Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship

Improvement of stability has been going for decades. Anti-rolling system like bilge keel, anti-rolling tank, and weight stabilizer, those basic ideas were first proposed by researchers in the period of latter half of 19th century. While on the other hand, fin stabilizer was invented around 1920`s. S...

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Main Authors:	Ramli, Muhammad Zahir, Hirakawa, Yoshiaki
Format:	Book
Language:	English
Published:	IIUM Press, International Islamic University Malaysia 2017
Subjects:	TC Hydraulic engineering. Ocean engineering VM Naval architecture. Shipbuilding. Marine engineering
Online Access:	http://irep.iium.edu.my/63599/ http://irep.iium.edu.my/63599/ http://irep.iium.edu.my/63599/1/63599_Application%20of%20optimal%20control.pdf

id	iium-63599
recordtype	eprints
spelling	iium-635992020-01-10T03:28:20Z http://irep.iium.edu.my/63599/ Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship Ramli, Muhammad Zahir Hirakawa, Yoshiaki TC Hydraulic engineering. Ocean engineering VM Naval architecture. Shipbuilding. Marine engineering Improvement of stability has been going for decades. Anti-rolling system like bilge keel, anti-rolling tank, and weight stabilizer, those basic ideas were first proposed by researchers in the period of latter half of 19th century. While on the other hand, fin stabilizer was invented around 1920`s. Some of the ideas remain undeveloped for years while others turned out to be a successful system in years to come. Among those system there is weight stabilizer which offers wide concept of anti-rolling system. As the horizontal type has been treated as common, researchers now have pay high interest to vertical type weight stabilizer. Vertical type can change both the height of the center of gravity and the moment of inertia of the system or in other word change the radius of gyration (gyradius). By using movable weight, gyradius will change as the weight position is moved upward or downward. VWS system mass only take few percent of total ship displacement and is positioned at the back upper deck of the ship. The development of VWS is actually the key to doubts and problems from previous research. From anti-rolling tank, the result has shown that the system demands large space for the installation while from the Air Fin Stabilizer(AS) research, we found out that system has 0% efficiency in immobile state. VWS has been improved to overcome these problems and meet the requirements of more promising system. With new ideas and skills, VWS works even when the ship is at rest condition. Moreover, the space used is minimal and loads can be adjust based on ship`s condition. As the device is installed above draught level, water friction also can be reduced. VWS is controlled by PID control system which analyses GAIN`s value needed for weight’s movement. The optimization of the control system will be further discussed and confirmed by carrying out numerical and physical simulation. IIUM Press, International Islamic University Malaysia 2017 Book PeerReviewed application/pdf en http://irep.iium.edu.my/63599/1/63599_Application%20of%20optimal%20control.pdf Ramli, Muhammad Zahir and Hirakawa, Yoshiaki (2017) Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship. IIUM Press, International Islamic University Malaysia, Kuala Lumpur. ISBN 978-967-418-705-7 http://www.iium.edu.my/office/iiumpress
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TC Hydraulic engineering. Ocean engineering VM Naval architecture. Shipbuilding. Marine engineering
spellingShingle	TC Hydraulic engineering. Ocean engineering VM Naval architecture. Shipbuilding. Marine engineering Ramli, Muhammad Zahir Hirakawa, Yoshiaki Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
description	Improvement of stability has been going for decades. Anti-rolling system like bilge keel, anti-rolling tank, and weight stabilizer, those basic ideas were first proposed by researchers in the period of latter half of 19th century. While on the other hand, fin stabilizer was invented around 1920`s. Some of the ideas remain undeveloped for years while others turned out to be a successful system in years to come. Among those system there is weight stabilizer which offers wide concept of anti-rolling system. As the horizontal type has been treated as common, researchers now have pay high interest to vertical type weight stabilizer. Vertical type can change both the height of the center of gravity and the moment of inertia of the system or in other word change the radius of gyration (gyradius). By using movable weight, gyradius will change as the weight position is moved upward or downward. VWS system mass only take few percent of total ship displacement and is positioned at the back upper deck of the ship. The development of VWS is actually the key to doubts and problems from previous research. From anti-rolling tank, the result has shown that the system demands large space for the installation while from the Air Fin Stabilizer(AS) research, we found out that system has 0% efficiency in immobile state. VWS has been improved to overcome these problems and meet the requirements of more promising system. With new ideas and skills, VWS works even when the ship is at rest condition. Moreover, the space used is minimal and loads can be adjust based on ship`s condition. As the device is installed above draught level, water friction also can be reduced. VWS is controlled by PID control system which analyses GAIN`s value needed for weight’s movement. The optimization of the control system will be further discussed and confirmed by carrying out numerical and physical simulation.
format	Book
author	Ramli, Muhammad Zahir Hirakawa, Yoshiaki
author_facet	Ramli, Muhammad Zahir Hirakawa, Yoshiaki
author_sort	Ramli, Muhammad Zahir
title	Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
title_short	Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
title_full	Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
title_fullStr	Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
title_full_unstemmed	Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship
title_sort	application of optimal control in vertical weight stabilizer (vws) system for actual ship
publisher	IIUM Press, International Islamic University Malaysia
publishDate	2017
url	http://irep.iium.edu.my/63599/ http://irep.iium.edu.my/63599/ http://irep.iium.edu.my/63599/1/63599_Application%20of%20optimal%20control.pdf
first_indexed	2023-09-18T21:30:12Z
last_indexed	2023-09-18T21:30:12Z
_version_	1777412459387158528

Application of optimal control in Vertical Weight Stabilizer (VWS) system for actual ship

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