Closed-loop stability of systems driven by real-time, dynamic optimization algorithms

Author(s):  
L.K. McGovern ◽  
E. Feron
2006 ◽  
Vol 5-6 ◽  
pp. 79-84 ◽  
Author(s):  
Y.N. Kyrychko ◽  
K.B. Blyuss ◽  
A. Gonzalez-Buelga ◽  
S.J. Hogan ◽  
David J. Wagg

In this paper delay differential equations approach is used to model a real-time dynamic substructuring experiment. Real-time dynamic substructuring involves dividing the structure under testing into two or more parts. One part is physically constructed in the lab- oratory and the remaining parts are being replaced by their numerical models. The numerical and physical parts are connected via an actuator. One of the main difficulties of this testing technique is the presence of delay in a closed loop system. We apply real-time dynamic sub- structuring to a nonlinear system consisting of a pendulum attached to a mass-spring-damper. We will show how a delay can have (de)stabilising effect on the behaviour of the whole system. Theoretical results agree very well with experimental data.


2007 ◽  
Vol 17 (3) ◽  
pp. 261-271 ◽  
Author(s):  
Nathaniel Peters ◽  
Martin Guay ◽  
Darryl DeHaan

2008 ◽  
Vol 41 (2) ◽  
pp. 3246-3251 ◽  
Author(s):  
Ali Mesbah ◽  
Alex N. Kalbasenka ◽  
Adrie E.M. Huesman ◽  
Herman J.M. Kramer ◽  
Paul M.J. Van den Hof

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Bai Xiao-ping ◽  
Zhao Yu-hong ◽  
Liu Ya-nan

The mine logistics transportation system with belt and surge links is often formed by a complex hybrid dynamic system that consists of continuous and discrete links, and these parts can have the complex changes along with the mining engineering going on. Studying the hybrid system with belt and surge links to fully realize its beneficial functions is very significant. Until now, there have been many references studying the logistics transportation hybrid system with belt and surge links, and many concepts about it have been set up. However, in these references, complicated real-time dynamic changes of the hybrid system usually is studied. This paper presents a novel approach to study real-time dynamic optimization analysis and simulation problems of complex mine logistics transportation hybrid system, which can be used to make optimization design for this kind of complex hybrid system. The proposed method considered expressly complicated real-time dynamic changing of the hybrid system comparing with some existing references and can solve some optimization design problems of the hybrid system. In addition, this paper used statistical data of a real logistics transportation system with belt and surge bin on simulation and gets some useful conclusions. The application result shows that the presented method is valid.


2006 ◽  
Vol 29 (4) ◽  
pp. 929-935 ◽  
Author(s):  
Martin Guay ◽  
J. Fraser Forbes

2020 ◽  
Vol 37 (6) ◽  
pp. 2017-2034
Author(s):  
Yu-Ting L.V. ◽  
Yong Li ◽  
De-Xing Yang ◽  
Zhenhua Bai ◽  
Jinlong Li ◽  
...  

Purpose Continuous annealing (CA) units usually lack a physical shapemeter; consequently, real-time display and closed-loop control of the strip shape are impossible to achieve. Design/methodology/approach A shape model for the CA process is established in this study. Specifically, a virtual shapemeter and closed-loop control system based on the advanced parameter acquisition system and information transmission of CA units are developed in C++ programming language. This system realises real-time dynamic shape display, closed-loop control and shape prediction by collecting raw data of steel coils and parameters during CA. Findings Field test results show that the shape predicted by the virtual shapemeter coincides with the measured shape by over 90 per cent, which fully meets the precision requirement of industrial applications. Originality/value Moreover, shape quality is effectively improved without increasing hardware investments.


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