Azizah, Zahrotul (2018) Decoupling IMC Controller untuk Sistem MIMO (Case Study Pengendalian De-isobutanizer Dual Condenser). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Industri kimia mengolah bahan baku menjadi produk sesuai dengan spesifikasi yang diinginkan. Dalam pelaksanaannya, industri kimia memerlukan tingkat keamanan yang sangat tinggi sehingga membutuhkan pengendalian proses yang lebih baik. Setiap unit operasi perlu kondisi operasi yang berbeda – beda dimana satu unit dengan unit yang lain seringkali saling mempengaruhi atau berinteraksi. Bahkan dalam satu unit proses, antar variabel satu dengan variabel yang lain saling berinteraksi. Interaksi yang terjadi antar variabel inilah yang menjadi penyebab sulitnya mendesain controller MIMO. Terdapat dua pendekatan yang digunakan untuk mengendalikan proses MIMO yaitu menggunakan pengendali multiple Single Input Single Output (SISO) dan menggunakan pengendali multivariable. Multivariable controller sering digunakan untuk mengatasi kelemahan multiple SISO bila ada interaksi dalam sistem tersebut. Interaksi yang sangat kuat menyebabkan multivariable controller menjadi tidak optimum. Oleh karena itu umumnya dilakukan pemilihan pasangan (pairing). Dalam penelitian ini, disamping pemilihan pairing ditambah juga strategi decoupling dan invers decoupling untuk mengurangi interaksi antar proses variabel. Adapun controller yang dipakai adalah MIMO IMC, karena terdapat keuntungan diantaranya menghandle sistem dengan long time delay yang umumnya dijumpai di industri kimia. Penelitian ini dilakukan dengan mensimulasikan kolom de-isobutanizer dual condenser pada kondisi steady state dan dinamik. Adapun pengendali yang digunakan adalah 1DoF IMC tanpa decoupling, decoupling 1DoF IMC, invers decoupling 1DoF IMC, 2DoF IMC tanpa decoupling, decoupling 2DoF IMC, dan invers decoupling 2DoF IMC dengan metode Mp-GM. Dari hasil simulasi menggunakan matlab simulink, invers decoupling 2DoF IMC mampu memberikan peforma yang paling baik (IAE paling kecil) dibandingkan dengan 1DoF IMC tanpa decoupling, decoupling 1DoF IMC, invers decoupling 1DoF IMC, 2DoF IMC tanpa decoupling dan decoupling 2DoF IMC.
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The chemical industry converts raw materials into products according to the desired specifications. In practice, the chemical industry requires a very high-security level and thus requires better process control. Each operating unit needs different operating conditions depending on where one unit with another unit often influences or interact with each other. Even in a processing unit, between one variable and another interact each other. The interaction that occurs between these variables causing the difficulty of designing a Multi Input Multi Output (MIMO) controller. There are two approaches that are used to control the MIMO process, that is using multiple controllers Single Input Single Output (SISO) and using the multivariable controller. The multivariable controller is often used to overcome the disadvantages of multiple SISO when there is interaction within the system. A very strong interaction causes the multivariable controller becomes not optimal. Therefore, it is generally done by mate selection (pairing). In this study, not only select the pairing but also add the strategy of inverted decoupling to reduce interactions between process variables. The controller used is MIMO IMC because there are advantages such as a handle system with a long time delay that is generally found in the chemical industry. This research simulates a dual condenser de-isobutanizer column in steady state and dynamic conditions. The controllers used are 1DoF IMC without decoupling, decoupling 1DoF IMC, inverted decoupling 1DoF IMC, 2DoF IMC without decoupling, decoupling 2DoF IMC, and inverted decoupling 2DoF IMC with Mp-GM tuning method. From simulation result using matlab simulink, inverted decoupling 2DoF IMC is able to obtain the best performance (the smallest IAE) compared to 1DoF IMC without decoupling, decoupling 1DoF IMC, inverted decoupling 1DoF IMC, 2DoF IMC without decoupling and decoupling 2DoF IMC.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RSK 660.281 5 Azi d 3100018078514 |
| Uncontrolled Keywords: | 1DoF IMC, 2DoF IMC, Distilasi Dual condenser, Interaksi, Invers Decoupling, Time delay, 1DoF IMC, 2DoF IMC, Dual condenser distillation, Interaction, Inverted Decoupling, Time delay |
| Subjects: | T Technology > TP Chemical technology > TP156 Crystallization. Extraction (Chemistry). Fermentation. Distillation. Emulsions. T Technology > TS Manufactures > TS155 Production control. Production planning. Production management |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24101-(S2) Master Thesis |
| Depositing User: | Zahrotul Azizah |
| Date Deposited: | 14 Feb 2019 04:43 |
| Last Modified: | 19 Nov 2020 06:07 |
| URI: | http://repository.its.ac.id/id/eprint/53906 |
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