Effects of a Short Time Delay on System Dynamics

2002 ◽  
pp. 151-188
Author(s):  
Haiyan Hu ◽  
Zaihua Wang
Keyword(s):  
Time Delay ◽  
System Dynamics ◽  
Short Time ◽  
Short Time Delay

Suppression of runaway electron generation by massive helium injection after induced disruptions on TEXTOR

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
A. Lvovskiy ◽  
H. R. Koslowski ◽  
L. Zeng ◽  
Keyword(s):  
Time Delay ◽  
Runaway Electron ◽  
Critical Density ◽  
Runaway Electrons ◽  
Electron Generation ◽  
Disruption Mitigation ◽  
Order Of Magnitude ◽  
Short Time ◽  
Short Time Delay

Disruptions with runaway electron generation have been deliberately induced by injection of argon using a disruption mitigation valve. A second disruption mitigation valve has been utilised to inject varying amounts of helium after a short time delay. No generation of runaway electrons has been observed when more than a critical amount of helium has been injected no later than 5 ms after the triggering of the first valve. The required amount of helium for suppression of runaway electron generation is up to one order of magnitude lower than the critical density according to Connor & Hastie (1975) and Rosenbluth & Putvinski (1997).

Short-time-delay limit of the self-coupled FitzHugh-Nagumo system

2016 ◽  
Vol 93 (2) ◽  
Author(s):  
Thomas Erneux ◽  
Lionel Weicker ◽  
Larissa Bauer ◽  
Philipp Hövel
Keyword(s):  
Time Delay ◽  
The Self ◽  
Short Time ◽  
Short Time Delay

Slowly dispersive, short time delay line based on very thick liquid phase epitaxially grown yttrium iron garnet

1984 ◽  
Vol 55 (6) ◽  
pp. 2512-2514 ◽  
Author(s):  
P. De Gasperis ◽  
G. Miccoli ◽  
C. Di Gregorio ◽  
R. Roveda
Keyword(s):  
Time Delay ◽  
Liquid Phase ◽  
Yttrium Iron Garnet ◽  
Delay Line ◽  
Yttrium Iron ◽  
Iron Garnet ◽  
Short Time ◽  
Short Time Delay

Stabilization to Nonlinear Systems With Short Time Delay in State Feedback

1999 ◽  
Author(s):  
Zaihua Wang ◽  
Haiyan Hu
Keyword(s):  
Differential Equation ◽  
Ordinary Differential Equation ◽  
Time Delay ◽  
Nonlinear Systems ◽  
State Feedback ◽  
Center Manifold Reduction ◽  
System Equation ◽  
Linear Transform ◽  
Short Time ◽  
Short Time Delay

Abstract Local stabilization lo critically stable nonlinear systems with a short time delay in state feedback is discussed in this paper. The stabilizing procedure is composed of two steps. The first step is to simplify the retarded differential equation to an ordinary differential equation by using a linear transform with memory controller and neglecting some high order terms. Then the system equation is simplified into the standard critical forms of ordinary differential equation, and consequently, the center manifold reduction is applied to stabilizing the simplified systems of critical cases. Both analysis and simulation show that the approach is effective if the time delay is short enough.

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