Design and verification of a parallel elastic robotic leg

TANFENER E., KARAGÖZ O. K., CANDAN S. Ş., TURGUT A. E., YAZICIOĞLU Y., ANKARALI M. M., ...Daha Fazla

Bioinspiration and Biomimetics, cilt.19, sa.2, 2024 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 2
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1088/1748-3190/ad2375
  • Dergi Adı: Bioinspiration and Biomimetics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Compendex, EMBASE, INSPEC, MEDLINE
  • Anahtar Kelimeler: legged locomotion, parallel elastic actuation, spring-loaded inverted pendulum, system identification
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This paper presents the design and experimental verification of a parallel elastic robotic leg mechanism that aims to capture the dynamics of the linear mass-spring-damper model. The mechanism utilizes a wrapping cam mechanism to linearize the non-linear force resulting from the elongation of the parallel elastic element. Firstly, we explain the desired dynamics of the mass-spring-damper model, including the impact transitions, and the design of the wrapping cam mechanism. We then introduce a system identification procedure to estimate the parameters of the leg mechanism corresponding to the dynamic model. The estimated parameters are tested with a cross-validation approach to evaluate the mechanism’s performance in tracking the desired model. The experimental results show that the passive dynamics of the mechanism resemble the linear model as intended. Thus, the robot provides a basis for using parallel elastic actuation while using model-based controllers that benefit the analytic solutions of the linear model.