汽车变速箱加载试验台电控系统设计

发布时间：2018-07-01 17:03

本文选题：变速箱试验台 + 电控系统　；参考：《北方工业大学》2017年硕士论文

【摘要】：变速箱加载试验台是变速箱下线检测的关键设备,试验台电控系统是试验台完成试验任务的重要基础,一直是试验台开发领域的重要课题之一,随着试验台性能的提升,对其电控系统提出了更高的要求,电控系统的好坏将直接决定试验台研制是否成功。依托于某新能源汽车试验台,结合国内外研究成果并根据客户要求搭建一套变速箱试验台电控系统,并以其为研究对象,设计了系统组成、控制结构和控制策略。针对生产线快节奏的要求通过全自动辊道将试验台同生产线对接,将试验台纳入装配线体系中,在试验台系统内部,通过辊道将各工位串联起来,提高了系统的自动化率与生产效率。通过直流电机与异步电机数学模型对比了两种驱动加载方式的优缺点,然后推导了异步电机在定子坐标系下的电磁转矩模型,分析了电压空间矢量对电磁转矩的影响,给出一种DTC控制结构,提高了动态加载精度。对传统的直流母线结构进行了优化使系统更加紧凑,采用独立整流器布置并进行了响应与负载分析,分析了工作状态中直流母线的变化特性,计算了系统反馈率,经测试直流母线反馈率达到65%。采用交叉耦合控制方法,建立传动系统理想动力学模型,针对转动惯量不同、负载扰动的问题提出控制轮间转速差的控制策略,然后借鉴"主—从控制"的优点提出了一种改进的反向交叉耦合控制方法解决了差速器两端转速不匹配的问题,设计了模糊PID控制器实现了控制参数的自整定,提高了系统对环境的适应性。最后对文中反向交叉耦合控制方法进行测试,测试了系统的同步性与追随性,试验效果达到了设计要求,现已随新能源汽车变速箱试验台一同交付业主使用,并已通过了现场验收证明了本套系统设计的可行性,相较该企业老式试验台,提高了设备性能,为企业节省了成本,创造了良好效益。
[Abstract]:The gearbox loading test bench is the key equipment for detecting the gearbox downline. The test bench electronic control system is the important foundation for the test bench to complete the test task, and has been one of the important topics in the field of development of the test bed. With the improvement of the performance of the test bed, A higher demand is put forward for the electronic control system, which will directly determine the success of the development of the test rig. Based on a new energy vehicle test bench, combined with the domestic and foreign research results and according to customer requirements to build a set of transmission test stand electronic control system, and take it as the research object, designed the system composition, control structure and control strategy. In order to meet the requirement of fast rhythm of the production line, the test bed is connected with the production line through the automatic roller table, and the test bed is brought into the assembly line system. In the test bed system, the stations are connected in series through the roller table. The automation rate and production efficiency of the system are improved. The advantages and disadvantages of the two driving modes are compared by the mathematical models of DC motor and asynchronous motor. Then the electromagnetic torque model of induction motor in stator coordinate system is derived, and the influence of voltage space vector on electromagnetic torque is analyzed. A DTC control structure is presented to improve the dynamic loading accuracy. The traditional DC bus structure is optimized to make the system more compact. The independent rectifier is arranged and the response and load are analyzed. The variation characteristics of DC bus in the working state are analyzed and the feedback rate of the system is calculated. The feedback rate of DC bus is 65. An ideal dynamic model of transmission system is established by using cross-coupling control method. A control strategy is proposed to control the rotational speed difference between wheels for the problems of different moment of inertia and disturbance of load. Based on the advantages of master-slave control, an improved reverse cross-coupling control method is proposed to solve the mismatch between the two ends of the differential speed. A fuzzy pid controller is designed to realize the self-tuning of the control parameters. The adaptability of the system to the environment is improved. Finally, the reverse cross coupling control method is tested, and the synchronization and tracking of the system are tested. The test results meet the design requirements, and have been delivered to the owner with the new energy vehicle gearbox test bench. The feasibility of the system design has been proved by field acceptance. Compared with the old test bed, the equipment performance has been improved and the cost saved and good benefit created for the enterprise.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U467.52;TP273

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