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Implementasi Identifikasi Sistem Kalang Tertutup untuk Asesmen Kinerja Pengendali Level pada Kondensor Hardy F. Logiani; Awang Noor Indra Wardana; Andang Widi Harto
Teknofisika Vol 3, No 1 (2014)
Publisher : Departemen Teknik Nuklir & Teknik Fisika, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1045.497 KB)

Identifikasi sistem kalang tertutup adalah pendekatan eksperimental untuk menentukan model dinamis suatu sistem kalang tertutup. Pada makalah ini, identifikasi kalang tertutup digunakan untuk melakukan asesmen kinerja dari pengendali level pada kondensor. Algoritma yang digunakan adalah algoritma closed-loop output error (CLOE). Hasil dari penelitian ini menunjukan bahwa model sistem kondensor adalah sistem orde dua. Dengan menggunakan model yang didapatkan kemudian dapat dilakukan simulasi untuk mendapatkan analisis tanggapan pada keadaan transient dan keadaan tunak. Simulasi menunjukan sistem pengendalian terpasang mempunyai respon pengendali yang sangat responsif. Respon tersebut pada penelitian ini diperbaiki dengan melakukan penalaan ulang sehingga didapatkan respon pengendali yang lebih sesuai dengan sistem kondensor terpasang.

Development of Fluid Catalytic Cracking Distributed Simulator Based on IEC 61499 Wildan Fatkhurrohman; Awang Noor Indra Wardana; Ester Wijayanti
CHEMICA: Jurnal Teknik Kimia Vol 7, No 1 (2020): Juni 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v7i1.15610

Fluid Catalytic Cracking (FCC) is one of the most important process units in oil refining. Operator skill is one of the determining factors for operational success. The operator cannot train his skills at the plant because it will endanger the ongoing process. Operators' skills can be trained through simulation media. This study developed an FCC model IV process simulator to meet these needs. The application of the IEC 61499 standard uses to create simulation models based on IEC 61499 runtime environments (FORTE). Model validation based on reference simulations. The average percentage of error steady under normal operating conditions is 1.63%. Mean Absolute Percentage Error (MAPE) values for changes in the coking factor, atmospheric temperature and feed temperature are 4.40%, 7.26%, and 6.05%, respectively. Modeling of FCC products on 6 components (gas oil, diesel oil, gasoline, light gas, liquid petroleum gas, and coke) was added as a simulation result. Percent of gas oil conversion between simulation results and plant data has an error of 0.12%. The total fraction value of the components of the simulation results is 1.00 for each operating condition. The simulator interface in the form of a human-machine interface (HMI) was developed using Node-RED. Data communication between FCC simulation models on FORTE and HMI on Node-RED uses the Message Queuing Telemetry Transport (MQTT) communication protocol. Implementation of the IEC 61499 standard allows the simulation model to be distributed across several resources. The distribution of resources is done by simulating the FCC process to be run on several FORTE. The FCC simulation model distributed at 2, 4, and 7 resources can reduce memory usage compared to the 1 centralized resource model by 18.0%, 36.0%, and 48.8%.

Pengaruh Penggunaan Pemancar-penerima pada Controller Area Network R Mochammad Affan Bagus Satria; Awang Noor Indra Wardana; Nazrul Effendy
JURNAL NASIONAL TEKNIK ELEKTRO Vol 9, No 2: July 2020
Publisher : Jurusan Teknik Elektro Universitas Andalas

