DEPARTMENT OF CIVIL ENGINEERING You are cordially invited to a seminar orized by Center for Offshore Research and Engineering, CORE and Department of Civil Engineering, NUS on Modelling and Control for the Installation of Subsea Systems by Mr Bernard, How Voon Ee Department of Civil Engineering, NUS Abstract With trend to go into deeper waters for untapped oil fields, more oil and gas extraction solutions are set to be based on floating platforms in combination with subsea production systems. Due to the need for conducting all-year marine operations in the ocean space, the application of advance control technology can help alleviate some of the challenges faced by the industry. In this seminar, modelling and control for water entry and positioning of the subsea systems will be discussed. Adaptive control of the structure subjected to hydrodynamic forces while lowering through the splash zone, is investigated using model-based and Neural Network parameterization techniques. Positioning control for the installation of subsea hardware with thrusters attached under time-varying ocean current is examined. Adaptive approximation techniques are employed in the design of the control law and the stability is demonstrated by means of a backstepping and Lyapunov synthesis approach. The proposed control is able to approximate the dominant dynamic behaviors without exact information on the hydrodynamic coefficients of the structure and current measurements. Contact Person: Prof Andrew Palmer, Tel: 6515 4601, Email: General Enquiry/Registration: Ms Norela, Tel: 6516 2149, Email:
DEPARTMENT OF CIVIL ENGINEERING You are cordially invited to a seminar orized by Center for Offshore Research and Engineering, CORE and Department of Civil Engineering, NUS on Modelling and Control for the Installation of Subsea Systems by Mr Bernard, How Voon Ee Department of Civil Engineering, NUS Abstract With trend to go into deeper waters for untapped oil fields, more oil and gas extraction solutions are set to be based on floating platforms in combination with subsea production systems. Due to the need for conducting all-year marine operations in the ocean space, the application of advance control technology can help alleviate some of the challenges faced by the industry. In this seminar, modelling and control for water entry and positioning of the subsea systems will be discussed. Adaptive control of the structure subjected to hydrodynamic forces while lowering through the splash zone, is investigated using model-based and Neural Network parameterization techniques. Positioning control for the installation of subsea hardware with thrusters attached under time-varying ocean current is examined. Adaptive approximation techniques are employed in the design of the control law and the stability is demonstrated by means of a backstepping and Lyapunov synthesis approach. The proposed control is able to approximate the dominant dynamic behaviors without exact information on the hydrodynamic coefficients of the structure and current measurements. Contact Person: Prof Andrew Palmer, Tel: 6515 4601, Email: General Enquiry/Registration: Ms Norela, Tel: 6516 2149, Email:
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