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Mogens Blanke - One of the best experts on this subject based on the ideXlab platform.

  • l1 adaptive manoeuvring control of unmanned high speed Water Craft
    IFAC Proceedings Volumes, 2012
    Co-Authors: Casper H Svendsen, Niels Ole Hoick, Roberto Galeazzi, Mogens Blanke
    Abstract:

    Abstract This work addresses the issue of designing an adaptive robust control system to govern the steering of a high speed unmanned personal WaterCraft (PWC) maintaining equal performance across the Craft's envelope of operation. The maneuvering dynamics of a high speed PWC is presented and a strong variation over the envelope of operational conditions, including speed, is highlighted. The complexity of the nonlinear dynamics is overcome through identification of linear models at different speed regimes. A gray-box identification is conducted from full scale experiments and results in a four degrees-of-freedom surge-sway-yaw-roll model. An L 1 adaptive autopilot is then designed, which allows to achieve fast adaption to system parameters’ changes and robustness of the closed loop system.

Irmansyah Teuku - One of the best experts on this subject based on the ideXlab platform.

  • Analisa Risiko Pada Free Fall Lifeboat Launching Dengan Mengunakan Metode FMEA
    2016
    Co-Authors: Irmansyah Teuku
    Abstract:

    Sekoci adalah salah satu peralatan yang menyelamatkan jiwa yang paling penting onboard kapal, yang digunakan pada saat darurat ekstrim untuk meninggalkan kapal. Sekoci adalah kapal kecil yang kaku, dijamin onboard, ke davits sehingga dapat diluncurkan ke sisi kapal dengan sedikit waktu dan bantuan mekanik mungkin untuk melarikan diri awal kru dari kapal. Dalam dekade sejak itu menjadi persyaratan bahwa peralatan menyelamatkan nyawa tersedia untuk semua orang di kapal, banyak fitur desain sekoci dan sistem peluncuran mereka telah berubah. Ini biasanya telah dalam menanggapi tuntutan untuk kapasitas yang lebih besar sekoci, perlindungan yang lebih besar bagi mereka yang menggunakan mereka, kemudahan pengoperasian dan keselamatan ditingkatkan. Sebuah sekoci harus membawa semua peralatan yang diuraikan di bawah kode SOLAS dan LSA, yang lulus untuk kelangsungan hidup di laut. Ini termasuk jatah, air tawar, pertolongan pertama, kompas, distress peralatan sinyal seperti roket dll Sebuah kapal harus membawa satu perahu penyelamat untuk tujuan 12 penyelamatan, bersama dengan sekoci lainnya. Salah satu sekoci dapat ditunjuk sebagai perahu penyelamat, jika lebih dari dua atau lebih sekoci yang hadir onboard kapal a. sekoci adalah kerajinan air yang digunakan untuk membantu penumpang di perahu dan kapal dalam kesulitan. Ini adalah kerajinan kecil di atas kapal laut untuk memungkinkan melarikan diri darurat. Sebuah sekoci adalah jenis kapal yang digunakan untuk melarikan diri struktur tenggelamnya lebih besar seperti kapal pesiar, kapal komersial, atau pesawat yang telah mendarat di air. Sebuah sekoci adalah perahu kecil, kaku atau tiup dilakukan untuk evakuasi darurat dalam hal terjadi bencana di kapal. Penelitian ini bertujuan untuk memperoleh risiko yang dapat dihasilkan dari Lifeboat selama peluncuran dan operasi pemulihan menggunakan metode FMEA dan mendapatkan tingkat prioritas risiko siapa risiko yang dapat diterima, risiko ditolerir atau berisiko tinggi. Lalu bagaimana untuk meminimalkan kategori risiko tinggi untuk mencegah kecelakaan menggunakan Lopa. Menggunakan Mode Kegagalan dan Efek Metode Analisis (FMEA) untuk penilaian risiko. ======================================================================================================== Lifeboat is one of the most important life-saving equipment onboard a ship, which is used at the time of extreme emergencies for abandoning a ship. Lifeboat is a smaller rigid vessel, secured onboard into davits so that it can be launched over the side of the ship with least time and mechanical assistance possible for an early escape of the crew from the ship. In the decades since it became a requirement that lifesaving appliances are available for everyone on board a vessel, many design features of lifeboats and their launching systems have changed. These have usually been in response to the demands for larger lifeboat capacity, greater protection for those using them, ease of operation and enhanced safety. A lifeboat must carry all the equipment described under SOLAS and LSA codes, which are passed for the survival at sea. This includes rations, fresh Water, first aid, compass, distress signaling equipment like rocket etc. A ship must carry one rescue boat for the rescuing purpose, along with other lifeboats. One of the lifeboats can be designated as a rescue boat, if more than two or more lifeboats are present onboard a ship. The lifeboat is a Water Craft used to help passengers on boats and ships in trouble. It is a small Craft aboard a ship to allow for emergency escape. A lifeboat is a kind of boat that 10 is used to escape a larger sinking structure such as a cruise ship, commercial vessel, or airCraft that has landed in the Water. A lifeboat is a small, rigid or inflatable WaterCraft carried for emergency evacuation in the event of a disaster aboard ship

