A cyber-physical framework for fault-tolerant engine speed control of a large marine engine

Large two-stroke marine engines are essential for global shipping, but their susceptibility to faults poses risks. Existing research on fault diagnosis and fault-tolerant control (FTC) for these engines lacks a comprehensive approach. This paper presents a holistic FTC strategy, systematically addressing sensor, actuator, and component faults. A model-based ship simulation is used for structural analysis and the design of fault diagnosis models. This not only identifies faults but quantifies their impact on engine operation. Additionally, optimal sensor placement is investigated to enhance fault diagnosis across the engine system. These diagnosis models are integrated into a supervisory FTC scheme, allowing reconfiguration in response to faults. Extensive simulation results demonstrate the effectiveness of this approach in maintaining safe engine speed control under various fault scenarios, successfully diagnosing and reconfiguring multiple sensor faults. This research provides a novel framework for improving the safety and reliability of large marine engines, addressing a critical need in the maritime industry.