Stabilising ships for helicopter operations
Stabilising ships for helicopter operations
The overall objective of this work was to develop systems that would lead to increases in shipborne helicopter operational limits and to develop tools with which to quantify their performance.
This has been accomplished by minimising ship motions by way of a H∞ lateral force estimator (LFE) controller. This controller exhibited improved performance over the conventional type controllers frequently used on modern day vessels. A H∞ LFE controller has been developed that produced both good roll and LFE attenuation using a structured design approach, which out performed a classic parallel proportional integral derivative (PID) controller. The H∞ control method proved to have advantages over more conventional approaches resulting from adaptability of the design. This benefited the activity at higher frequencies.
An experimental set up has been developed that was used successfully to test H∞ roll controllers and classical frequency response roll controllers using a small scale towed ship model. The H∞ roll controllers were found to yield similar overall roll attenuating performance in comparison to the classic controllers tested. The results from this were also used to validate a ship motion package. The software was then used to quantify the controller performances numerically.
University of Southampton
Prince, Martyn Paul
51d6f3ab-62a9-4e3d-a430-2ace3cdc3432
2000
Prince, Martyn Paul
51d6f3ab-62a9-4e3d-a430-2ace3cdc3432
Prince, Martyn Paul
(2000)
Stabilising ships for helicopter operations.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The overall objective of this work was to develop systems that would lead to increases in shipborne helicopter operational limits and to develop tools with which to quantify their performance.
This has been accomplished by minimising ship motions by way of a H∞ lateral force estimator (LFE) controller. This controller exhibited improved performance over the conventional type controllers frequently used on modern day vessels. A H∞ LFE controller has been developed that produced both good roll and LFE attenuation using a structured design approach, which out performed a classic parallel proportional integral derivative (PID) controller. The H∞ control method proved to have advantages over more conventional approaches resulting from adaptability of the design. This benefited the activity at higher frequencies.
An experimental set up has been developed that was used successfully to test H∞ roll controllers and classical frequency response roll controllers using a small scale towed ship model. The H∞ roll controllers were found to yield similar overall roll attenuating performance in comparison to the classic controllers tested. The results from this were also used to validate a ship motion package. The software was then used to quantify the controller performances numerically.
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Published date: 2000
Identifiers
Local EPrints ID: 467002
URI: http://eprints.soton.ac.uk/id/eprint/467002
PURE UUID: 89cba807-8a79-4c53-81f1-1429bf3073c2
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Date deposited: 05 Jul 2022 08:07
Last modified: 16 Mar 2024 20:55
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Author:
Martyn Paul Prince
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