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.
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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 > 30201-(S1) Undergraduate Thesis |
| Depositing User: | 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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