Perancangan Active Fault Tolerant Control (AFTC) Pada Custody Transfer Simulation Di PEM Akamigas Cepu Dengan Kesalahan Pada Sensor Dan Aktuator

Alifianto, Hafid (2021) Perancangan Active Fault Tolerant Control (AFTC) Pada Custody Transfer Simulation Di PEM Akamigas Cepu Dengan Kesalahan Pada Sensor Dan Aktuator. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Custody transfer adalah sebuah sistem untuk mentransfer sebuah fluida antara operator yang berbeda. Performansi custody transfer tidak lepas dari kerja aktuator dan sensornya karena umumnya digunakan pada fluida hidrokarbon dengan harga tinggi. Ketidakpastian pengukuran dan kesalahan (fault) harus diminimalisir untuk menghindari kerugian baik penjual maupun pembeli. Kesalahan tersebut dapat ditoleransi dengan sistem Active Fault Tolerant Control (AFTC). Penelitian ini menggunakan pengendalian level tangki untuk mencapai tujuan tersebut. Tahap awal dilakukan pemodelan matematis untuk mendapatkan model state space sistem. Setelah pengujian open loop, pengendali PI dirancang sebagai nominal control. Selanjutnya, dilakukan perancangan observer sebagai estimator state sistem. Hasil estimasi digunakan untuk merekonfigurasi kontrol dengan melakukan mekanisme kompensasi ketika terjadi kesalahan. Semua uji performansi menunjukkan AFTC dapat memperoleh hasil error yang mendekati 0% meskipun terjadi kesalahan pada sensor, aktuator, atau keduanya. Sedangkan pengendalian tanpa AFTC menghasilkan respon dengan error terhadap setpoint sebesar 48,12% pada kesalahan sensitivitas sensor 100%. Pada uji kesalahan aktuator, AFTC dapat mencapai setpoint 192 detik lebih cepat apabila dibandingkan dengan pengendalian tanpa AFTC pada uji loss of effectiveness 75%. AFTC dapat menjaga sistem Custody Transfer tetap memenuhi standar 1% pada transfer gas alam dan standar 0,25% pada produk petroleum cair yang ditetapkan oleh standar ISO 13623:2017

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Custody transfer is a system for transferring a fluid between different carriers. Custody transfer performance cannot be separated from the work of the actuator and sensor because it is generally used in high-priced hydrocarbon fluids. Measurement uncertainty and errors must be minimized to avoid losses for both the seller and the buyer. Such errors can be tolerated with the Active Fault Tolerant Control (AFTC) system. This research uses tank level control to achieve this goal. The initial stage is mathematical modeling to obtain a state space model of the system. After open loop testing, the PI controller is designed as nominal control. Next, the observer is designed as a system state estimator. The estimation results are used to reconfigure the control by performing a compensation mechanism when an error occurs. All performance tests show that the AFTC can get close to 0% error results even if there is a fault with the sensor, actuator, or both. While the control without AFTC produces a response with an error of 48.12% to the setpoint at the sensor sensitivity error of 100%. In the actuator error test, AFTC can reach a setpoint 192 seconds faster when compared to control without AFTC in the 75% loss of effectiveness test. AFTC can keep the Custody Transfer system compliant with the 1% standard on natural gas transfers and the 0.25% standard on liquefied petroleum products defined by the ISO 13623:2017 standard.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Custody Transfer, Active Fault Tolerant Control, Observer, Pengendalian PI
Subjects:	Q Science > QA Mathematics > QA76.9.F38 Fault-tolerant computing T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control. T Technology > TJ Mechanical engineering and machinery > TJ217.2 Robust control
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Hafid Alifianto
Date Deposited:	23 Aug 2021 01:58
Last Modified:	23 Aug 2021 01:58
URI:	http://repository.its.ac.id/id/eprint/88616

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