汽车起停系统建模、仿真与验证研究

发布时间：2018-05-30 09:12

本文选题：汽车 + 起停系统　；参考：《吉林大学》2016年硕士论文

【摘要】：随着人们对环境和化石能源消耗关注度的提升,针对汽车的节能减排研究越来越受到重视。起停系统因其较低的装配成本和较好的节油效果,得到各个车企的重视且发展迅速。由于起停系统控制发动机运行与否,对整车的驾驶性能、需要供能的设备和系统影响较大,需要引起足够重视,且有较大的完善空间。本文理论研究结合工程实际需求,对起停系统控制策略进行详细分析和建模;对实验室原有的车辆动力学模型进行了改进和完善;搭建了起停控制器的仿真与验证平台,并在此平台上对起停系统进行了示范性验证和评价。本文主要完成了以下方面的工作:1.研究起停系统控制及其与整车其他系统的关联接口。对起停控制器的控制策略和逻辑关系进行逐层分解,分析各输入输出信号间的相互关系。并对起停系统与其他系统的关联接口进行梳理总结。文中将这些信号归为两类:一类体现整车和发动机运行状态及输入状态的动力学模型相关变量;另一类由传感器输入的关联系统信号。2.在MATLAB/Simulink环境下建立了起停控制器模型。依据控制逻辑分析介绍了模型的搭建过程,并采用模拟输入的方法对该模型的控制策略进行了验证。3.对车辆动力学模型进行了改进,尤其对动力传动系统的部分模型进行了重建。主要改进原则是满足起停系统瞬态模型的需求,以及满足信号完备性原则,建立缺少部分的模型。经验证满足瞬态动力学要求,能够跟起停系统联合实时仿真,并满足接口需求。4.基于MATLAB/Simulink中的S-Function功能搭建仿真平台,实现起停控制器模型与车辆模型联合仿真。并采用不同方法对起停系统进行了评价。
[Abstract]:With the increasing attention to the environment and fossil energy consumption, more and more attention has been paid to the research of energy saving and emission reduction. Because of its low assembly cost and better fuel saving effect, the starting and stopping system has been paid attention to and developed rapidly. As the starting and stopping system controls the engine operation or not, it has a great influence on the driving performance of the whole vehicle, the equipment and the system that need to supply energy, which need to be paid enough attention to, and there is great room for improvement. In this paper, the control strategy of the starting and stopping system is analyzed and modeled in detail, the original vehicle dynamics model is improved and perfected, and the simulation and verification platform of the starting and stopping controller is built. On this platform, demonstration verification and evaluation of the starting and stopping system are carried out. This paper mainly completed the following aspects of work: 1. This paper studies the control of starting and stopping system and its interface with other systems of the whole vehicle. The control strategy and logic relation of the starting and stopping controller are decomposed layer by layer, and the relationship between the input and output signals is analyzed. At the same time, the related interface between start and stop system and other systems is summarized. In this paper, these signals are classified into two categories: one is the correlative variable of the dynamic model which represents the running state and the input state of the whole vehicle and the engine, and the other is the signal of the correlated system, which is input by the sensor. The starting and stopping controller model is established in MATLAB/Simulink environment. According to the control logic analysis, the process of building the model is introduced, and the control strategy of the model is verified by the method of simulation input. The vehicle dynamics model is improved, especially the partial model of power transmission system is reconstructed. The main improvement principle is to satisfy the demand of the transient model of the starting and stopping system, and to satisfy the principle of signal completeness, and to establish the model which lacks part of the model. It is proved that it can meet the requirement of transient dynamics and can be combined with the real-time simulation of the starting and stopping system, and meet the interface requirement. 4. 4. Based on the S-Function function in MATLAB/Simulink, the simulation platform is built to realize the joint simulation of the starting and stopping controller model and the vehicle model. Different methods are used to evaluate the starting and stopping system.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.6

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