Wahyuningrum, Putri Merlisa (2019) Perancangan Fault Tolerant Control System (FTCS) Akibat Kesalahan Sensor Pada Sistem Pengendalian Tekanan Scrubber di PT. Pertadaya Gas Semarang. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sebagai bagian dari suatu proses pemisahan gas dari cairan, sehingga scrubber merupakan tahapan penting dalam industri gas yang menentukan kualitas suatu produk. Sistem kontrol pada scrubber harus memiliki performansi yang tinggi. Performansi sistem pengendali tidak lepas dari kinerja instrumennya seperti sensor. Kesalahan pada sensor seringkali terjadi, sehingga kontroler akan mengirim sinyal yang salah kepada aktuator. Pada Tugas Akhir ini dilakukan perancangan Fault Tolerant Control (FTC) yang mampu bekerja ketika terdapat kesalahan pada sensor dan dapat mempertahankan performansi sistem. Langkah awal yang dilakukan adalah pemodelan dari scrubber. Selanjutnya perancangan observer menggunakan metode pole placement. Terakhir merekonfigurasi sinyal kontrol. Dilakukan pengujian kesalahan untuk melihat performansi rancangan FTC yaitu kesalahan bias dan kesalahan sensitivitas. Dari hasil simulasi menunjukkan bahwa FTC memiliki performansi jauh lebih baik dalam mengatasi kesalahan dibandingkan dengan kontrol PI. Pada sistem FTC dengan kesalahan sensitivitas 2% didapatkan nilai maximum overshoot 8,477%, settling time 38 detik, dan error steady state 0,023%. Sedangkan sistem tanpa FTC didapatkan nilai maximum overshoot 8,621%, settling time 45 detik, dan error steady state 2,069%.
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As part of a process of separating gas from liquids, the scrubber is an important stage in the gas industry that determines the quality of a product. The control system on the scrubber must have high performance. Control system performance can not be separated from the performance of the instrument such as sensors. Often a sensor error occurs so the controller will send the wrong signal to the actuator. In this Final Project is designed Fault Tolerant Control (FTC) which is able to work when there is a mistake on the sensor and still can keep the system performance. The first step is modeling the scrubber. Next, an observer was designed using the pole placement method. Finally, reconfigure the control signal. Fault test is given to see the performance of the FTC design, namely bias error and sensitivity error. From the simulation results show that FTC has a better performance in dealing with errors compared to PI controls. In the FTC system with a sensitivity error of 2%, the maximum overshoot is 8.477%, the settling time is 38 seconds, and the error steady state is 0.023%. Whereas the system without FTC has the maximum overshoot is 8.621%, the settling time is 45 seconds, and the error steady state is 2.069%.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSF 629.895 Wah p-1 2019 |
| Uncontrolled Keywords: | fault tolerant control, observer, scrubber |
| Subjects: | T Technology > T Technology (General) > T55 Industrial Safety T Technology > T Technology (General) > T57.62 Simulation T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control. T Technology > TJ Mechanical engineering and machinery > TJ223 PID controllers |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Putri Merlisa Wahyuningrum |
| Date Deposited: | 06 May 2024 02:12 |
| Last Modified: | 06 May 2024 02:12 |
| URI: | http://repository.its.ac.id/id/eprint/68372 |
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