YL450t运梁车电液控制系统设计与实践

发布时间：2018-04-29 07:42

本文选题：运梁车 + 电液比例　；参考：《燕山大学》2014年硕士论文

【摘要】：按照中铁二十三局成都地铁2号线东延段线25m、30m双线二箱砼箱梁的运输要求，燕山大学与北京百善重工有限公司合作研制了用于预制梁运输和架设的YL450t运梁车，本课题主要对YL450t运梁车电液控制系统进行了设计研究。首先，按照使用工况要求，确定了YL450t运梁车的设计参数，在整车机械结构设计方案的基础上，对整车液压系统进行了全面设计。选择了实用合理的驱动行走方案，并进行了闭式系统的设计计算；针对开式系统中关键部分的转向系统，研究了其转向原理，建立了数学模型，并最终确定了比例多路阀与负载敏感技术相结合的转向方案；对液压系统中关键部件进行了计算选型，最后给出了整车的液压系统原理以及关键部件的选用。其次，针对运梁车转向中出现的转向不够协调，，响应较慢等问题，分别利用常规PID和模糊PID控制策略对运梁车转向系统进行了优化。建立运梁车转向系统的数学模型，设计常规PID和模糊PID控制器，应用MATLAB/Simulink软件，分别对两种控制策略进行了转向系统仿真分析，与常规PID控制策略相比，模糊PID控制可以更加有效提高运梁车大负载下的转向速度，减小转向的稳态误差。最后，设计与实现了基于CAN总线的LY450t运梁车电控系统。针对运梁车主要液压元件的电气特性，合理选择了相关电控元件，设计了电液控制系统，包括运梁车网络拓扑结构设计，控制器布局与针脚分配等；在BODAS软件开发环境下，编写了运梁车实现各种模式下的动作任务的控制程序等。
[Abstract]:According to the transportation requirements of 25m / 30m double-line two-box concrete box girder in the east extension of Chengdu Metro Line No. 2 of China Railway 23 Bureau, Yanshan University and Beijing Beshan heavy Industry Co., Ltd. have jointly developed a YL450t beam conveyer for the transportation and erection of prefabricated beams. In this paper, the electric-hydraulic control system of YL450t beam-carrying vehicle is designed and studied. Firstly, according to the requirements of the working conditions, the design parameters of the YL450t beam carrying vehicle are determined, and the hydraulic system of the whole vehicle is designed comprehensively on the basis of the mechanical structure design scheme of the whole vehicle. The practical and reasonable driving scheme is selected, and the design and calculation of the closed system are carried out, and the steering principle of the steering system is studied, and the mathematical model is established for the key part of the open system. Finally, the steering scheme combining proportional multi-way valve with load-sensitive technology is determined, and the key components in hydraulic system are calculated and selected. Finally, the principle of hydraulic system and the selection of key components are given. Secondly, aiming at the problems of uncoordinated steering and slow response, the steering system of beam carrier is optimized by using conventional PID and fuzzy PID control strategy, respectively. The mathematical model of steering system of beam conveyer is established, and the conventional PID and fuzzy PID controller are designed. The two control strategies are simulated and analyzed by using MATLAB/Simulink software. Compared with the conventional PID control strategy, the two control strategies are compared with the conventional PID control strategy. Fuzzy PID control can effectively improve the steering speed and reduce the steady state error of steering. Finally, the electronic control system of LY450t beam carrier based on CAN bus is designed and implemented. According to the electrical characteristics of the main hydraulic components of the beam conveyer, the relevant electronic control elements are reasonably selected, and the electro-hydraulic control system is designed, including the design of the network topology, the layout of the controller and the distribution of the pin, etc. The control program is compiled to realize the action task in various modes.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.3;TP273

【参考文献】