| Skjetne R (2014), "Maneuvering LOS control design: The fully actuated case". Thesis at: Norwegian Univ. Science & Technology, Dept. of Marine Technology. Trondheim, March 17, 2014.
[BibTeX] |
BibTeX:
@techreport{rskj14C,
author = {Skjetne, R.},
title = {Maneuvering LOS control design: The fully actuated case},
school = {Norwegian Univ. Science & Technology, Dept. of Marine Technology},
year = {2014},
note = {Rev.E}
}
|
| Skjetne R (2013), "Modeling a diesel-generator power plant", Norwegian Univ. Science {\&} Technology, Dept. of Marine Technology. Oct. 3, 2013.
[BibTeX] |
BibTeX:
@misc{rskj13C,
author = {Skjetne, R.},
title = {Modeling a diesel-generator power plant},
howpublished = {Norwegian Univ. Science {\&} Technology, Dept. of Marine Technology},
year = {2013},
note = {Lecture notes: Course TMR 4290}
}
|
| Skjetne R (2004), "Set-stability for nonlinear systems". Thesis at: Dept. Eng. Cybernetics, NTNU. Trondheim, Norway, 11, 2004. (2004-8-W) |
| Abstract: In this report we will give a treatment of important tools for analyzing stability in nonlinear dynamical systems. This inludes both stability of equilibria and the more general concept of set-stability. Some suggested applications for its use are time-varying systems, maneuvering systems, adaptive systems, and observer designs. A variety of references are used, where most of the definitions and theorems are taken from published references and organized in a consistent notation. The proper citations are clearly referenced. Using these references a few theorems have been developed further by the author as minor extensions to the existing theory. This concerns in particular Theorem 4.3 and Theorem 5.2. |
BibTeX:
@techreport{rskj04G,
author = {R. Skjetne},
title = {Set-stability for nonlinear systems},
school = {Dept. Eng. Cybernetics, NTNU},
year = {2004},
number = {2004-8-W},
url = {http://folk.ntnu.no/rskjetne/Publications/2004-8-W NTNU - Skjetne - SetStabilityTheory.pdf}
}
|
| Skjetne R and Sørensen AJ (2004), "Computer-based systems on ships and offshore vessels: The Software Problem ++". Thesis at: Marine Cybernetics AS. Trondheim, Norway, 10, 2004. |
| Abstract: This report deals with the imprecise term denoted �software problems� for control and monitoring systems onboard ships and offshore vessels. It has, however, turned out that many problems identified are not purely related to the software, but are related to design, fabrication, operation, and maintenance of the systems. Due to this fact we have denoted all these related problems as the �Software Problem ++�.
In order to understand why software problems occur, this report gives a brief description of the main drivers for technology progress, leading to an increasing integration complexity and number of I/O for industrial control and monitoring systems for offshore vessels. Moreover, state of practice for quality assurance (QA) is briefly treated in order to evaluate the effectiveness of present QA procedures for capturing the described problems. Examples in the report are taken from incidents related to failures in computer-based systems onboard DP vessels. The main focus has therefore been problems related to DP systems, but it is anticipated that most of the problems reported will also be found in other computer-based systems. This report should form the basis for evaluation of possible solutions to the challenges identified. The next step should be to identify the most promising solutions and how these solutions actually will solve the various challenges identified in the 'Software problem++'. |
BibTeX:
@techreport{rskj04B,
author = {R. Skjetne and Sørensen, A. J.},
title = {Computer-based systems on ships and offshore vessels: The Software Problem ++},
school = {Marine Cybernetics AS},
year = {2004},
note = {Joint report by Marine Cybernetics, Det Norske Veritas, Statoil, Smedvig Offshore, Kongsberg Maritime, Norsk Hydro, Stolt Offshore, Eidesvik, Subsea 7, Solstad Offshore, Ulstein, ABB, PSA Norway, and Norwegian Maritime Directorate},
url = {http://folk.ntnu.no/rskjetne/Publications/2004-10-27 SW Problem++.pdf}
}
|
| Skjetne R (2001), "Work Note: Exploration of a Maneuvering Controller of a Strict Feedback System with Vector Relative Degree 2 with a Modified Dynamic Projection algorithm.". Thesis at: Univ. California, Santa Barbara., September, 2001.
[BibTeX] |
BibTeX:
@techreport{WNrskj01B,
author = {Skjetne, R.},
title = {Work Note: Exploration of a Maneuvering Controller of a Strict Feedback System with Vector Relative Degree 2 with a Modified Dynamic Projection algorithm.},
school = {Univ. California, Santa Barbara},
year = {2001},
note = {Work Note}
}
|
| Skjetne R (2001), "Kinematics: The Serret-Frenet frame and others.". Thesis at: Norwegian Univ. Science & Technology., July, 2001.
[BibTeX] |
BibTeX:
@techreport{WNrskj01A,
author = {Skjetne, R.},
title = {Kinematics: The Serret-Frenet frame and others.},
school = {Norwegian Univ. Science & Technology},
year = {2001}
}
|
| Skjetne R (2000), "On the Stability and Performance of Adaptive Systems with Time-varying Parameters: analysis of adaptive backstepping schemes designed for constant parameters". Thesis at: Univ. California, Santa Barbara., June, 2000. |
| Abstract: With a starting point of a system in strict feedback form with unknown constant parameters, we show how to control it using adaptive backstepping and tuning function design. Then we address the issue of time-variations in the parameters. It is shown that global boundedness is to some extent given for free by the Lyapunov function. We then proceed with performance analysis. If the parameters vary fast, almost periodic, continuously or piecewise continuously, it is established somewhat good performance in the z-states based on an averaging argument. Slow parameter variations are analysed from a frozen-parameter argument. Both of the tools used seem to explain well the system behavior observed in simulations. |
BibTeX:
@techreport{rskj00A,
author = {Skjetne, R.},
title = {On the Stability and Performance of Adaptive Systems with Time-varying Parameters: analysis of adaptive backstepping schemes designed for constant parameters},
school = {Univ. California, Santa Barbara},
year = {2000},
note = {Repport in the course ECE249 - Adaptive Control},
url = {https://www.researchgate.net/publication/237047207_ON_THE_STABILITY_AND_PERFORMANCE_OF_ADAPTIVE_SYSTEMS_WITH_TIME-VARYING_PARAMETERS_analysis_of_adaptive_backstepping_schemes_designed_for_constant_parameters?ev=prf_pub}
}
|
| Skjetne R (1997), "Development of a Self-Tuning PID-Controller: -based on the application of LabVIEW version 4.0.1". Thesis at: Bergen College. Manchester Metropolitan Univ., England, June, 1997. |
| Comment: Done as part of the ERASMUS student mobility program |
BibTeX:
@techreport{rskj97A,
author = {Skjetne, R.},
title = {Development of a Self-Tuning PID-Controller: -based on the application of LabVIEW version 4.0.1},
school = {Bergen College},
year = {1997},
url = {http://www.itk.ntnu.no/ansatte/Skjetne_Roger/TechnicalPapers-filer/Selftuning_PID/Final_Project_Report.pdf}
}
|