Robust washout control for supporting bicycle riding

In this paper, we consider a reduction problem of vibration in riding and rider's burden by stabilizing the bicycle at slow speed. In riding a bicycle, the reference input which is generally required by feedback methods is implicitly determined by a rider. Hence, the preassigned reference input may be biased against the rider's intention. To compensate the bias, we adopt robust washout control which can asymptotically reject the influence of the bias and is robust against the speed fluctuation of the bicycle. Furthermore, by introducing a scaling in designing robust washout control, we improve the resulting control performance.