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The problem of variable structure guaranteed cost control for discrete uncertain networked systems with time delay has been considered in this paper. Based on the Lyapunov stability theorem, by introducing a discrete compensator, a novel sliding mode manifold that can compensate time delay has been designed. Then, by using linear matrix inequalities approach, a guaranteed cost controller is designed...
In this paper, a model-based event-triggered control law is adopted to reduce communication traffic in networked control systems. In this model-based control system, a nominal model of system plant is used to estimate the system state between two sampling instants. By simultaneously considering bounded system noise and bounded network delay, a mixed event-triggering mechanism is proposed to stabilize...
This paper considers a network of autonomous micro aerial vehicles (MAVs) cooperatively searching for multiple stationary targets. The objective is to minimize the search time while considering sensing and communication limitations. We derive limits for the required number of sensor observations considering false alarms and misdetections, to declare the existence or absence of a target. To minimize...
The paper studies the problem of constructing assurance cases for embedded control systems developed using a model-based approach. Assurance cases aim to provide a convincing argument that the system delivers certain guarantees, based on the evidence obtained during the design and evaluation of the system. We suggest an argument strategy centered around properties of models used in the development...
A hybrid control system with Case Based Reasoning (CBR) procedure is considered. It is intended for complex industrial plants in abnormal and fault situations where the conventional control systems cannot work autonomously. CBR systems allow capture and use a specific experience by Case Base (CB) creation, similarity assessment, case adaptation and learning new cases. Some new results are incorporated...
A hybrid system is a complex system which consists of continuous and discrete dynamics, and it displays discrete behaviors, in addition to continuous behaviors. Due to mode changes in a hybrid system, the employment of constant threshold will cause false alarm or missed detection. The cause is that mode changes lead to different composition of component uncertainties. In this paper, in view of component...
This paper develops a multivariable model reference adaptive control (MRAC) scheme for multi-input multi-output LTI systems with parameterized sensor uncertainties. Adaptive compensation of sensor uncertainties is incorporated with a feedback control law. An sensor uncertainty compensator is designed to estimate the actual system signals which are not available because of sensor uncertainties, and...
Considerable attentions have been devoted recently to active vibration control using intelligent materials as sensors/actuators. This paper presents results on active control schemes for vibration suppression of flexible cantilever beam with bonded piezoelectric sensors and actuators. State equations which the generalized modal coordinates as variables are built. With the piezoelectric elements are...
For the uncertain NCS with stochastic network delay less than one period, a sort of RBFNN-DSMC algorithm combining discrete sliding mode control and RBF neural network is presented. In view of the coupling influence of time-variable delay and plant model error as well as exterior disturbance, RBFNN is used to approach the equivalent disturbance online and output assistant control quantity so as to...
This paper presents a new method based on the algebraic Riccati equation for designing robust reliable Hinfin control laws for plants with structured uncertainty. The design method consists of incorporating information on the plant uncertainty into the algebraic Riccati equations(ARE) used for nominal Hinfin disturbance-rejection designs. The development of the reliable Hinfin controllers assumes...
In recent years, there has been increasing interest in controlling systems over communication networks because communication networks are among the fastest-growing areas in engineering. Networked control system (NCS) is a feedback control system wherein the control loops are closed through a computer network. Such systems offer advantages such as lower installation costs, increased flexibility and...
A fault-tolerant control strategy based on a robust model-based approach is addressed in order to design and implement a supervisory system. The approach considers the application of a robust control technique to integrate the control design and the fault diagnosis in the same framework. A model-based approach is used to estimate the system's state variables and to synthesize the robust controller...
The Office of Naval Research (ONR) program in decision and control systems has two major components. The first is in the area of centralized control and responds to Naval needs in vehicle and weapon control. The second is in large scale systems and is concerned with naval applications in surveillance, command and control, and communications. The research is strongly problem motivated but spans both...
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