基于最优载荷的受电弓自适应终端滑模控制

摘要

For pantograph-catenary system, there exists Pareto optimal load that the pantograph-catenary has the best electric and mechanical properties in certain conditions. The fuzzy adaptive terminal sliding mode controller of pantograph is designed in order to improve the performance of the pantograph-catenary and run under optimal load. The uncertainty of the system model is approximated by the fuzzy system, the finite-time convergence is ensured by the terminal sliding manifold. Fuzzy rules are also used to obtain the switch control law in order to reduce chattering on sliding manifold. The stability of the closed loop system is proved using the Lyapunov stability theory. The simulation results show that the proposed method can greatly weaken the effects of parameter perturbation and extraneous disturbance as well as achieve a good tracking performance for optimal load.%对于弓网系统而言,一定工况下存在使电气和机械性能最佳的Pareto最优载荷,为提高弓网性能使之以最优载荷运行,设计了受电弓模糊自适应终端滑模控制器.模型不确定性采用模糊系统进行逼近,终端滑模流形保证误差的有限时间收敛,用模糊规则得到切换控制律以减弱抖振,并运用Lyapunov稳定性理论证明了闭环系统的稳定性.仿真结果表明,设计的控制器能有效减弱模型参数摄动和干扰的影响,对最优载荷具有较好的跟踪性能.