基于状态空间法的受电弓主动控制的研究

Study on Pantograph Active Control Based on State Space Method

建立线性化的受电弓模型和接触网的有限元模型、以及它们的耦合系统动力学模型,分析接触网的刚度变化,利用最优控制理论对主动控制式受电弓进行了理论上的研究。根据高速铁路对受电弓和接触网动力学性能的要求,从降低接触压力的波动以改善受流质量着手,针对弓网关系的特点,建立了受电弓主动控制系统模型,采用全状态反馈设计并利用线性二次型最优控制策略设计了受电弓主动控制的控制器,并求得了控制器参数。对控制系统进行仿真验证和研究。结果表明,采用主动控制式受电弓,能够降低接触压力的波动,提高弓网系统的动态性能,改善受流质量。

The pantograph linear model, catenary finite element model, and the pantograph and catenary coupled dynamic model are set up. The characteristic of catenary contact stiffness is analyzed. By using optimization theory, the pantograph active control is studied theoretically. According to the requirement of the high-speed railway for the pantograph and catenary dynamic performance and the characteristics of the pantograph-catenary system, the model of the active control pantograph system is set up from the viewpoint of decreasing the contact force fluctuation and improving the current collection quality. The active control strategy is designed and the control parameters are obtained by using the linear quadratic optimal control law based on state space method. The control system is simulated and studied. The results show that active pantograph can decreases the fluctuation of contact force and improves the system dynamic performance and current collection quality.