MODEL REFERENCE ADAPTIVE CONTROL UNTUK PENGATURAN PROSES TINGGI PERMUKAAN SHPERICAL TANK
Abstract
Abstrak
Industri kimia saat ini Liquified Natural Gas (LNG) yang proses distribusinya menggunakan LNG tanker vessel dan/atau kereta pengangkut dengan wadah penyimpanan spherical tank. Sistem kendali aliran tangki LNG merupakan kendali tinggi permukaan. Parameter kontrolernya akan bekerja apabila nilai referens dijaga konstan. Faktanya adalah bahwa nilai referens (tinggi permukaan) sering keluar dari batas ambang akibat LNG yang keluar melebihi ukuran. Salah satu solusi untuk perbaikan sistem kendali itu adalah proses penalaan-ulang parameternya menggunakan sistem kendali adaptif Model Reference Adaptif Control (MRAC). Basis dari MRAC adalah metode Massachusetts Institute of technology (MIT) rules sebagai mekanisme penalaan-ulang parameter. Hasil simulasi berbasis Matlab-Simulink memperlihatkan bahwa luaran sistem sudah sesuai dengan yang diinginkan dengan settling time sebesar 4 detik, rise time sebesar 0,95 detik dan over-shoot sebesar 0,2 p.u.
Kata kunci: Liquified Natural Gas (LNG), Model Reference Adaptif Control
(MRAC). Massachusetts Institute of technology (MIT) rules.
Abstract
The chemical industry is currently Liquified Natural Gas (LNG) whose distribution process uses LNG tanker vessels and/or transport trains with spherical tank storage containers. The LNG tank flow control system is a surface level control. The controller parameter will work if the reference value is kept constant. The fact is that the reference value (surface height) is often out of the threshold due to the LNG that comes out exceeding the size. One solution for improving the control system is the parameter tuning process using the Model Reference Adaptive Control (MRAC) adaptive control system. The basis of MRAC is the Massachusetts Institute of technology (MIT) rules method as a parameter tuning mechanism. The simulation results based on Matlab-Simulink show that the system output is in accordance with the desired with a settling time of 4 seconds, a rise time of 0.95 seconds and an over-shoot of 0.2 p.u.
Keywords : Liquified Natural Gas (LNG), Model Reference Adaptif Control
(MRAC). Massachusetts Institute of technology (MIT) rules.
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