Reducing rider effort for electric bicycles by environment disturbance compensation

Saïd Mammar (1) , Naïma Aït Oufroukh (1) , Sébastien Glaser (2)

1 IBISC - Informatique, Biologie Intégrative et Systèmes Complexes
2 IFSTTAR/LIVIC - Laboratoire sur les Interactions Véhicules-Infrastructure-Conducteurs

While newly installed infrastructure in several European cities for bicycles rental offer a real alternative for mobility, road relief variation is still a limiting factor for the generalization of their use by all people. Electric bicycles (EBs) are already commercially available but the power assistance strategy is generally unsuitable and is just proportional to the rider effort and does not compensate ground slope. In this paper, an unknown input proportional two integrals observer is designed in order to robustly estimate the environmental disturbance constituted by the gravitational force and frictional force. The proposed estimation approach is shown to be effective through tests on real road slope profile. The estimations is finally used to compensate the disturbance via the electric motor.

Domains: Engineering Sciences [physics]; Automatic

Saïd Mammar, Naïma Aït Oufroukh, Sébastien Glaser. Reducing rider effort for electric bicycles by environment disturbance compensation. IEEE International Conference on Control Applications (CCA 2011), Sep 2011, Denver, CO, United States. pp.550--555, ⟨10.1109/CCA.2011.6044379⟩. ⟨hal-00668296⟩