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All Journal Heuristic EMITTER International Journal of Engineering Technology Aiti: Jurnal Teknologi Informasi Jurnal Mekanik Terapan Jurnal Taguchi : Jurnal Ilmiah Teknik dan Manajemen Industri Jurnal Pengabdian Masyarakat dan aplikasi Teknologi The Indonesian Journal of Computer Science
Zainal Arief
Fakultas Teknik Untag Surabaya
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Characterization and Modeling of Pedal Torque in a Regenerative Bicycle Trainer Using Current Control Prayoga, Adi; Mauludi, Fajar; Sabilul Huda, Muhammad Ravi; Putri Herwandi, Kasih Aisyah; Darmawan, Adytia; Satriyanto, Edi; Arief, Zainal
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8357

Abstract

Regenerative bicycle trainers support more sustainable indoor cycling by converting a rider’s kinetic energy into electrical energy while producing a controllable resistive load. For a realistic riding feel, the relationship between commanded braking current and pedal torque must be accurately defined. This study develops and validates an empirical current-torque model for a trainer based on a brushless direct current (BLDC) motor using a second-order polynomial. Experiments were conducted on two sprocket configurations (32-tooth and 12-tooth), with 11 braking current setpoints ranging from 0 to 10 A under steady-state conditions. The model was evaluated through its inverse form using five torque setpoints for each configuration. Results show strong agreement with experimental data, with coefficients of determination ( ) exceeding 0.998. The 12T configuration achieves higher accuracy, with a Mean Percentage Error of 1.55%, compared to 9.20% for the 32T configuration. This is likely due to improved torque transmission and more stable friction drive behaviour at higher loads. Negative quadratic coefficients indicate mild nonlinearities consistent with magnetic saturation. The model is suitable for feedforward control, enabling realistic torque simulation without requiring expensive external torque sensors.
Co-Authors ., Justiawan ., Justiawan Achmad Alfian Hidayat, Achmad Adi Prayoga Daffa Syah Alam Darmawan, Adytia Dedid Cahya Happyanto Dian Mursyitah Edi Satriyanto Erma Yuliaty, Erma Harijanto, Setijanen Djoko Herlina Herlina I Nyoman Lokajaya, I Nyoman Indra Adji Sulistijono Istantyo Yuwono, Istantyo Jufrizel , Jufrizel Lucky Pradigta Setiya Raharja Mauludi, Fajar Mochamad Mobed Bachtiar, Mochamad Mobed Novie Ayub Windarko Putri Herwandi, Kasih Aisyah Q., Ony Asrarul Q., Ony Asrarul Ridhoi, Ahmad Riyanto Sigit, Riyanto Rokhana, Rika Sabilul Huda, Muhammad Ravi Singgih, Mochammad Siswoyo, Agus Siswoyo, Agus Siti Muhimatul Khoiroh Siti Mundari Zamroni, Moh Shiddiq Zarory, Hilman