Design and reliability analysis of DP-3 dynamic positioning control architecture |
| |
Authors: | Fang Wang Lei Wan Da-peng Jiang Yu-ru Xu |
| |
Institution: | State Key Lab of AUV,Harbin Engineering University,150001 Harbin,China |
| |
Abstract: | As the exploration and exploitation of oil and gas proliferate throughout deepwater area, the requirements on the reliability
of dynamic positioning system become increasingly stringent. The control objective ensuring safety operation at deep water
will not be met by a single controller for dynamic positioning. In order to increase the availability and reliability of dynamic
positioning control system, the triple redundancy hardware and software control architectures were designed and developed
according to the safe specifications of DP-3 classification notation for dynamically positioned ships and rigs. The hardware
redundant configuration takes the form of triple-redundant hot standby configuration including three identical operator stations
and three real-time control computers which connect each other through dual networks. The function of motion control and redundancy
management of control computers were implemented by software on the real-time operating system VxWorks. The software realization
of task loose synchronization, majority voting and fault detection were presented in details. A hierarchical software architecture
was planed during the development of software, consisting of application layer, real-time layer and physical layer. The behavior
of the DP-3 dynamic positioning control system was modeled by a Markov model to analyze its reliability. The effects of variation
in parameters on the reliability measures were investigated. The time domain dynamic simulation was carried out on a deepwater
drilling rig to prove the feasibility of the proposed control architecture. |
| |
Keywords: | DP-3 dynamic positioning system reliability triple redundancy motion control redundancy management |
本文献已被 CNKI SpringerLink 等数据库收录! |
| 点击此处可从《中国海洋工程》浏览原始摘要信息 |
| 点击此处可从《中国海洋工程》下载免费的PDF全文 |