, periodic, sporadic and non-periodic packets share the network bandwidth, complex timing behavior and communication lead to delay and jitter, which both degrade the control performance. That is to say the performance of NCS is determined not only by control a...

This paper investigates bandwidth allocation and scheduling of networked control systems (NCSs) with nonlinear-programming techniques. The bandwidth utilization (BU) is defined in terms of sampling frequency. An exponential and a quadratic approximation are formulated to describe system performance versus the sampling frequencies. The optimal sampling frequencies are obtained by solving the app...

This paper studies the output-feedback stabilization problem for a class of networked control systems (NCSs) with a Markovian jump linear plant. By considering the time delays from the sensor to the controller and from the controller to the actuator, the closed-loop NCS is modeled as a system with three kinds of jumping modes. The sufficient conditions for the stochastic stability are establish...

Delays and packet losses are undesirable from a control system perspective as they tend to adversely affect performance. Networked Control Systems (NCSs) are a class of control systems wherein control components exchange information using a shared communication channel. Delays and packet losses in the communication channels are usually random, thereby making the analysis and design of control l...