Perancangan Active Fault Tolerance Control Dengan Kesalahan Sensor Dan Aktuator Pada Pengendalian Temperatur Gasoline Splitter Column (11C8) Fuel Oil Complex I PT. Pertamina (Persero) RU IV Cilacap

Abshari, Arina Vidya (2016) Perancangan Active Fault Tolerance Control Dengan Kesalahan Sensor Dan Aktuator Pada Pengendalian Temperatur Gasoline Splitter Column (11C8) Fuel Oil Complex I PT. Pertamina (Persero) RU IV Cilacap. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu permasalahan yang sering terjadi pada hampir semua sistem pengendalian termasuk pengendalian temperature adalah kesalahan pada komponen kontrol. Sensor temperatur yang digunakan untuk mengukur besarnya suhu pada tray 18 Gasoline Splitter Column di PT.Pertamina (Persero) RU IV Cilacap mengalami kesalahan pembacaan dengan error sebesar 0,05% jika dilihat dari data hasil kalibrasi sensor. Serta kesalahan bukaan control valve yang mengatur besarnya laju aliran reflux. Pada Tugas Akhir ini dilakukan perancangan sistem kontrol yaitu active fault tolerance control (AFTC) yang mampu mempertahankan performansi sistem ketika terjadi kesalahan sensor maupun aktuator dengan melakukan rekonfigurasi sinyal kontrol. Langkah awal yang dilakukan adalah menemukan fungsi transfer dari plant melalui pendekatan FOPDT dengan bantuan software HYSYS. Selanjutnya merancang kontrol PID dan merancang observer untuk sensor serta aktuator. Langkah terakhir adalah melakukan rekonfigurasi sinyal kontrol untuk sensor serta aktuator. Hasil simulasi menunjukkan bahwa sistem dengan algoritma AFTC dapat mengatasi kesalahan sensor seperti kesalahan bias, sensitivitas dan noise serta kesalahan aktuator seperti kebocoran dan lost of effectiveness. Kedua uji tersebut menghasilkan performansi yang lebih baik dibandingkan dengan sistem pengendali PID tanpa AFTC. Hal ini dapat dilihat dari beberapa parameter seperti maximum overshoot, maximum undershoot, error steady state dan settling time. Salah satu bukti untuk uji kesalahan sensor terlihat pada hasil uji bias sebesar -0,75%, pada PID tanpa AFTC sistem tersebut menghasilkan maximum overshoot yang lebih besar yaitu 6,91% dan settling time yang lebih lama yaitu 9579 detik. Sedangkan pada sistem PID dengan AFTC maximum overshoot hanya sebesar 0,06% dengan time settling 7109 detik. ===================================================================================== One of the problem that happened in all control system, including temperature control system is fault on control components. Sensor which is used to measure the temperature of 18th tray Gasoline Splitter Column in PT.Pertamina (Persero) RU IV Cilacap goes wrong reading and has an error of 0,05% when seen from the datasheet of calibration sensor. And also fault of control valve that caused by wrong opening percentage of flow valve that control flow rate of the reflux. This final project is design the control system which call active fault tolerant control (AFTC) who is able to improve their performance when there is a fault of sensor and actuator. They do reconcfiguration control to fix it. The first step is to find the transfer function of plant with FOPDT approxiamate that is helped by HYSIS software. The second step is to design the PID control and design the observer for sensor and actuator. The final step is to reconfigure the control system of sensor and actuator. The simulation results show that AFTC algorithm can cover the fault that caused by sensor example bias, sensitivity and noise. It’s also can cover the fault that caused by actuator like leak of control valve and lost of effectiveness. Based on the experiment PID with AFTC give better performance than control system without AFTC. It is showed by several parameters , there are maximum overshoot, maximum undershoot, error steady state and settling time. One of the test results that prove it can be showed from bias sensor fault - 0.75%. The system of PID without AFTC generates greater overshoot maximum is 6.91% and longer settling time is 9579 seconds. While the PID system with AFTC give maximum overshoot is 0.06% , with settling time is 7109 second.

Item Type: Thesis (Undergraduate)
Additional Information: RSF 629.89 Abs p
Uncontrolled Keywords: active fault tolerant control, kontrol PID, Gasoline Splitter Column, PID control
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521.3 Automatic Control
Divisions: Faculty of Industrial Technology > Physics Engineering > (S1) Undergraduate Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 19 Jul 2017 02:07
Last Modified: 26 Dec 2018 03:37
URI: http://repository.its.ac.id/id/eprint/42372

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