  • Free Fall Lifeboat Launching Risk Assessment Using Failure Modes And Effects Analysis Method
    2016
    Co-Authors: Irmansyah Teuku
    Abstract:

    Sekoci adalah salah satu peralatan yang menyelamatkan jiwa yang paling penting onboard kapal, yang digunakan pada saat darurat ekstrim untuk meninggalkan kapal. Sekoci adalah kapal kecil yang kaku, dijamin onboard, ke davits sehingga dapat diluncurkan ke sisi kapal dengan sedikit waktu dan bantuan mekanik mungkin untuk melarikan diri awal kru dari kapal. Dalam dekade sejak itu menjadi persyaratan bahwa peralatan menyelamatkan nyawa tersedia untuk semua orang di kapal, banyak fitur desain sekoci dan sistem peluncuran mereka telah berubah. Ini biasanya telah dalam menanggapi tuntutan untuk kapasitas yang lebih besar sekoci, perlindungan yang lebih besar bagi mereka yang menggunakan mereka, kemudahan pengoperasian dan keselamatan ditingkatkan. Sebuah sekoci harus membawa semua peralatan yang diuraikan di bawah kode SOLAS dan LSA, yang lulus untuk kelangsungan hidup di laut. Ini termasuk jatah, air tawar, pertolongan pertama, kompas, distress peralatan sinyal seperti roket dll Sebuah kapal harus membawa satu perahu penyelamat untuk tujuan12 penyelamatan, bersama dengan sekoci lainnya. Salah satu sekoci dapat ditunjuk sebagai perahu penyelamat, jika lebih dari dua atau lebih sekoci yang hadir onboard kapal a. sekoci adalah kerajinan air yang digunakan untuk membantu penumpang di perahu dan kapal dalam kesulitan. Ini adalah kerajinan kecil di atas kapal laut untuk memungkinkan melarikan diri darurat. Sebuah sekoci adalah jenis kapal yang digunakan untuk melarikan diri struktur tenggelamnya lebih besar seperti kapal pesiar, kapal komersial, atau pesawat yang telah mendarat di air. Sebuah sekoci adalah perahu kecil, kaku atau tiup dilakukan untuk evakuasi darurat dalam hal terjadi bencana di kapal. Penelitian ini bertujuan untuk memperoleh risiko yang dapat dihasilkan dari Lifeboat selama peluncuran dan operasi pemulihan menggunakan metode FMEA dan mendapatkan tingkat prioritas risiko siapa risiko yang dapat diterima, risiko ditolerir atau berisiko tinggi. Lalu bagaimana untuk meminimalkan kategori risiko tinggi untuk mencegah kecelakaan menggunakan Lopa. Menggunakan Mode Kegagalan dan Efek Metode Analisis (FMEA) untuk penilaian risiko. =========================================================================================================== Lifeboat is one of the most important life-saving equipment onboard a ship, which is used at the time of extreme emergencies for abandoning a ship. Lifeboat is a smaller rigid vessel, secured onboard into davits so that it can be launched over the side of the ship with least time and mechanical assistance possible for an early escape of the crew from the ship. In the decades since it became a requirement that lifesaving appliances are available for everyone on board a vessel, many design features of lifeboats and their launching systems have changed. These have usually been in response to the demands for larger lifeboat capacity, greater protection for those using them, ease of operation and enhanced safety. A lifeboat must carry all the equipment described under SOLAS and LSA codes, which are passed for the survival at sea. This includes rations, fresh Water, first aid, compass, distress signaling equipment like rocket etc. A ship must carry one rescue boat for the rescuing purpose, along with other lifeboats. One of the lifeboats can be designated as a rescue boat, if more than two or more lifeboats are present onboard a ship. The lifeboat is a Water Craft used to help passengers on boats and ships in trouble. It is a small Craft aboard a ship to allow for emergency escape. A lifeboat is a kind of boat that10 is used to escape a larger sinking structure such as a cruise ship, commercial vessel, or airCraft that has landed in the Water. A lifeboat is a small, rigid or inflatable WaterCraft carried for emergency evacuation in the event of a disaster aboard ship

Kenneth R Jones - One of the best experts on this subject based on the ideXlab platform.

  • self balancing remote sensing device and remote sensing system comprising same
    2010
    Co-Authors: Kenneth R Jones
    Abstract:

    A self-balancing remote sensing device, and a system comprised of the remote sensing devices and one or more base stations, is provided for remotely monitoring both terrestrial and maritime environments. Specifically, a spherically-shaped self-balancing remote sensing device having one or more cameras and various sensors is provided, which may ascend and descend within the Water column as desired, by altering its buoyancy, while maintaining proper orientation of the camera and sensors. Further, the remote sensing system comprised of the devices and base stations is provided, wherein the devices and base stations may form an ad hoc network, thereby greatly extending the range and coverage of the system. The devices, due to their small size, may be quickly and easily deployed using various vehicles, including flight vehicles, land-based vehicles, Water Craft, and subsurface Water vehicles.

