Perancangan Sistem Kendali Linear Quadratic Gaussian Pada Offshore Platform Tipe Steel Jacket Untuk Menjaga Kestabilan Platform

Maulana, Alfian Harida (2018) Perancangan Sistem Kendali Linear Quadratic Gaussian Pada Offshore Platform Tipe Steel Jacket Untuk Menjaga Kestabilan Platform. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Offshore platform tipe steel jacket merupakan bangunan lepas pantai untuk prosess eksplorasi dan eksploitasi minyak dan gas bumi. Parameter platform yang digunakan adalah panjang, kedalaman, massa, ratio redaman, dan frekuensi natural. Kestabilan platform sangat dipengaruhi oleh kondisi lingkungan seperti gangguan gelombang laut, arus laut, dan angin yang dapat menurunkan kestabilan dari platform. Pengendalian kestabilan platform dapat dilakukan dengan beberapa metode kendali. Sistem kendali Linear Quadratic Gaussian (LQG) merupakan metode yang diterapkan pada platform untuk mengendalikan kestabilannya. Parameter LQG yang dipilih adalah parameter yang menyebabkan fungsi kriteria mempunyai nilai minimum. Pengujian sistem dilakukan dengan bantuan perangkat lunak Matlab pada komputer. Terdapat 5 tahap uji yaitu uji kestabilan, uji keterkendalian, uji keteramatan, uji open loop, dan uji close loop. Pengujian close loop dilakukan dengan gangguan gelombang laut sea state 1 sampai 6 mengahasilkan nilai maksimum overshoot berturut-turut sebesar 0,453; 0,822; 2,320; 3,418; 4,258; 5,029 dan nilai eror berturut-turut sebesar 0,383; 0,663; 1,535; 1,914; 2,421; 2,965. ========================================================================Offshore platform steel jacket type is an offshore building for oil and gas exploration and exploitation process. The platform parameters used are length, depth, mass, damping ratio, and natural frequency. The stability of the platform is strongly influenced by environmental conditions such as ocean wave disruption, ocean currents, and winds that can degrade the stability of the platform. Platform stability control can be done with several control methods. Linear Quadratic Gaussian (LQG) control system is a method applied to the platform to control its stability. The selected LQG parameters are parameters that cause the criteria function to have a minimum value. System testing was done with the help of Matlab software on a computer. There are 5 stages of test those are stability test, controllability test, observability test, open loop test, and close loop test. Close loop test was done with sea wave disturbances sea state 1 to 6 resulting in maximum overshoot values of 0.453; 0,822; 2,320; 3,418; 4,258; 5,029 and error values respectively 0,383; 0.663; 1,535; 1,914; 2,421; 2,965.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Kestabilan, keterkendalian dan keteramatan, Linear Quadratic Gaussian (LQG), platform steel jacket.
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control.
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: MAULANA ALFIAN HARIDA
Date Deposited: 01 Jul 2021 07:50
Last Modified: 01 Jul 2021 07:50
URI: https://repository.its.ac.id/id/eprint/57010

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