Antasena, Muhammad Hagie (2024) Perancangan Sistem Kendali Position Keeping Pada Platform Offshore Semisubmersible Menggunakan Linear Quadratic Gaussian. Other thesis, Insititut Teknologi Sepuluh Nopember.
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Abstract
Penemuan akan lapangan minyak lepas pantai atau offshore dimulai pada tahun 1940 mengalami kemajuan pesat. Sejak instalasi dari platform pertama di Gulf of Mexico lebih dari 50 tahun lalu, industri offshore terlihat terbentuk banyak struktur inovatif, fixed dan floating, ditempatkan dalam kedalaman yang menerus dalam perairan dalam dan lebih banyak tantangan dan lingkungan yang agresif. Floating platform harus dijaga untuk tetap seimbang pada permukaan laut di atas sumur untuk menyelesaikan drilling, operasi completion dan/atau workover. Pada penelitian ini dirancang sebuah sistem kendali position keeping menggunakan linear quadratic gaussian yang meninjau platform offshore semisubmersible dengan aktuator yang digunakan yaitu azimuth thruster. Spesifikasi sistem yang digunakan dalam perancangan yaitu platform offshore Atlantis PQ. Penelitian dimulai dengan melakukan pemodelan terhadap dinamika platform, pemodelan aktuator, pemodelan gelombang dan dilanjut dengan pemodelan sistem. Pemodelan sistem yang terbentuk kemudian dilakukan analisis terhadap keterkendalian dan keteramatan sebelum perancangan sistem kendali. Berdasarkan hasil perancangan sistem kendali yang dibuat, didapatkan bahwa sistem dengan gangguan dapat mencapai kestabilan pada waktu di 146,05 detik terhadap gaya surge dan 119,21 detik terhadap gaya sway. Jika meninjau hasil plot yang dilakukan, posisi platform sempat pada waktu tertentu berada pada posisi yellow zone tetapi tetap dapat berhenti posisinya pada green zone.
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The discovery of offshore oil fields began in the 1940s and experienced rapid progress. Since the installation of the first platform in the Gulf of Mexico more than 50 years ago, the offshore industry has seen the formation of many innovative structures, both fixed and floating, placed at ever-increasing depths in deep waters and more challenging and aggressive environments. Floating platforms must be maintained in balance on the sea surface above the well to complete drilling, completion, and/or workover operations. In this research, a position-keeping control system using a linear quadratic Gaussian (LQG) approach is designed for a semisubmersible offshore platform with azimuth thrusters as the actuators. The system specifications used in the design are based on the Atlantis PQ offshore platform. The research begins with modeling the platform dynamics, actuator modeling, wave modeling, and continues with system modeling. The formed system model is then analyzed for controllability and observability before designing the control system. Based on the designed control system, it is found that the system with disturbances can achieve stability in 146.05 seconds against surge forces and 119.21 seconds against sway forces. Reviewing the plot results, the platform position was at times in the yellow zone but ultimately was able to stop in the green zone.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Linear Quadratic Gaussian, Platform Lepas Pantai, Sistem Kendali, Sistem Posisi Dinamik, Control Systems, Dynamic Positioning System, Linear Quadratic Gaussian, Offshore Platforms |
| Subjects: | T Technology > T Technology (General) > T11 Technical writing. Scientific Writing T Technology > T Technology (General) > T57.62 Simulation T Technology > T Technology (General) > T57.83 Dynamic programming |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Hagie Antasena |
| Date Deposited: | 28 Jul 2024 14:07 |
| Last Modified: | 28 Jul 2024 14:07 |
| URI: | http://repository.its.ac.id/id/eprint/109214 |
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