Controller Area Network (CAN) is a communication network protocol that has been used in various fields as in automotive system to the industrial process. Input/output module as the CAN node in the network can be located nearby or distant from the controller. On the other hand, the CAN network must be designed to reduce the wiring harness significantly with latency as short as possible. CAN protocol can be built with and without the transceiver component. Analysis of the performance of both types of CAN network is conducted to know the exact distance to use transceiver. This research was conducted to analyze the impact of the transceiver on the latency of the CAN system, within the bus length variation. The transceiver and cable length variation were used as the factors of the statistical test that was conducted as the data analysis method in the research. The bus length varies from 50 m, 55 m, 60 m, 65 m, to 70 m. The two-way analysis of variance test and Tukey contrast test were used with a significance level of 0.05. There are three results of the two-way analysis of variance test, showing that significant differences have occurred on the effect of the transceiver, the bus length variation, and interaction between them, giving a p-value of 0.0003, 0.0008, and 0.0034 respectively. The results of the Tukey contrast test have shown that the latency of CAN systems without transceiver does not differ significantly on less than 65 m cable length. The analysis has concluded that the CAN system can well function without transceiver which is the cable length is less than 65 m.Keywords : CAN, communication protocol, cable length variation, latency AbstrakController Area Network (CAN) merupakan suatu protokol jaringan komunikasi yang telah digunakan pada berbagai bidang seperti sistem kendaran bermotor sampai sistem industri proses. Modul masukan/keluaran sebagai node dalam jaringan CAN dapat terletak berdekatan dengan pengendali atau jauh dari pengendali. Di sisi lain, jaringan CAN harus memiliki sistem pengkabelan yang sederhana dan waktu latensi yang singkat. Jaringan komunikasi CAN dapat dibangun dengan menggunakan pemancar-penerima dan tanpa pemancar-penerima. Analisis performa dari kedua jaringan tersebut dilakukan untuk mengetahui pada panjang kabel berapa komponen pemancar-penerima dibutuhkan. Dalam penelitian ini, dilakukan analisis dari pengaruh komponen pemancar-penerima terhadap parameter latensi, dalam panjang kabel yang bervariasi. Terdapat dua faktor dalam melakukan analisis data, yaitu faktor komponen pemancar-penerima dan faktor variasi panjang kabel pada 50 m, 55 m, 60 m, 65 m, dan 70 m. Metode yang diimplementasikan dalam melakukan analisis data adalah uji analisis variasi dua jalur dan uji kontras Tukey, dengan tingkat signifikansi sebesar 0,05. Uji analisis variasi dua jalur memberikan tiga hasil nilai-p dari pengaruh pemancar-penerima, pengaruh variasi panjang kabel, serta interaksi dari keduanya, yaitu berturut-turut sebesar 0,0003, 0,0008, dan 0,0034. Hasil tersebut lebih kecil dari tingkat signifikansi yang digunakan, sehingga dapat ditarik kesimpulan bahwa komponen pemancar-penerima serta variasi panjang kabel mempengaruhi nilai latensi sistem secara signifikan. Hasil uji Tukey juga menunjukan bahwa selama panjang kabel kurang dari 65 m, latensi dari jaringan CAN tanpa pemancar-penerima tidak berbeda secara signifikan. Hasil analisis tersebut menunjukan bahwa bahwa jaringan CAN tanpa pemancar-penerima dapat digunakan dengan baik selama panjang kabel kurang dari 65 m.Kata kunci : CAN, protokol komunikasi, variasi panjang kabel, latensi

Pengembangan Electronic Load Controller untuk Self-Excited Induction Generator Berbasis Penyearah Tiga Fase Menggunakan Raspberry Pi Ihsan Nur Hakim; Aan Listanto Amdrian; Adlan Bagus Pradana; Awang Noor Indra Wardana
JURNAL NASIONAL TEKNIK ELEKTRO Vol 9, No 3: November 2020
Publisher : Jurusan Teknik Elektro Universitas Andalas

A self-excited induction generator (SEIG) could provide electricity for isolated areas appropriately. An electronic load controller (ELC) with Raspberry Pi is designed to overcome the voltage and frequency changing of SEIG caused by load changing, while ab le to support distributed system trend with Framework for Distributed Industrial Automation and Control (4DIAC). The ELC design is based on the characteristics of SEIG and Indonesian electricity system standards. The design is then implemented, and the characteristics are identiﬁed. The output of SEIG is regulated at frequency of 50 Hz and terminal voltage of 294 V. A voltage sensor is designed with a transformer, ﬁlters, rectiﬁer, and ADC. The actuator consisted of a three-phase rectiﬁer, dump load, optocoupler driver, and IGBT. A PI-controller based on Python is applied in Raspberry Pi Zero with experimentally tuned Kp and Ki values both of 5.0. The output changing of SEIG caused by load changing could be regulated within the Indonesian electricity frequency standard in its steady state. The maximum voltage deviation from the nominal value is -12.24%, while the maximum frequency deviation is +3.2%, and the longest settling time is 832 ms.Keywords : induction generator, electronic load controller and Raspberry Pi.

