Perancangan Active Fault Tolerant Control (AFTC) pada Plant Evaporator Efek Vakum pada PT. Polychem Indonesia Tbk dengan Kesalahan Aktuator dan Sensor

Amarto, Febrianto Bimo (2017) Perancangan Active Fault Tolerant Control (AFTC) pada Plant Evaporator Efek Vakum pada PT. Polychem Indonesia Tbk dengan Kesalahan Aktuator dan Sensor. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sebagai bagian akhir dari unit Evaporator Multi Efek (EME), Operasi Evaporator Efek Vakum (EEV) sangat menentukan kualitas produk dan efisiensi dari pabrik petrokimia khusunya pada di PT. Polychem Indonesia Tbk. Sistem kontrol yang bekerja pada EEV harus memiliki performansi dan kehandalan yang tinggi. EEV di modelkan secara numerik dengan menggunakan pendekatan kesetimbangan massa dan energi. Skema Active Fault Tolerant Control (AFTC) di terapkan pada EEV agar mampu mengakomodasi kesalahan sensor dan aktuator secara simultan. AFTC terdiri dari deteksi dan diagnosis dengan mengguankan sebuah observer dan mekanisme rekonfigurasi sinyal kontrol dengan teknik kompensasi. Dua pasang variabel pengukuran dipakai yaitu level-temperatur dan level-laju aliran guna merancang observer. Hasil simulasi menunjukan bahwa kontrol PI untuk variabel level-laju aliran dengan menggunakan AFTC mampu mengkompensasi kesalahan sensor dan aktuator secara simultan dengan performa kontrol Maximum Overshoot, Maximum Undershoot, Error Steady State,Settling Time dan Integral Absolute Error (IAE) masing-masing sebesar 1.07%, 6.607%, 0%, 1750s dan 19.88 ========================================================= As the final part of the Multi Effect Evaporator (MEE) unit, Vacuum Effect Evaporator (VEE) operation will determine product quality and efficiency of the petrochemical plant notably in PT. Polychem Indonesia Tbk. Control systems that work on VEE require high performance and reliability.VEE modeled numerically by using mass and energy equibrilium approach. Active Fault Tolerant Control (AFTC) scheme is applied to VEE in order to accommodate both sensor and actuator faults simultaneously. AFTC consist of detection and diagnosis by using an observer and control signal reconfiguration mechanism with compensation technique. Two pairs of measurement variable are used i.e level-temperature and level-flowrate to design the observer. Simulation results show PI control combined by AFTC using level-flowrate variable is able to compensate sensor and actuator faults simultaneously with control perfomances result shown by Maximum Overshoot is 1.07%, Maximum Undershoo 6.607%t, Steady State Error is 0%, Settling Time is1750s and Integral absolute error (IAE) is 19.88

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Evaporator Efek Vakum (EEV), Kesalahan Sensor dan Aktuator, Active Fault Tolerant Control (AFTC), Vacuum Effect Evaporator (VEE), Sensor and Actuator Fault
Subjects: T Technology > T Technology (General) > T55 Industrial Safety
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Febrianto Bimo Amarto
Date Deposited: 12 Oct 2017 03:11
Last Modified: 08 Mar 2019 03:06
URI: https://repository.its.ac.id/id/eprint/44706

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