Grid Forming Inverter: Laboratory-Scale Hardware Test Bed Setup and Weak Grid Operation

2021 ◽  
Author(s):  
Ratik Mittal ◽  
Zhixin Miao ◽  
Lingling Fan
Keyword(s):  
Laboratory Scale ◽  
Test Bed ◽  
Weak Grid ◽  
Grid Operation ◽  
Hardware Test

scholarly journals Low Cost Satellite Attitude Hardware Test Bed

2016 ◽  
Author(s):  
Austin Probe ◽  
Vinicius Guimaraes Goecks ◽  
John Hurtado
Keyword(s):  
Low Cost ◽  
Test Bed ◽  
Satellite Attitude ◽  
Hardware Test

Multiband OFDM for Cognitive Radio – A Way for Cyclostationary Detection and Interference Cancellation

2016 ◽  
Vol 6 (4) ◽  
pp. 1702
Author(s):  
Avila J ◽  
Thenmozhi K
Keyword(s):  
Cognitive Radio ◽  
Interference Cancellation ◽  
Software Defined Radio ◽  
Test Bed ◽  
Radio System ◽  
Labview Software ◽  
Free Spectrum ◽  
Wireless Environment ◽  
Cyclostationary Detection ◽  
Hardware Test

With the tremendous growth in wireless technology there has been a shortage in the spectrum utilized for certain applications while some spectrum remains idle. To overcome this problem and for the efficient utilization of the spectrum cognitive radio is the suitable solution.Multiband OFDM can be easily modeled as cognitive radio, a technology that is employed for utilizing the available spectrum in the most efficient way. Since sensing of the free spectrum for detecting the arrival of the primary users is the foremost job of cognitive, here cyclostationary based spectrum sensing is carried out. Its performance is investigated using universal software defined radio peripheral (USRP) kit which is the hardware test bed for the cognitive radio system. Results are shown using Labview software. Further to mitigate the interference between the primary and cognitive users a modified intrusion elimination (AIC) algorithm had been proposed which in turn ensures the coexistence of both the users in the same wireless environment.

scholarly journals Performance Characterization of a Rover Navigation Algorithm Using Large-Scale Simulation

2007 ◽  
Vol 15 (2) ◽  
pp. 95-105
Author(s):  
Richard Madison ◽  
Abhinandan Jain ◽  
Christopher Lim ◽  
Mark Maimone
Keyword(s):  
Autonomous Navigation ◽  
Large Scale ◽  
Failure Modes ◽  
Operating Conditions ◽  
Performance Limits ◽  
Test Bed ◽  
Large Scale Simulation ◽  
Navigation Algorithm ◽  
Time Required ◽  
Hardware Test

Autonomous rover navigation is a critical technology for robotic exploration of Mars. Simulation allows more extensive testing of such technologies than would be possible with hardware test beds alone. A large number of simulations, running in parallel, can test an algorithm under many different operating conditions to quickly identify the operational envelope of the technology and identify failure modes that were not discovered in more limited testing. GESTALT is the autonomous navigation algorithm developed for NASA's Mars rovers. ROAMS is a rover simulator developed to support the Mars program. We have integrated GESTALT into ROAMS to test closed-loop, autonomous navigation in simulation. We have developed a prototype capability to run many copies of ROAMS in parallel on a supercomputer, varying input parameters to rapidly explore GESTALT's performance across a parameter space. Using these tools, we have demonstrated that large scale simulation can identify performance limits and unexpected behaviors in an algorithm. Such parallel simulation was able to test approximately 500 parameter combinations in the time required for a single test on a hardware test bed.

scholarly journals Multiband OFDM for Cognitive Radio – A Way for Cyclostationary Detection and Interference Cancellation

2016 ◽  
Vol 6 (4) ◽  
pp. 1702
Author(s):  
Avila J ◽  
Thenmozhi K
Keyword(s):  
Cognitive Radio ◽  
Interference Cancellation ◽  
Software Defined Radio ◽  
Test Bed ◽  
Radio System ◽  
Labview Software ◽  
Free Spectrum ◽  
Wireless Environment ◽  
Cyclostationary Detection ◽  
Hardware Test

With the tremendous growth in wireless technology there has been a shortage in the spectrum utilized for certain applications while some spectrum remains idle. To overcome this problem and for the efficient utilization of the spectrum cognitive radio is the suitable solution.Multiband OFDM can be easily modeled as cognitive radio, a technology that is employed for utilizing the available spectrum in the most efficient way. Since sensing of the free spectrum for detecting the arrival of the primary users is the foremost job of cognitive, here cyclostationary based spectrum sensing is carried out. Its performance is investigated using universal software defined radio peripheral (USRP) kit which is the hardware test bed for the cognitive radio system. Results are shown using Labview software. Further to mitigate the interference between the primary and cognitive users a modified intrusion elimination (AIC) algorithm had been proposed which in turn ensures the coexistence of both the users in the same wireless environment.

scholarly journals Experimental Replication of an Aeroengine Combustion Instability

2000 ◽  
Author(s):  
J. M. Cohen ◽  
J. R. Hibshman ◽  
W. Proscia ◽  
T. J. Rosfjord ◽  
B. E. Wake ◽  
...  
Keyword(s):  
Combustion Instability ◽  
Laboratory Scale ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Test Bed ◽  
Root Cause ◽  
Physically Based ◽  
Scaling Process ◽  
Scale Experiment ◽  
Development And Validation

Combustion instabilities in gas turbine engines are most frequently encountered during the late phases of engine development, at which point they are difficult and expensive to fix. The ability to replicate an engine-traceable combustion instability in a laboratory-scale experiment offers the opportunity to economically diagnose the problem more completely (to determine the root cause), and to investigate solutions to the problem, such as active control. The development and validation of active combustion instability control requires that the causal dynamic processes be reproduced in experimental test facilities which can be used as a test bed for control system evaluation. This paper discusses the process through which a laboratory -scale experiment can be designed to replicate an instability observed in a developmental engine. The scaling process used physically-based analyses to preserve the relevant geometric, acoustic and thermo-fluid features, ensuring that results achieved in the single-nozzle experiment will be scaleable to the engine.

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