Online Tuning Diagnosis of Proportional Integral Derivative Controller based on IEC 61499 Function Blocks Florentina Vela Nindyasari; Awang Noor Indra Wardana; Agus Arif
JURNAL NASIONAL TEKNIK ELEKTRO Vol 10, No 3: November 2021
Publisher : Jurusan Teknik Elektro Universitas Andalas

Controller performance is a crucial aspect of industrial processes; hence, it is critical to maintaining optimal controller performance conditions. Bad controller performance can be caused by poor proportional integral derivative (PID) controller tuning those results in aggressive and sluggish controllers’ behavior. Correct diagnosis of poor controller tuning becomes vital so that it can adequately handle the controller. This study designs several function blocks for online diagnosis of poor PID controller tuning based on the IEC 61499 standard. The design of the function blocks began with design the method used for diagnosing a poor controller tuning. The procedure was based on autocorrelation function (ACF), comparison of signal to noise ratio (SNR) estimation, and idle index. The function blocks were validated with first order plus delay time (FOPDT) processes, which had aggressive, sluggish, or well-tuned behavior. The function blocks were implemented on a Fluid Catalytic Cracking (FCC) plant and industrial data with various process faults to evaluate its capability to diagnose a poor controller tuning. The developed function block can precisely analyze a poor controller tuning on FCC plant and 8 of 10 industrial data. It showed that the function blocks could diagnose a poor controller tuning correctly if the oscillation were regular.

Komparasi Metode Deteksi Friksi Statis Katup Berbasis Pencocokan Grafis Daniel Kristanto; Awang N.I. Wardana; Widya Rosita
Jurnal Otomasi Kontrol dan Instrumentasi Vol 8 No 2 (2016): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2016.8.2.4

Akhir-akhir ini, performansi yang buruk pada sistem kontrol menjadi isu yang penting dalam industri. Performansi yang buruk pada sistem kontrol akan memberikan dampak negatif pada proses produksi sebuah industri, seperti menurunnya kuantitas ataupun kualitas hasil industri. Masalah utama dari sistem kontrol adalah ketidaklinieran yang disebabkan oleh adanya friksi statis pada katup. Penelitian mengenai friksi statis sudah banyak dilakukan. Metode-metode yang pernah diperkenalkan menggunakan beberapa teknik yang berbeda-beda, seperti pencocokan grafis, pengolahan sinyal, dan perhitungan statistik. Dalam makalah ini dibandingkan dua metode yang menggunakan teknik pencocokan grafis, yaitu pencocokan kurva yang dirumuskan oleh He dan pencocokan elips yang dirumuskan oleh Choudhury. Perbandingan dilakukan dengan 2 jenis input, yaitu data simulasi dan implementasi pada data industri. Hasil dari penelitian ini menunjukkan bahwa metode pencocokan elips lebih baik dalam mendeteksi friksi statis dibandingkan dengan pencocokan kurva menggunakan data simulasi, tetapi kedua metode memberikan hasil yang hampir sama pada implementasi data industri. Kelebihan lain dari metode pencocokan elips adalah dapat mengkuantifikasi besarnya friksi statis yang terjadi.

Komparasi Pemodelan dan Identifikasi Sistem pada Dinamika Temperatur Gas Buang Ruang Bakar pada Circulated Fluidized Bed Boiler Muhammad N. Anis; Awang N. I. Wardana; Ester Wijayanti
Jurnal Otomasi Kontrol dan Instrumentasi Vol 8 No 2 (2016): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2016.8.2.5

Seringkali fokus pembangkitan listrik di PLTU adalah pada kondisi uap (T & P), jumlah produksi uap (ton/h) dan beban daya (100%) namun efisiensi pembakaran jarang diperhatikan sehingga menyebabkan kerusakan mesin. Indikator efisiensi pembakaran batu bara adalah dinamika temperatur gas buang ruang bakar. Untuk mendapatkan sistem instrumentasi-kendali yang handal dan efisien dibutuhkan pemahaman mendalam terhadap sistem. Langkah untuk meningkatkan pemahaman dapat dengan cara membentuk dan memahami model matematis sistem.Penelitian ini bertujuan mendapatkan model matematis dari fenomena dinamika temperatur gas buang ruang bakar. Pemodelan dilakukan dengan membandingkan metode matematis dan identifikasi sistem. Pemodelan matematis dilakukan dengan menggunakan neraca massa dan neraca energi, sedangkan identifikasi sistem dilakukan dengan menggunakan struktur model multiple-input-single-output ARMAX sebagai pendekatan sistem linier. Setelah model didapatkan, model divalidasi dengan data lapangan pada kondisi operasi. Hasil validasi model berupa prediksi dinamika temperatur gas buang ruang bakar dari masing-masing metode dibandingkan kualitasnya (fit & MSE). Dengan menganalisis hasil didapatkan bahwa model hasil pemodelan matematis menghasilkan nilai kesesuaian kurva sebesar 86,4218% dan nilai galat kuadrat rerata sebesar 0,1632 oC dan model hasil identifikasi sistem menghasilkan nilai kesesuaian kurva sebesar 86,8596% dan nilai galat kuadrat rerata sebesar 0,1529 oC.

