Arwani, Muhammad (2016) Pengukuran Sifat Biolistrik Secara Lateral Untuk Pendugaan Rendemen Sementara Tebu Menggunakan Artificial Neural Network (ANN). Sarjana thesis, Universitas Brawijaya.
Abstract
Teknik pengukuran rendemen tebu yang mudah, cepat, dan akurat sangat diperlukan pada industri gula. Pengukuran rendemen tebu yang praktis diduga dapat memanfaatkan sifat biolistrik. Sifat biolistrik menggambarkan kemampuan suatu bahan untuk menyimpan, mentransmisikan, dan memantulkan gelombang elektromagnetik. Sifat listrik bahan tergantung pada bentuk, struktur, dan kondisi internal bahan. Sifat biolistrik tebu dapat diukur menggunakan metode parallel plate. Pengukuran sifat biolistrik tebu telah dilakukan pada permukaan longitudinal, tetapi perlu preparasi sampel dengan presisi yang tepat karena dilakukan pemotongan batang tebu sepanjang 2 cm. Diduga pengukuran secara lateral akurasi pendugaan tidak berbeda jauh. Perbedaan nilai sifat biolistrik pada tiap bahan dapat dijadikan indikator perbedaan komposisi bahan. Nilai sifat biolistrik digunakan untuk pendugaan rendemen tebu dengan metode artificial neural network (ANN). Algoritma backpropagation digunakan untuk menghubungkan input sifat biolistrik dan output hasil prediksi rendemen sementara tebu. Hasil penelitian menunjukkan tebu cenderung bersifat kapasitif, bahkan resistif. Tebu ruas bawah memiliki rendemen sementara tertinggi dibanding ruas tengah dan atas. Metode pengukuran secara lateral dapat mempercepat proses prediksi, karena dapat dilakukan tanpa harus memotong tebu secara presisi dengan error tidak jauh berbeda dari pengukuran longitudinal. Hasil trial error pembagian data pelatihan dan validasi terbaik adalah 66,67%-33,33%. Selain itu, fungsi pembelajaran dan fungsi aktivasi terbaik menunjukkan nilai mean square error (MSE) validasi terendah yaitu trainlm dengan fungsi aktivasi logsig pada hidden layer dan purelin pada output viii layer. Analisis sensitivitas ANN dengan input sifat biolistrik (kapasitansi, dan resistansi) dan output rendemen sementara tebu didapat topologi terbaik yaitu 2-30-40-1 (2 node input, 30 node hidden layer 1, 40 node hidden layer 2, 1 node output). Pada topologi terbaik didapat nilai MSE pelatihan 0,00000347 dan validasi 0,04 serta koefisien korelasi pelatihan dan validasi sebesar 0,999 dan 0,9175.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FTP/2016/484/051610091 |
| Subjects: | 300 Social sciences > 338 Production > 338.1 Agriculture |
| Divisions: | Fakultas Teknologi Pertanian > Teknologi Industri Pertanian |
| Depositing User: | Nur Cholis |
| Date Deposited: | 18 Oct 2016 09:09 |
| Last Modified: | 24 Oct 2021 22:30 |
| URI: | http://repository.ub.ac.id/id/eprint/151054 |
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