scholarly journals Dynamical effects of time delays and time delay compensation in power controlled DS-CDMA

2001 ◽  
Vol 19 (1) ◽  
pp. 141-151 ◽  
Author(s):  
F. Gunnarsson ◽  
F. Gustafsson ◽  
J. Blom
Keyword(s):  
Time Delay ◽  
Time Delays ◽  
Delay Compensation ◽  
Time Delay Compensation

scholarly journals Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 208
Author(s):  
Alexander Molina-Cabrera ◽  
Mario A. Ríos ◽  
Yvon Besanger ◽  
Nouredine Hadjsaid ◽  
Oscar Danilo Montoya
Keyword(s):  
Time Delay ◽  
Power Systems ◽  
Time Delays ◽  
Closed Loop ◽  
Control Strategies ◽  
Area Measurement ◽  
Delay Compensation ◽  
Measurement Systems ◽  
Tie Lines ◽  
Time Delay Compensation

Time-delay is inherent to communications schemes in power systems, and in a closed loop strategy the presence of latencies increases inter-area oscillations and security problems in tie-lines. Recently, Wide Area Measurement Systems (WAMS) have been introduced to improve observability and overcome slow-rate communications from traditional Supervisory Control and Data Acquisition (SCADA). However, there is a need for tackling time-delays in control strategies based in WAMS. For this purpose, this paper proposes an Enhanced Time Delay Compensator (ETDC) approach which manages varying time delays introducing the perspective of network latency instead dead time; also, ETDC takes advantage of real signals and measurements transmission procedure in WAMS building a closed-loop memory control for power systems. The strength of the proposal was tested satisfactorily in a widely studied benchmark model in which inter-area oscillations were excited properly.

Time Delay Compensation and Stability Issues in Teleoperation

2000 ◽  
Author(s):  
Carmen M. Caradima ◽  
David W. Wang
Keyword(s):  
Time Delay ◽  
Time Delays ◽  
Research Area ◽  
Haptic Device ◽  
Delay Compensation ◽  
Haptic Devices ◽  
Time Delay Compensation ◽  
The Stability ◽  
Stability Issues ◽  
Unknown Time Delays

Abstract The stability of teleoperation over the Internet is a growing research area. The unknown time delays of the data transmission, however, compromise performance and stability. It is assumed in this work that force information is not available which is the case for most commercial haptic devices. This paper examines two approaches to this challenging problem. The first approach focuses on using Kalman filters to predict, at the local haptic device, the present state of the remote haptic device. In this way, the time delays can be made to seem as if they did not exist. Simulation results are presented on experimental data to verify this technique. The second approach is to employ haptic devices which are mechanically designed to have linear dynamics. It is shown that our proposed feedback configuration is stable for all gains, up to a maximum time delay which can be precomputed. Experimental results are presented.

Designing Time Delay Compensation Methods for Functional Modes Using Sensory Evaluation

2015 ◽  
Vol 135 (7) ◽  
pp. 755-764 ◽  
Author(s):  
Shuhei Shimizu ◽  
Yoshiki Ohno ◽  
Takahiro Nozaki ◽  
Kouhei Ohnishi
Keyword(s):  
Time Delay ◽  
Sensory Evaluation ◽  
Delay Compensation ◽  
Compensation Methods ◽  
Time Delay Compensation
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