基于嵌入式系统的汽车温度精确控制研究

发布时间：2018-03-04 07:29

  本文选题：客车空调　切入点：模糊PID控制　出处：《河北科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着科学技术的进步,客车空调温度控制技术飞速发展,传统的温度控制技术难以满足人们对客车空调温度舒适性与稳定性的新要求,由于客车内部与外部环境难以做到绝对隔离,外部环境对于车内温度的影响因素一直存在,如何时刻根据车内温度的变化进行实时的调整,已成为影响客车空调系统控制性能的关键性因素。本论文针对客车空调采暖系统进行优化控制,首先介绍了客车空调采暖系统的组成,运用Matlab软件建模仿真比较结果的方式确立了运用模糊规则实时在线调整PID参数的智能控制算法,并将模糊PID控制表放到内存中,只需进行查表操作即可完成对温度数据的处理工作,大大节省了系统运行的时间,体现了实时性控制的特点。客车空调采暖系统采用主从结构布局,上下分工明确,下位机主要负责温度采集与电机控制工作,上位机主要负责算法控制以及温度显示工作,上位机与下位机通过CAN总线进行实时的数据交互,本论文有效地将μC/OS-Ⅱ移植到上位机中,应用程序以任务的形式运行在操作系统之上,系统根据任务的优先级进行任务的调度与管理工作,彼此之间互不影响,大大提高了系统的运算能力。本文成功地将模糊PID控制算法、嵌入式操作系统,CAN总线技术运用于客车空调采暖系统的优化控制当中,提高了温度控制精度,加速了客车空调温度控制智能化的进程。
[Abstract]:With the progress of science and technology, the temperature control technology of passenger car air conditioning is developing rapidly. The traditional temperature control technology can not meet the new requirements of the passenger car air conditioning temperature comfort and stability. Because the internal and external environment of the bus is difficult to achieve absolute isolation, the influence factors of the external environment on the internal temperature of the vehicle exist all the time, so how to adjust it in real time according to the change of the temperature inside the vehicle, It has become a key factor to affect the control performance of passenger car air-conditioning system. This paper focuses on the optimization control of bus air-conditioning heating system. Firstly, the composition of bus air-conditioning heating system is introduced. An intelligent control algorithm is established to adjust the parameters of PID by using fuzzy rules in real time, and the fuzzy PID control table is put into memory by the way of modeling and comparing the results of simulation with Matlab software. The processing of temperature data can be completed only by table checking operation, which greatly saves the running time of the system and embodies the characteristics of real-time control. The heating system of passenger car air conditioning adopts the master and slave structure layout, and the division of labor between the upper and lower parts is clear. The lower computer is mainly responsible for temperature collection and motor control, and the upper computer is mainly responsible for the algorithm control and temperature display. The upper computer and the lower computer interact with each other through the CAN bus in real time. In this paper, 渭 C / OS- 鈪，

本文编号：1564729