Control of pantograph-catenary contact load with parameter uncertainties based on fuzzy backstepping

Pantograph-catenary system has complex coupling property of electric and machinery. Improving the current collection performance of the pantograph-catenary is a critical issue for the present high speed train system. The pantograph active control is an important mean to stabilize the contact load and improve the current collection for the pantograph-catenary. From the control theory point of view, this paper proposes a backstepping precise control method for pantograph-catennary contact load based on fuzzy system, considered the influence of wind load and parameters uncertainty. Specifically, virtual control laws are utilized to select appropriate Lyapunov function with step-by-step backstepping approach. And the fuzzy interfere systems are designed to approximate the uncertainty and differential of virtual control laws, in which the relevant stability analysis is provided. Simulation and experimental results show that the proposed method can decrease the effects of uncertainty, and greatly restrain the contact load fluctuations of pantograph-catenary, and improve the current collection performance. © 2017, Science Press. All right reserved.