Design and Reliability Analysis of DP-3 Dynamic Positioning Control Architecture

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. 作者： Author： WANG Fang  WAN Lei  JIANG Da-peng  XU Yu-ru 作者單位： State Key Lab of A UV, Harbin Engineering University, 150001 Harbin, China 期 刊： 中國海洋工程（英文版）   ISTICEISCI Journal： China Ocean Engineering 年，卷(期)： 2011, 25(4) 分類號： U664.82 Keywords： DP-3    dynamic positioning    system reliability    triple redundancy    motion control    redundancy management    機標分類號： TP3 TP2 機標關鍵詞： Control Architecture    Dynamic Positioning    Reliability Analysis    dynamic positioning    control system    reliability    development of software    real-time    software architecture    redundancy management    dynamic simulation    computers    application layer    software control    operating system    fault detection    motion control    classification    Markov model    drilling rig 基金項目： the National Natural Science Foundation of China，the National High Technology Development Program of China Design and Reliability Analysis of DP-3 Dynamic Positioning Control Architecture[期刊論文]  中國海洋工程（英文版） --2011, 25(4)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 obje...

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