Identification and sensitivity analysis of a correlated ground rule system (design arc)

2017 ◽  
Author(s):  
Eric Eastman ◽  
Dureseti Chidambarrao ◽  
Werner Rausch ◽  
Rasit O. Topaloglu ◽  
Dongbing Shao ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
System Design ◽  
Ground Rule ◽  
Rule System

Sensitivity Analysis Methods for Uncertainty Budgeting in System Design

AIAA Journal ◽  
2016 ◽  
Vol 54 (10) ◽  
pp. 3134-3148 ◽  
Author(s):  
Max M. J. Opgenoord ◽  
Karen E. Willcox
Keyword(s):  
Sensitivity Analysis ◽  
System Design ◽  
Analysis Methods

scholarly journals On Minimisation of Earthing System Touch Voltages

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3838 ◽  
Author(s):  
Vaclav Vycital ◽  
Michal Ptacek ◽  
David Topolanek ◽  
Petr Toman
Keyword(s):  
Sensitivity Analysis ◽  
System Design ◽  
Initial Conditions ◽  
Optimal Solution ◽  
Solution Space ◽  
Specific Situation ◽  
Double Ring ◽  
Spatial Dimensions ◽  
Cost Efficient ◽  
Optimisation Methods

Finding cost efficient earthing system design with acceptable level of safety might be quite tedious work. Thus, many earthing system engineers try to find the most suitable design either by employing only their best experience or taking advantage of some more complex optimisation programs. Although both approaches might work well under certain circumstances, they might fail either due to counter-intuitiveness of the specific situation or by misunderstanding of the applied optimisation method, its limitations etc. Thus, in this paper, the earthing system design optimisation problem was addressed by analysing optimisation simulation results together with conducted sensitivity analysis. In the paper, a simple double ring earthing system was optimised while using five different optimisation methods. The earthing system was placed in different horizontally stratified soil models and the earthing system was optimised by minimising touch voltages instead of commonly minimised earth potential rise. The earthing system was modelled by Ansys Maxwell software. Apart from using Ansys Maxwell built-in optimisers, the possible solution space has also been mapped by performing sensitivity analysis with changing the earthing system design dimensions and the results of optimisation were compared and validated. It was found out that the Sequential Non-Linear Programming Optimisation technique was quite superior to the other techniques. Additionally, in most cases, the Ansys Maxwell optimiser was able to found optimal solution; however, in some cases, based on the initial conditions, it might get stuck in local minima or the results might be influenced by the solution noise. Additionally, some quite non intuitive dependencies of earthing system electrodes positions had been found when different spatial dimensions constraints are used.

scholarly journals Sensitivity analysis methods for mitigating uncertainty in engineering system design

2018 ◽  
Vol 21 (3) ◽  
pp. 191-209 ◽  
Author(s):  
Qinxian Chelsea Curran ◽  
Douglas Allaire ◽  
Karen E. Willcox
Keyword(s):  
Sensitivity Analysis ◽  
System Design ◽  
Engineering System ◽  
Analysis Methods ◽  
Engineering System Design
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