A barrier Lyapunov function (BLF) based approach for antiskid traction/braking control of high speed trains

Antiskid is an important factor that directly impacts safe operation of high-speed trains (HST). However, if the antiskid control is designed independently from the traction/braking unit, as usually the case in most existing methods, the traction/braking control performance might be degraded. In this work, the antiskid constraint is directly linked with the development of traction/braking control system, which of course renders the underlying problem rather complicated. A barrier Lyapunov function (BLF) based approach is utilized to solve this problem, resulting in a control scheme capable of ensuring stable traction/braking operation and at the same time preventing possible wheel skid and improving the performance of the traction/braking system. Both theoretical analysis and numerical simulation validate the effectiveness of the proposed control.