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1999
A time-delay under the context of process control systems may be defined as the time interval from the application of a control signal to any observable change in the process variable. Time delays have always been among the most difficult problems encountered in process control. It could occur for various reasons and in different magnitudes.
Qing-Guo Wang +2 more
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A time-delay under the context of process control systems may be defined as the time interval from the application of a control signal to any observable change in the process variable. Time delays have always been among the most difficult problems encountered in process control. It could occur for various reasons and in different magnitudes.
Qing-Guo Wang +2 more
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Papers presented at the May 3-5, 1960, western joint IRE-AIEE-ACM computer conference on - IRE-AIEE-ACM '60 (Western), 1960
The Convair-Astronautics Time Delay System is being developed to make possible the delay of analog functions over a greater range than is possible with more conventional means. The system is designed to handle ten channels of analog data, delay each for the same time interval, and reproduce the functions within 0.1% of the original composition for all ...
Charles D. Hofmann, Harold L. Pike
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The Convair-Astronautics Time Delay System is being developed to make possible the delay of analog functions over a greater range than is possible with more conventional means. The system is designed to handle ten channels of analog data, delay each for the same time interval, and reproduce the functions within 0.1% of the original composition for all ...
Charles D. Hofmann, Harold L. Pike
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2016
The past decades have witnessed extensive research on time-delay systems, and many analysis and synthesis results using delay-dependent approach have been widely reported in concern of conservatism, see for example, Boukas and Liu, Deterministic and Stochastic Time-Dealy Systems, 2002, [193], Gao et al., IET Control Theory Appl 151(6):691–698, 2004 ...
Lixian Zhang +3 more
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The past decades have witnessed extensive research on time-delay systems, and many analysis and synthesis results using delay-dependent approach have been widely reported in concern of conservatism, see for example, Boukas and Liu, Deterministic and Stochastic Time-Dealy Systems, 2002, [193], Gao et al., IET Control Theory Appl 151(6):691–698, 2004 ...
Lixian Zhang +3 more
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System modeling oriented time-delay estimation
ISA Transactions, 2020Training models to approximate target systems is the dominant method applied to unknown-structure delay system modeling. Due to limited learning ability of the models, the time-delay estimation (TDE) process should be executed prior to the training. The TDE for unknown-structure multi-input multi-output (MIMO) delay systems remains a challenge due to ...
Xuguang, Wang +3 more
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2016
This chapter first investigates the stability problem of a class of discrete-time linear switched systems with cyclic switching and state delays, and a numerical searching algorithm is explored to compute the feasible values of dwell time of the subsystems.
Lixian Zhang +3 more
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This chapter first investigates the stability problem of a class of discrete-time linear switched systems with cyclic switching and state delays, and a numerical searching algorithm is explored to compute the feasible values of dwell time of the subsystems.
Lixian Zhang +3 more
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Linear Filtering for Time-Delay Systems
IMA Journal of Mathematical Control and Information, 1989Summary: A linear filtering problem is studied in which the signal process (x(t): \(t\geq 0)\) is described by a stochastic differential equation where time delays are present in both the noise input and the x variable. By means of a transformation new to the filtering literature, we reduce the signal equation to a delay-free stochastic evolution ...
Briggs, Monima, Vinter, Richard
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2002
During the past decades, we have seen more and more examples showing the importance of dynamical systems subject to abrupt variations in their structures. This is partly due to the fact that very often dynamical systems are inherently vulnerable to component failures or repairs, sudden environmental disturbances, changing subsystem interconnections ...
El-Kébir Boukas, Zi-Kuan Liu
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During the past decades, we have seen more and more examples showing the importance of dynamical systems subject to abrupt variations in their structures. This is partly due to the fact that very often dynamical systems are inherently vulnerable to component failures or repairs, sudden environmental disturbances, changing subsystem interconnections ...
El-Kébir Boukas, Zi-Kuan Liu
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INTERVAL STABILITY OF TIME-DELAY SYSTEMS
IFAC Proceedings Volumes, 1990The major concern of structured stability robustness problems is to assure stability against possible parameter drift from or fluctuation around their nominal values. Coping with this problem will be done, in this paper, through defining a concept, called, “interval stability", which implies that stability of systems with an interval parameter is ...
T. Mori, H. Kokame
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SIMPLE MEMRISTIVE TIME-DELAY CHAOTIC SYSTEMS
International Journal of Bifurcation and Chaos, 2013Memristive systems have appeared in various application fields from nonvolatile memory devices and biological structures to chaotic circuits. In this paper, we propose two nonlinear circuits based on memristive systems in the presence of delay, i.e. memristive systems in which the state of the memristor depends on the time-delay.
V. T. Pham +3 more
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Encryption with synchronized time-delayed systems
Physical Review E, 2005We propose a new communication scheme that uses time-delayed chaotic systems with delay time modulation. In this method, the transmitter encodes a message as an additional modulation of the delay time and then the receiver decodes the message by tracking the delay time. We demonstrate our communication scheme in a system of coupled logistic maps.
Won-Ho, Kye +3 more
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