Al Barqa, Mahardhika Yodha Putra (2026) Analisis Data Telemetri Lomba Shell Eco-Marathon Untuk Identifikasi Parameter Dinamika Mobil Sapuangin Dan Formulasi Hambatan Pada Tikungan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kendaraan Shell Eco-Marathon kategori Urban Concept memerlukan parameter kendaraan yang representatif agar performanya dapat dievaluasi berdasarkan kondisi operasi aktual, bukan hanya berdasarkan spesifikasi komponen atau asumsi. Penelitian ini telah mengolah data telemetri kendaraan Sapuangin pada Shell Eco-Marathon Asia 2024 di Pertamina Mandalika International Circuit untuk mengidentifikasi parameter dinamika longitudinal serta karakteristik geometri dan respons dinamika kendaraan pada tikungan. Variabel yang dianalisis meliputi waktu, kecepatan GPS, arus JM3, koordinat posisi, percepatan longitudinal, kelengkungan, radius, percepatan lateral, gaya traksi, putaran, torsi, daya, dan energi. Data telah diperiksa, dibersihkan, disaring, disinkronkan, dikonversi ke satuan SI, kemudian dikelompokkan menjadi fase gliding, tikungan, dan akselerasi. Kondisi mesin telah diidentifikasi menggunakan arus JM3, sedangkan 45 segmen coast-down telah digunakan untuk menentukan C_{rr} dan C_{d}A serta mengevaluasi sensitivitas pengaruh angin. Hasil analisis menunjukkan 14–15 penyalaan mesin per lap dengan engine-on duty cycle sebesar 11,2–12,7%. Gaya traksi maksimum diperkirakan sebesar 176 N, torsi maksimum 2,75 N·m pada 5.942 rpm, dan daya maksimum 1,79 kW pada 6.621 rpm. Regresi coast-down menghasilkan C_{rr} sebesar 0,00854, sedangkan nilai representatif sebesar 0,00600 digunakan setelah mempertimbangkan pengaruh kondisi lintasan dan angin; C_{d}A diperoleh sebesar 0,120 m². Pengolahan GPS mengidentifikasi sembilan zona kelengkungan signifikan per lap dengan radius rata-rata 61–69 m, panjang total 367–384 m, percepatan lateral rata-rata 1,15–1,30 m/s², dan nilai maksimum 5,60–6,27 m/s². Penerapan formulasi hambatan gelinding efektif dengan koefisien tikungan acuan sebesar 2 menghasilkan tambahan energi akibat tikungan sebesar 343–345 J per lap atau 0,48–0,50% dari energi road load. Hasil tersebut menunjukkan bahwa pengaruh tikungan merupakan tambahan kecil pada hambatan gelinding efektif, sedangkan hambatan gelinding dasar dan aerodinamika tetap menjadi komponen utama kebutuhan energi kendaraan.
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Shell Eco-Marathon Urban Concept vehicles required representative parameters to evaluate performance under actual operating conditions rather than solely from component specifications or assumptions. This study processed telemetry data from the Sapuangin vehicle during Shell Eco-Marathon Asia 2024 at the Pertamina Mandalika International Circuit to identify longitudinal dynamic parameters and vehicle geometry and cornering dynamics. The analyzed variables included time, GPS speed, JM3 current, position, longitudinal acceleration, curvature, radius, lateral acceleration, tractive force, engine speed, torque, power, and energy. The data were inspected, cleaned, filtered, synchronized, converted into SI units, and grouped into gliding, cornering, and acceleration phases. Engine operating conditions were identified from JM3 current, while 45 coast-down segments were used to determine C_{rr} and C_{d}A and evaluate wind sensitivity. The results showed 14–15 engine starts per lap with an engine-on duty cycle of 11.2–12.7%. The maximum tractive force was estimated at 176 N, the maximum torque was 2.75 N·m at 5,942 rpm, and the maximum power was 1.79 kW at 6,621 rpm. Coast-down regression produced a C_{rr} value of 0.00854, whereas a representative value of 0.00600 was adopted after track and wind effects were considered; C_{d}A was identified as 0.120 m². GPS processing identified nine significant curvature zones per lap, with average radii of 61–69 m, total lengths of 367–384 m, average lateral accelerations of 1.15–1.30 m/s², and maximum values of 5.60–6.27 m/s². Applying the effective rolling-resistance formulation using a reference cornering coefficient of 2 produced additional cornering-related rolling-resistance energy of 343–345 J per lap, equivalent to 0.48–0.50% of road-load energy. Cornering made only a small contribution to effective rolling resistance, while basic rolling resistance and aerodynamic drag remained the main components of vehicle energy demand.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Aerodynamics, Aerodinamika, Coast-Down, Coast-Down, Cornering, Energi, Energy, Telemetri, Telemetry, Tikungan. |
| Subjects: | T Technology > T Technology (General) > T57.5 Data Processing T Technology > TJ Mechanical engineering and machinery T Technology > TL Motor vehicles. Aeronautics. Astronautics T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL152.5 Motor vehicles Driving T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL270 Automobiles--Wheels--Alignment. T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521 Aerodynamics, Hypersonic. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering |
| Depositing User: | Mahardhika Yodha Putra Al Barqa |
| Date Deposited: | 04 Aug 2026 07:14 |
| Last Modified: | 04 Aug 2026 07:14 |
| URI: | http://repository.its.ac.id/id/eprint/143576 |
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