轨道板张拉力模糊PID同步控制联合仿真分析

Co-simulation Analysis of Fuzzy PID Synchronous Control for Stretch-draw Force of Track Slab

为改善CRTSⅢ型高铁轨道板张拉成形工艺效率,可采用预紧力筋独立设置张拉杆的多通道同步张拉设备,但该设备张拉时依然存在螺纹连接滑移、锁紧空隙及液压系统特性参数不一致等问题,使多通道张拉力产生波动,导致预紧力筋内应力分布不均匀,影响轨道板张拉成形质量。为此,在多通道张拉设备液压系统运行原理分析基础上,进行AMESim/Simulink联合仿真分析,提出基于模糊PID的多通道张拉力波动控制方法,与传统PID控制策略对比仿真分析。结果表明,模糊PID算法具有更好的响应速度等控制性能,可实现不同负载干扰力和液压缸泄漏系数作用下的多通道张拉设备输出,将张拉力波动误差控制在1%以内,进而对轨道板内多路预紧力筋同步施加一致内应力,提高张拉成形质量。

In order to improve the stretch-draw molding process efficiency of CRTSⅢhigh-speed railway track slab,the multi-channel synchronous stretch-draw equipment can be used with independent stretch-draw rods for pre tightened tendons.However,there are still some problems such as thread connection slip,locking gap and inconsistent characteristic parameters of hydraulic system in the stretch-draw process of the equipment,which make the multi-channel stretch-draw forces fluctuate and lead to the uneven distribution of internal stress in the pre tensioned tendons and affect the stretch-draw molding quality of the track slab.Therefore,based on the operation principle analysis of the multi-channel stretch-draw hydraulic system,the AMESim/Simulink co-simulation models are established,and the multi-channel stretch-draw fluctuation control method is proposed based on fuzzy PID.Compared with the traditional PID control strategy,the simulation results show that the fuzzy PID algorithm has better control performance such as response speed.It can control the stretch-draw force fluctuation errors of multi-channel stretch-draw equipment within 1%under different load interference force and hydraulic cylinder leakage coefficient,and simultaneously apply consistent internal stress to the multi-channel pre tensioned tendons,so as to effectively improve the stretch-draw molding quality of the track slab products.