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- Title
Reliability-Centered Development of Deep Water ROY ROSUB 6000.
- Authors
Narayanaswamy, Vedachalam; Raju, Ramesh; Durairaj, Muthukumaran; Ananthapadmanabhan, Aarthi; Annamalai, Subramanian; Ramadass, Gidugu Ananada; Atmanand, Malayath Aravindakshan
- Abstract
This paper presents the reliability-centered development of a deep water Remotely Operable Vehicle (ROV) ROSUB 6000 by the National Institute of Ocean Technology (NI0T), India. ROV operations are required during deep water interven-tions, such as well head operations, emergency response situations, bathymétrie surveys, gas hydrate surveys, poly-metallic nodule exploration, and salvage oper-ations. As per our requirements, the system needs to be capable of deep water operation for a period of 300 h/year and to be extremely reliable. Methodologies applied during the development and enhancement phases of electrical and control systems, taking into consideration the cost, space, and time constraints to attain the best possible reliability are detailed. Reliability, availability, and maintainability (RAM) studies are carried out to identify possible failure cases. It is found that ROV-Tether Management System (TMS) docking failure could be detrimental to the ROV system, and manipulator system failure could be detrimental to subsea operations. It has been calculated and found that the improved design has a mean time between failure (MTBF) of 4.9 and 6.2 years for R0V-TMS docking and manipulator system operations, respectively. The importance of monitoring tether cable healthiness during normal and winding operations and the systems im-plemented for effectively monitoring and maintaining the tether cable operational and functional healthiness, using the tether cable pay-out, vehicle heading, electric insulation, and optical performance sensors with the aid of a sea battery, are dis-cussed. Maintenance decision support tables, which detail the operational person-nel for the upkeep of the systems during the indicated interval so that the highest possible reliability is maintained during the mission period, are also presented.
- Subjects
REMOTE submersibles; UNDERWATER exploration; EMERGENCY management; SYSTEM failures; MAINTAINABILITY (Engineering); RELIABILITY in engineering; EQUIPMENT &; supplies
- Publication
Marine Technology Society Journal, 2013, Vol 47, Issue 3, p55
- ISSN
0025-3324
- Publication type
Article
- DOI
10.4031/MTSJ.47.3.3