Periodic solutions of some autonomous differential equations with variable time delay

1979 ◽  
pp. 16-31 ◽  
Author(s):  
Wolfgang Alt
Keyword(s):  
Time Delay ◽  
Differential Equations ◽  
Periodic Solutions ◽  
Variable Time Delay ◽  
Variable Time ◽  
Autonomous Differential Equations

Control System Design Considering Packet Loss and Variable Time Delay in a Network-Based System

2017 ◽  
Vol 137 (2) ◽  
pp. 87-94
Author(s):  
Tooru Suhara ◽  
Hiromu Norizuki ◽  
Yutaka Uchimura
Keyword(s):  
Control System ◽  
Time Delay ◽  
System Design ◽  
Packet Loss ◽  
Control System Design ◽  
Variable Time Delay ◽  
Variable Time

scholarly journals On Adaptive Moving Average Algorithms for the Application of the Conservative Power Theory in Systems with Variable Frequency

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1201
Author(s):  
Daniel dos Santos Mota ◽  
Elisabetta Tedeschi
Keyword(s):  
Time Delay ◽  
Moving Average ◽  
Voltage Source ◽  
Moving Averages ◽  
Nonlinear Load ◽  
Power Theory ◽  
Variable Time Delay ◽  
Variable Time ◽  
Conservative Power Theory ◽  
Conservative Power

The Conservative Power Theory (CPT) emerged in recent decades as a theoretical framework for coping with harmonically distorted and unbalanced electric networks of ac power systems with a high participation of converter interfaced loads and generation. The CPT measurements are intrinsically linked to moving averages (MA) over one period of the grid. If the CPT is to be used in a low-inertia isolated-grid scenario, which is subjected to frequency variations, adaptive moving averages (AMA) are necessary. This paper reviews an efficient way of computing MAs and turns it into an adaptive one. It shows that an easily available variable time delay block, from MATLAB, causes steady-state errors in the measurements when the grid frequency varies. A new variable time delay block is, thus, proposed. Nonetheless, natural pulsations in the instantaneous power slip through MAs when the discrete moving average window does not fit perfectly the continuously varying period of the grid. A method consisting of weighing two MAs is reviewed and a new and effective hybrid AMA is proposed. The CPT transducers with the different choices of AMAs are compared via computer simulations of a single-phase voltage source feeding either a linear or a nonlinear load.

Variable time-delay system for broadband phased array and other transversal filtering applications

1993 ◽  
Vol 32 (3) ◽  
pp. 613 ◽  
Author(s):  
Edward N. Toughlian
Keyword(s):  
Time Delay ◽  
Phased Array ◽  
Delay System ◽  
Time Delay System ◽  
Variable Time Delay ◽  
Variable Time

Use of Variable Time-Delay Sum-Frequency Generation for Improved Spectroscopic Analysis

2011 ◽  
Vol 115 (39) ◽  
pp. 19303-19310 ◽  
Author(s):  
Alexander D. Curtis ◽  
Matthew C. Asplund ◽  
James E. Patterson
Keyword(s):  
Time Delay ◽  
Spectroscopic Analysis ◽  
Sum Frequency Generation ◽  
Variable Time Delay ◽  
Sum Frequency ◽  
Variable Time ◽  
Frequency Generation

Existence of weighted pseudo anti-periodic solutions to some non-autonomous differential equations

2012 ◽  
Vol 218 (11) ◽  
pp. 6536-6548 ◽  
Author(s):  
Najja S. Al-Islam ◽  
Saud M. Alsulami ◽  
Toka Diagana
Keyword(s):  
Differential Equations ◽  
Periodic Solutions ◽  
Autonomous Differential Equations

Stability of a system with variable time delay

1980 ◽  
Vol 25 (3) ◽  
pp. 552-554 ◽  
Author(s):  
K. Hirai ◽  
Y. Satoh
Keyword(s):  
Time Delay ◽  
Variable Time Delay ◽  
Variable Time
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