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A platform for research: civil engineering, architecture and urbanism
Real-time estimation of riser's deformed shape using inclinometers and Extended Kalman Filter
https://orcid.org/0000-0002-6753-3173
Abstract The real-time monitoring of underwater risers, cables, and mooring lines by multiple sensors is in great demand but still very challenging. In this study, a new real-time riser monitoring method based on an Extended Kalman Filter (EKF) is proposed. It estimates the overall shape of riser in real-time utilizing the measured signals from multiple bi-axial (inclination and heading) inclinometers along the riser. The novel EKF algorithm is shown to be robust against sensor noises and successfully reproduces the actual riser profiles at each time step, which has been verified by multiple tests through numerical simulations. For verification, a turret-moored FPSO (Floating Production Storage and Offloading) with a SCR (Steel Catenary Riser) is employed in four different random waves and currents. Subsequent algorithms are also developed so that the corresponding bending and axial stresses along the riser can also be estimated in real time from the obtained riser shape, which can further be used for the real-time estimation of fatigue-damage accumulation.
Highlights A new real-time riser shape monitoring method based on an Extended Kalman Filter (EKF) is developed. GPS at the riser top and multiple bi-axial inclinometers along the riser are needed to estimate riser's deformed shape. Bending and axial stresses along the riser are estimated in real-time from the obtained riser's deformed shape.
Real-time estimation of riser's deformed shape using inclinometers and Extended Kalman Filter
https://orcid.org/0000-0002-6753-3173
Abstract The real-time monitoring of underwater risers, cables, and mooring lines by multiple sensors is in great demand but still very challenging. In this study, a new real-time riser monitoring method based on an Extended Kalman Filter (EKF) is proposed. It estimates the overall shape of riser in real-time utilizing the measured signals from multiple bi-axial (inclination and heading) inclinometers along the riser. The novel EKF algorithm is shown to be robust against sensor noises and successfully reproduces the actual riser profiles at each time step, which has been verified by multiple tests through numerical simulations. For verification, a turret-moored FPSO (Floating Production Storage and Offloading) with a SCR (Steel Catenary Riser) is employed in four different random waves and currents. Subsequent algorithms are also developed so that the corresponding bending and axial stresses along the riser can also be estimated in real time from the obtained riser shape, which can further be used for the real-time estimation of fatigue-damage accumulation.
Highlights A new real-time riser shape monitoring method based on an Extended Kalman Filter (EKF) is developed. GPS at the riser top and multiple bi-axial inclinometers along the riser are needed to estimate riser's deformed shape. Bending and axial stresses along the riser are estimated in real-time from the obtained riser's deformed shape.
Real-time estimation of riser's deformed shape using inclinometers and Extended Kalman Filter
https://orcid.org/0000-0002-6753-3173
Abstract The real-time monitoring of underwater risers, cables, and mooring lines by multiple sensors is in great demand but still very challenging. In this study, a new real-time riser monitoring method based on an Extended Kalman Filter (EKF) is proposed. It estimates the overall shape of riser in real-time utilizing the measured signals from multiple bi-axial (inclination and heading) inclinometers along the riser. The novel EKF algorithm is shown to be robust against sensor noises and successfully reproduces the actual riser profiles at each time step, which has been verified by multiple tests through numerical simulations. For verification, a turret-moored FPSO (Floating Production Storage and Offloading) with a SCR (Steel Catenary Riser) is employed in four different random waves and currents. Subsequent algorithms are also developed so that the corresponding bending and axial stresses along the riser can also be estimated in real time from the obtained riser shape, which can further be used for the real-time estimation of fatigue-damage accumulation.
Highlights A new real-time riser shape monitoring method based on an Extended Kalman Filter (EKF) is developed. GPS at the riser top and multiple bi-axial inclinometers along the riser are needed to estimate riser's deformed shape. Bending and axial stresses along the riser are estimated in real-time from the obtained riser's deformed shape.
Real-time estimation of riser's deformed shape using inclinometers and Extended Kalman Filter
Kim, HanSung (author) / Jin, Chungkuk (author) / Kim, MooHyun (author)
Marine Structures ; 77
2021-01-05
Article (Journal)
Electronic Resource
English
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