Method to Improve Adaptation Speed of Control Parameters for Active Control Pantographs

摘要

In order to improve current collection performance as train running speeds increase, the authors have been working on the development of a feed-forward control technique for reducing contact force fluctuation, based on information about support spans and train running speed. The idea of the approach is to control the magnitude and phase lag in force control acting on the pantograph frame, allowing the force control to work after the controller has found the optimal magnitude and phase lag. The problem of this approach, however, is that finding the two optimal parameters using the steepest descent method is time consuming. This study proposes an improved approach in terms of parameter adaptation speed. An experimental result shows that the adaptation speed of the proposed method is about 20 times greater than that of the conventional one.