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It is well known that control of PDEs with input delay is just opening up for research. This paper presents boundary control design and stabilization for a reaction-diffusion PDE with diffusion coefficients depending on space variable and input time delay. The control design involves an interesting structure of two interconnected PDEs to transfer the input time delay into a space extension. And the...
It is a difficult problem to build the aeroengine model. And it is hard to meet aeroengine control demand by traditional methods. So according these problems, aeroengine models were built including “little deflection” model and “large deflection” models. A fuzzy controller was designed which had the parts of parameter adjustment control and smith forecast and compensation control. The simulation of...
The research and application of structural control in civil engineering have made a great progress during the development of last several decades. Time delay phenomenon that arises unavoidable regarding active control, are still the focus of study of structure control. Time delay may not only degrade the performance of the control system, in severe case will cause system instability, control divergence...
This paper considers guaranteed cost control problem for systems with saturating actuators and input delays. By using Razumikhin stability theorem, a linear state feedback control law is found, ensuring not only the closed-loop system's stability but guaranteed cost index. And the problem of designing the optimal guaranteed cost controller is converted to a convex optimization problem within the framework...
In the continuous casting process, the steel level in the mold is controlled using a stopper rod as the flow control actuator and a level sensor. Various control strategies are used in order to reduce the mold level fluctuations which strongly affect the surface quality of the final product. Indeed, under certain casting conditions, the plant is often disturbed by periodic phenomena, in particular...
This paper investigates the robust reliable control for a class of uncertain switched nonlinear systems with time delay. Firstly, a criterion for switched nonlinear system with time delay is proposed to guarantee exponential stability. Then, a design methodology of the robust reliable control for switched nonlinear systems with time delay and parameter uncertainties is presented. The proposed state...
An approximation controller is developed to obtain an optimal control for nonlinear networked control systems (NCS) with time delay. In the approach only the non-linear compensating term, solution of a sequence of adjoint vector differential equations, is required iteration. By taking the finite iteration of non-linear compensating term of optimal solution sequence, a suboptimal control law for NCS...
This paper is concerned with the robust stability problem of linear uncertain discrete time delay systems with control constraints. The uncertain terms are treated with highly structured perturbations. The state feedback controller is introduced to satisfy the requirement of robust stability. An example is given to illustrate the application of our result.
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