Naidoo, Justin Edwin. - One of the best experts on this subject based on the ideXlab platform.

  • Modelling, design and analysis of a Water jetpack powered by an autonomous underWater vehicle (AUV) system.
    2017
    Co-Authors: Naidoo, Justin Edwin.
    Abstract:

    Master of Science in Mechanical Engineering. University of KwaZulu-Natal, Pietermaritzburg 2017.This dissertation describes the development and analysis of a Water jetpack powered by an AUV system. The UKZN Water jetpack has been in development since 2015 and has demonstrated the ability and potential for high performance flight characteristics from tests conducted during the first phase of its development. The objective of the current research is to develop a series of static and dynamic models such as to optimize the performance, efficiency and functionality of the Water jetpack along with the development of an AUV concept to serve as a duel controlled power unit to the Water jetpack. In particular, this dissertation details the development of an initial proposed Water jetpack and AUV system computational model concept, together with static and dynamic modelling, mechanical and control system model development, as well as technical analysis of the Water jetpack and AUV system for futuristic development and implementation. A Water jetpack propulsion system utilizes a feed hose which links the Water jetpack to a separately tethered power unit, generally referred to as a personal Water Craft (PWC), which requires either secondary pilot control or tension-type tethering in the feed hose to enable the power unit to track the global positioning system (GPS) coordinates and match the dynamic state of the Water jetpack. An AUV is an air independent propulsion (AIP) Craft with the ability of GPS tracking, multi-degree of freedom control and simultaneously functioning as a PWC for the Water jetpack system. Research and analysis into the development of Water jetpack’s, AUV’s, fluid dynamics, mechatronics and hydrogen AIP is presented in the study. From the research conducted, it is deduced that the aerodynamic stability and performance of a Water jetpack is strongly dependent on the precise control of the mass flow rate, thrust vectoring, tracking and propulsion efficiency of the system. A series of non-transient models were developed and programmed as an optimization code on MATLAB to verify the geometric flow area range and performance of the Water jetpack propulsion system under peak steady state conditions. Development of the combined system control system consisted of modelling the open-loop first and second-order one-, two- and three-dimensional dynamic equations of the Water jetpack and AUV on MATLAB Simulink. The open-loop system responses show there is a high degree of aerodynamic instability in the system due to a large overshoot and settling time. Proportional-integral-derivative (PID) controllers were implemented in each open-loop model to form closed-loop feedback control models of the Water jetpack and AUV system such that a pilot can attain steady state aerodynamic stability and the AUV can track the GPS coordinates and dynamic state of the Water jetpack. The system was modelled and simulated to reach a peak flight altitude of 10 m at which the system attains steady state control. The absolute peak condition for the Water jetpack and AUV combined system is flight altitude of 10 m and flight velocity of 15 m/s. The development of the optimization code of the Water jetpack propulsion system allowed for determining the system parameters used in the open and closed Simulink models. The development of the control system model and simulations conducted yielded a fully automated Water jetpack and AUV system with optimized flight and aerodynamic performance. A computational model of the system was developed using SolidWorks and optimized as a function of mass, numerical and statistical performance. Thereafter, a series of detailed Computational Fluid Dynamics (CFD) and Finite Element Analyses (FEA) were performed to verify fluid flow optimization and structural integrity of the Water jetpack propulsion system and AUV hull model under peak conditions that the system would be subjected to. The outcome of this study is the initial idea and theoretical analysis for a Water jetpack and AUV system arising from fundamental theory, system modelling, system architecture, detailed analysis and an initial computational model for future development of the system

Sun-hwa Nam - One of the best experts on this subject based on the ideXlab platform.

  • Water quality standards for the protection of human health and aquatic ecosystems in Korea: current state and future perspective
    Environmental Science and Pollution Research, 2018
    Co-Authors: Jin Il Kwak, Sun-hwa Nam
    Abstract:

    Since the Korean Ministry of the Environment established the Master Plan for Water Environment (2006–2015), the need to revise the Water quality standards (WQSs) has driven government projects to expand the standards for the protection of human health and aquatic ecosystems. This study aimed to provide an historical overview of how these WQSs were established, amended, and expanded over the past 10 years in Korea. Here, major projects related to national monitoring in rivers and the amendment of WQSs were intensely reviewed, including projects on the categorization of hazardous chemicals potentially discharged into surface Water, the chemical ranking and scoring methodology for surface Water (Craft, Chemical RAnking of surFace Water polluTants), whole effluent toxicity (WET) management systems, the 4th, 5th, and 6th revisions of the Water quality standards for the protection of human health, and efforts toward developing the 7th revision. In this review, we assimilated the past and current status as well as future perspectives of Korean surface WQSs. This research provides information that aids our understanding of how surface WQSs have been expanded, and how scientific approaches to ensure Water quality have been applied at each step of the process in Korea.