Fuzzy Controller Design with the Degree of Non-uniformity for the Scaled Active Steering Testbed in the Railway Vehicle

초록

In urban transit systems, rail passenger vehicles are often required to negotiate tight curves. Running curve railway, the wheelsets of conventional vehicles generally misalign radically with the track increasing wheel/rail contact forces and resulting in increased wheel and rail wear, outbreak of squeal noise, fuel consumption, and risk of derailment. To solve these problems, modified suspension system designs, application for alternate wheel profiles, active and semi-active steering techniques have been proposed. Active steering system has proven its ability to bridge the gap between stability and curve friendliness. This paper presents a technique for improving the performance of active steering fuzzy control systems by adequately changing the widths of triangular fuzzy membership functions. Experiment results show that the proposed fuzzy controller robustly yields good performance comparing with conventional controller.