Minimal controller synthesis for time-delay systems using a Smith predictor

1996 ◽  
Author(s):  
K.I. Aziz
Keyword(s):  
Time Delay ◽  
Smith Predictor ◽  
Controller Synthesis ◽  
Delay Systems ◽  
Time Delay Systems

Optimal controller synthesis for second order time delay systems with at least one RHP pole

2018 ◽  
Vol 73 ◽  
pp. 181-188 ◽  
Author(s):  
K. Ghousiya Begum ◽  
A. Seshagiri Rao ◽  
T.K. Radhakrishnan
Keyword(s):  
Time Delay ◽  
Second Order ◽  
Controller Synthesis ◽  
Delay Systems ◽  
Optimal Controller ◽  
Time Delay Systems

Control of Time-Delay Systems Using Robust Fractional-Order Control and Robust Smith Predictor Based Control

2005 ◽  
Author(s):  
Patrick Lanusse ◽  
Alain Oustaloup
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Control Plant ◽  
Smith Predictor ◽  
Delay Systems ◽  
Time Delay Systems ◽  
Robust Controller ◽  
Fractional Order Control ◽  
And Performance ◽  
Performance Tradeoff

Many modifications have been proposed to improve the Smith predictor structure used to control plant with time-delay. Some of them have been proposed to enhance the robustness of Smith predictor based controllers. They are often based on the use of deliberately mismatched model of the plant and then the IMC method can be used to tune the controller. This paper compares the performance of two Smith predictor based controllers including a mismatched model to the performance provided by a fractional order Crone controller which is well known for managing well the robustness and performance tradeoff. It is shown that even if it can simplify the design of (robust) controller, the use of an improved Smith predictor is not necessary to obtain good performance.

Delay-dependent robust H∞ control for neutral time-delay systems

2014 ◽  
Vol 24 (5) ◽  
Author(s):  
MAN SUN ◽  
AIMIN YANG
Keyword(s):  
Time Delay ◽  
Performance Criterion ◽  
Controller Synthesis ◽  
Delay Systems ◽  
Descriptor System ◽  
Linear Matrix ◽  
Time Delay Systems ◽  
Matrix Inequalities ◽  
Delay Dependent ◽  
Decoupled Structure

We derive a delay-dependent H∞ performance criterion with a decoupled structure for systems with neutral time delay. We then extend it to an H∞ controller synthesis for systems with polytopic uncertainty. All conditions are given in terms of linear matrix inequalities (LMIs). In some previous descriptor system methods, the products of the controller and Lyapunov matrices are completely separated for the performance analysis, but not for controller synthesis - the method developed in the current paper eliminates this weakness. We present a numerical example to illustrate the effectiveness of the solution.

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