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Written by Arjuna Balasuriya, Sardha Wijesoma, Bharath Kalyan, Thomas Lim
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Saturday, 04 July 2009 |
1. Introduction
In order to explore the vaguely understood, wide and deep underwater environment, which covers two thirds of our planet, it is necessary to navigate to different locations [4]. The importance of underwater exploration lies on the fact that the underwater environment is rich with hard mineral and renewable resources, and oil/gas reserves. |
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Last Updated ( Saturday, 04 July 2009 )
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Written by Professors Chrys Chryssostomidis and Henrik Schmidt - MIT
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Saturday, 06 June 2009 |
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Autonomous underwater vehicles (AUVs) are robotic mobile instrument carriers that have independent propulsion, sensors, and “intelligence,” allowing them to successfully complete sampling and survey tasks with little or no human intervention.
MIT built its first AUV in 1973. With explosive developments in artificial intelligence, control theory, and computer hardware, totally autonomous underwater vehicles have become a reality. Such technology provides the scientific and engineering communities with an extremely versatile, cost-effective technology, capable of accessing previously inaccessible ocean locations. Underwater vehicles are also extremely important tools for the offshore industry, where inspection of submerged structures is crucial to both human safety and the protection of the environment.
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Last Updated ( Wednesday, 01 July 2009 )
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Written by Faisal Sagala
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Thursday, 21 February 2008 |
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1. Background At work in monitoring area ( monitoring), human being assisted by various equipments which can be accessed with the high speed with the good accuration. Appliance for the acquisition of data have a lot of sold by manufacturer. Unhappily the appliance of mean is foreign made of like Japan, American, and Canada. Local Brand Appliance is which of a kind can be told by not yet in Indonesia. |
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Last Updated ( Monday, 10 March 2008 )
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Written by Administrator
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Tuesday, 02 June 2009 |
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Generally experiments in a test tank are carried out in advance to get the dynamic characteristic of underwater robots, and various motion control laws are evaluated based on obtained dynamics of the robot. In this study, we made a small and lightweight AUV as a testbed for control performance evaluation. The AUV has two modes, “cruising mode” in which the motion is controlled by lift force of the main wings, and “hovering mode” controls the heave motion by rotating both thrusters to vertical direction. Mounted instruments are limited in necessary minimum quantity aiming at the smaller AUV. In the AUV, two servo motors and two thrusters are mounted for motion control. The servo motors control the angles of thrusters and main wings, where the two thrusters are attached.
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Last Updated ( Wednesday, 01 July 2009 )
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Written by TrenSains
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Monday, 25 May 2009 |
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Logika fuzzy yang pertama kali diperkenalkan oleh Lotfi A. Zadeh, memiliki derajat keanggotaan dalam rentang 0(nol) hingga 1(satu), berbeda dengan logika digital yang hanya memiliki dua nilai yaitu 1(satu) atau 0(nol). Logika fuzzy digunakan untuk menerjemahkan suatu besaran yang diekspresikan menggunakan bahasa (linguistic), misalkan besaran kecepatan laju kendaraan yang diekspresikan dengan pelan, agak cepat, cepat dan sangat cepat. |
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Last Updated ( Saturday, 06 June 2009 )
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Written by TrenSains
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Monday, 25 May 2009 |
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Neuro-fuzzy adalah gabungan dari dua sistem yaitu sistem logika fuzzy dan jaringan syaraf tiruan. Sistem neuro-fuzzy berdasar pada sistem inferensi fuzzy yang dilatih menggunakan algoritma pembelajaran yang diturunkan dari sistem jaringan syaraf tiruan. Dengan demikian, sistem neuro-fuzzy memiliki semua kelebihan yang dimiliki oleh sistem inferensi fuzzy dan sistem jaringan syaraf tiruan. Dari kemampuannya untuk belajar maka sistem neuro-fuzzy sering disebut sebagai ANFIS (adaptive neuro fuzzy inference systems) |
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Last Updated ( Saturday, 06 June 2009 )
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Written by Arthur Sanderson (RPI) & D. Richard Blidberg (AUSI)
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Monday, 15 June 2009 |
During 2008, the RiverNet Project has focused on the development of algorithms for multivehicle navigation and cooperative behaviors. Solar-power AUV (SAUV) technology offers the capability of long-term deployment of undersea vehicles for
observation and monitoring of physical, chemical, and biological features and events with application to a variety of security, defense, and environmental missions. In this approach, a SAUV vehicle is required to surface for periods to recharge, then can resubmerge. While a single vehicle can carry out such a mission, the use of multiple vehicles (typically three or more) extends the capabilities in two ways [23]. First, at least one vehicle may be submerged at all times, providing continuous monitoring. Second, the vehicles may be dynamically reconfigured to improve navigation capability of the group. |
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Last Updated ( Wednesday, 01 July 2009 )
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