Design and implementation of a triple-redundant dynamic positioning control system for deepwater drilling rigs |
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| Institution: | 1. Department of Information Technology, National Institute of Technology, Raipur 492010, India;2. Department of Computer Science & Engineering, Indian Institute of Technology, Roorkee, India |
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| Abstract: | Triple-redundant control architecture of the main control station is proposed for dynamic positioning (DP) system from a practical point of view according to the International Maritime Organization's (IMO) DP Class 3 notation. To improve the single fault tolerance, both operator station systems and real-time control computer systems are designed with triple modular redundancy. Hierarchical software layers of the triple-redundant control architecture are implemented based on the different real-time response requirements of the layers. Input and output voting are incorporated to the positioning task to detect and isolate faults in the sensors and in the control system. Hard-in-the-loop (HIL) testing system together with model-scale tests are conducted to verify the proposed triple-redundant control architecture. The feasibility and fault-tolerant capability of the triple-redundant hardware and software architecture both in HIL and model tests are demonstrated. |
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| Keywords: | Dynamic positioning Control architecture Triple redundancy Fault tolerant Voting Deepwater drilling rig |
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