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An approach to operational risk modeling and estimation of safety levels for deep water work class remotely operated vehicle-A case study with reference to ROSUB 6000

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Journal of Ocean Engineering and Science 2016年第2期1卷 109-118页

作者： N.Vedachalam R.Ramesh V.B.N.Jyothi G.A.Ramadass M.A.Atmanand National Institute of Ocean Technology ChennaiIndia

This paper presents a quantitative approach to operational risk modeling and estimation of safety integrity levels,required for the deep water electric work class remotely operated vehicle with reference to ROSUB6000 developed by the National Institute of Ocean Technology,***6000 is used for carrying out bathymetric surveys,gas hydrate surveys,poly-metallic nodule exploration,salvage operations,and meeting emergency response *** system is expected to be in operation for a period of 300 h per year,and has to be extremely safe and *** and models for the quantitative assessment of operational safety and estimation of safety integrity levels for ROV are seldom available in the deep water intervention *** safety instrumented functions implemented in the ROV should be able to meet the SIL requirements of specific *** study indicates that the required safety factors are implemented into the design of the state-of-the-art ROV ROSUB 6000,considering IEC 61508/61511 recommendations on Health,Safety and Environment and it is found that the system is able to meet the required SIL for seven identified *** paper gives the design and safety engineers in the ROV industry,an overview of the numerical operational risk assessment methods and safety-centered ROV engineering.

关键词： remotely operated vehicle HSE Safety integrity level Safety instrumented function

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Multivariable fast nonsingular terminal sliding mode control for remotely operated vehicle

Multivariable fast nonsingular terminal sliding mode control...

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第36届中国控制会议

作者： Song Liang Fei Wu Guangyi Zhang Xiaoqiang Dai Qingjun Zeng School of Electronics and Information Jiangsu University of Science and Technology No.704 Institute of China Shipbuilding Industry Corporation(CSIC)

ISBN: (纸本)9781538629185

remotely operated vehicle（ROV） need to maintain the stability of the ROV body as much as possible to achieve efficient operation,so the ROV dynamic positioning technology is essential.A new multivariable fast nonsingular terminal sliding mode control（MFNTSM） method is proposed for the problem that global convergence of the nonsingular terminal sliding mode control（NTSM） method is *** six-degree-of-freedom motion model of our ROV is established based on the hydrodynamic coefficients calculated by the pool experiment and numerical ***,the new sliding mode controller（MFNTSM） is simulated and compared with the NTSM under the condition of static water and *** results show that the MFNTSM controller has better convergence speed and better robust performance than the NTSM controller in the dynamic positioning system.

关键词： Sliding Mode Control MFNTSM Multivariable Control Dynamic Positioning remotely operated vehicle

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Development of a Robot for In-service Radiography Inspection of Subsea Flexible Risers

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Journal of Artificial Intelligence and Technology 2021年第3期1卷 180-187页

作者： Aman P.Kaur Tariq Sattar Richard Anvo Mohammad Osman Tokhi School of Engineering London South Bank UniversityLondonUK

The extreme operational environmental conditions and aging conditions of subsea structures pose a risk to their structural integrity and is critical to their *** testing is essential to identify defects developing within the structure,allowing repair in a timely manner to mitigate against failures that cause damage to the environment and pose a hazard to human ***,to be cost effective,inspections must be carried out without taking the risers out of *** poses significant safety risks if undertaken *** paper presents the development of an automated inspection system for flexible risers that are used to connect wellheads on the seafloor to the offshore production and storage *** to the complex structure of risers,radiography is considered as the best technique to inspect multiple layers of the ***,radiography inspection,in turn,requires a robotic system for in-situ inspection with higher payload capacity,precise movement of source and detector which is able to withstand an extreme operational *** deployment of a radiography inspection system hasbeen achieved bydeveloping acustomized subsearobotic system called RiserSure that can provide precise scanning motion of a gamma ray source and digital detector moving in *** prototype has been tested on a flexible riser during shallow water sea trials with the system placed around a riser by a remotely operated *** results from the trials show that the internal inner and outer tensile armor layer and defects in the riser can be successfully imaged in real operational conditions.

关键词： flexible riser nondestructive testing remotely operated vehicle robotic scanning system subsea controlled area network real-time control

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沉船Ievoli Sun号水下液货燃油遥控回收

沉船Ievoli Sun号水下液货燃油遥控回收

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救捞专业委员会2004年学术交流会

作者： FRANK MOHN CHINA LTD FRANK MOHN CHINA LTD

本文主要介绍了利用FRAMO公司的ROLS装置对Ievoli Sun号沉船舱内的液货燃油进行遥控关键词:上底板,下底板,遥控水下机器人,双层底工具,带开孔机的泵,螺栓钻孔机.回收的案例。

关键词： Upper Base Plate Lower Base Plate remotely operated vehicle Double Bottom Tool Pump with Milling Unit Drilling Machine.

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