Intermittent Oscillation Diagnosis in a Control Loop Using Extreme Gradient Boosting Dana Fatadilla Rabba; Awang Noor Indra Wardana; Nazrul Effendy
JURNAL NASIONAL TEKNIK ELEKTRO Vol 11, No 3: November 2022
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v11n3.1040.2022

The control loop in the industry is a component that must be maintained because it will determine the plant's performance. Most industrial controllers experience oscillations with various causes, such as noise, oscillation, backlash, dead band, hysteresis, random variation, and poor controller tuning. The oscillation diagnosis system, which can understand the oscillation type characteristics, is built based on machine learning because it is dynamic and not based on specific rules. This study developed an online oscillation diagnosis program using the extreme gradient boosting (XGBoost) method. The data was obtained through the simulation of the Tennessee Eastman process. The data is segmented on specific window sizes, and then time series feature extraction is performed. The extraction results are then used to build an XGBoost model capable of performing oscillation diagnosis tasks. There are seven types of oscillations tested in this study. The model that has been made is implemented online with the help of sliding windows. The results show that the XGBoost model performs best when the data window size is 100, with the accuracy performance and the F1 score of the model in classifying the type of oscillation being 0.918 and 0.905, respectively. The model can detect the type of oscillation with an average diagnosis time of 712 seconds on diagnostic tests.

Perancangan Struktur Kontrol Penggilingan Batubara pada Sistem Pembakaran Batubara Stefanus Yudi Irwan; Awang Noor Indra Wardana; Ester Wijayanti
Jurnal Rekayasa Elektrika Vol 15, No 3 (2019)
Publisher : Universitas Syiah Kuala

The inability of the coal mill control structure to monitor and control pulverized coal ﬂow causes operational and environmental problems. The research was done to design the new control structure for coal mill in coal firing system to achieve an improvement on control system performance compared to the existing control structure. Cascade control, blend station, and feedback control was used to control the ﬂow of coal, the ﬂow of primary air, and temperature of the pulverized coal. The result of the evaluation shows that the new control structure capable of fulfilling all the control objectives applied to it. Implementation of the new control structure capable to make the step response of the coal mill to have an average settling time at 161.75 seconds with 0% overshoot. The new control structure also capable to make the pulverized coal fineness at the range of 70% to 75% and moisture content at the range of 2.18% to 2.28%. The result of the evaluation makes the control performance of the new control structure is better than the previous coal mill control structure.

Perancangan Struktur Kontrol Penggilingan Batubara pada Sistem Pembakaran Batubara Stefanus Yudi Irwan; Awang Noor Indra Wardana; Ester Wijayanti
Jurnal Rekayasa Elektrika Vol 15, No 3 (2019)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v15i3.14605

The inability of the coal mill control structure to monitor and control pulverized coal ﬂow causes operational and environmental problems. The research was done to design the new control structure for coal mill in coal firing system to achieve an improvement on control system performance compared to the existing control structure. Cascade control, blend station, and feedback control was used to control the ﬂow of coal, the ﬂow of primary air, and temperature of the pulverized coal. The result of the evaluation shows that the new control structure capable of fulfilling all the control objectives applied to it. Implementation of the new control structure capable to make the step response of the coal mill to have an average settling time at 161.75 seconds with 0% overshoot. The new control structure also capable to make the pulverized coal fineness at the range of 70% to 75% and moisture content at the range of 2.18% to 2.28%. The result of the evaluation makes the control performance of the new control structure is better than the previous coal mill control structure.

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