PI-Like Fuzzy Logic Controller Untuk Pengaturan Tegangan DC Pada Sistem Plasma Candle

Palullungan, Harryson (2026) PI-Like Fuzzy Logic Controller Untuk Pengaturan Tegangan DC Pada Sistem Plasma Candle. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini merancang dan mengimplementasikan PI-like Fuzzy Logic Controller (FLC) untuk pengaturan tegangan DC pada sistem plasma candle berbasis High Frequency Solid State Tesla Coil (HFSSTC) yang bersifat nonlinier dan impedansi tidak konstan. Perancangan FLC mengadopsi 49 aturan fuzzy dari Cheng et al. (2010) dengan fungsi keanggotaan segitiga dan faktor skala GE=0,04, GDE=0,2, serta GU=0,02. Implementasi dilakukan pada ESP32 dengan periode sampling 100 ms. Karakterisasi open-loop awal menunjukkan tegangan keluaran bervariasi antara 47,58 V hingga 51,20 V dengan daya 24,10 W hingga 101,98 W, serta nyala plasma stabil pada duty cycle 80% ke atas dengan fluktuasi resonansi standar deviasi hingga 4,35 V. Pengujian performa controller dilakukan dalam dua skenario pada plant nyata. Skenario A menguji kemampuan kompensasi terhadap variasi tegangan input (35→40→45 V) dengan setpoint tetap 50 V. Hasil menunjukkan Steady-state error <0,07 V, overshoot 0,28%, dan settling time praktis 0 ms. Duty cycle beradaptasi dari rata-rata 68,4% menjadi 63,3%. Skenario B menguji kemampuan tracking terhadap perubahan setpoint (50→45→50 V). Hasil menunjukkan fall time 4,60 s, rise time 5,80 s, error Steady-state -0,07 V dan 0,09 V, dengan duty cycle beradaptasi dari 64,5% menjadi 53,9%. Secara kuantitatif, PI-like FLC berhasil menekan fluktuasi tegangan hingga 81,1% dan meningkatkan akurasi kendali sebesar 93,1% dibandingkan tanpa kendali. Kualitas nyala plasma meningkat dengan intensitas lebih stabil (standar deviasi 62,96 Lux), efisiensi energi 24,99 Lux/W, konsumsi daya turun 30,2%, dan frekuensi padam 0 kali/60 detik. Dengan demikian, PI-like FLC terbukti efektif menjaga stabilitas tegangan DC dan meningkatkan kualitas nyala plasma pada sistem plasma candle.
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This study Designs and implements a PI-like Fuzzy Logic Controller (FLC) for DC voltage regulation in a nonlinear HFSSTC-based plasma candle system with variable impedance. The FLC Design adopts 49 fuzzy rules from Cheng et al. (2010) with triangular membership functions and scaling factors GE=0.04, GDE=0.2, and GU=0.02. Implementation is carried out on ESP32 with 100 ms sampling period. Initial open-loop characterization shows output voltage varies between 47.58 V to 51.20 V with power from 24.10 W to 101.98 W, with plasma stabilizing at duty cycles above 80% having resonance fluctuation standard deviation up to 4.35 V. Controller performance testing was conducted in two scenarios on a real plant. Scenario A tested compensation capability against input voltage variation (35→40→45 V) at fixed 50 V setpoint. Results show Steady-state error <0.07 V, overshoot 0.28%, and practically 0 ms settling time. Duty cycle adapted from 68.4% to 63.3%. Scenario B tested tracking capability against setpoint changes (50→45→50 V). Results show fall time 4.60 s, rise time 5.80 s, Steady-state errors of -0.07 V and 0.09 V, with duty cycle adapting from 64.5% to 53.9%. Quantitatively, the PI-like FLC successfully suppresses voltage fluctuation by 81.1% and improves control accuracy by 93.1% compared to uncontrolled conditions. Plasma quality improves with more stable intensity (standard deviation 62.96 Lux), energy efficiency 24.99 Lux/W, power consumption reduced by 30.2%, and extinction frequency 0 times/60 seconds. Thus, the PI-like FLC proves effective in maintaining DC voltage stability and improving plasma quality in the plasma candle system.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	PI-like Fuzzy Logic Controller, HFSSTC, plasma candle, DC voltage, nonlinear control system, plasma stove PI-like Fuzzy Logic Controller, HFSSTC, plasma candle, tegangan DC, sistem kendali nonlinier, kompor plasma
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3070 Automatic control
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Harryson Palullungan
Date Deposited:	27 Jul 2026 01:27
Last Modified:	27 Jul 2026 01:27
URI:	http://repository.its.ac.id/id/eprint/137720

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