文档介绍：汽车空气悬架计算机控制系统设计
摘要
由于在平顺性和车高控制上的诸多优点,越来越多的客车生产商已经开始使用电子控制空气悬架,通过控制弹簧刚度和减振器的阻尼来获得好的平顺性和操纵稳定性。
本文设计对汽车在制动、转向、加速、高速等工况下的空气弹簧刚度的调节来实现对悬架刚度的控制,在不同车速下对车高的调节以减少风阻。通过介绍悬架的种类和特点,分析空气悬架当前发展状况,概述平顺性的研究内容,提出本文研究的主要内容和基本流程。文中以简化的汽车1/4悬架模型为基础,通过分析刚度和系统频率对平顺性的影响,得出空气悬架的主要控制参数。接着使用MATLAB/SIMULINK计算机仿真软件,模拟路面随机输入,仿真被动悬架及空气悬架的加速度变化,通过对比看出其优点。
MCS-96系列单片机在接口、抗干扰及运算速度方面的特点,使得其系列单片机在实现对悬架的控制方面有着较大的优势。本文使用MCS-96系列单片机汇编语言编译控制程序,编写出各功能子系统程序段,以顺序执行指令模式运行,通过对各传感器的信号来判断行驶状况,从而输出对应的控制信号。硬件使用80C196KC单片机。
关键字:空气弹簧电控悬架控制程序仿真单片机
Air Suspension Control System Design
ABSTRACT
As the car ride and the many advantages of high control, more and more bus manufacturers have begun using electronic control air suspension, by controlling the spring stiffness and damping shock absorbers to get a good fort and handling stability.
In this paper, we design to adjust the air spring stiffness to achieve the control of the suspension stiffness in the braking, steering, acceleration, speed and other working conditions. By adjusting the stiffness of the spring and shock absorber damping to reduce the wind resistance in high-speed condition. By introducing the suspension of the type and characteristics of the current development of air suspension, fort of an overview of the contents of this paper presented the main content and basic processes. By simplifying the car 1 / 4 suspension model, analyzing the stiffness and system frequency on the Ride, come to the main control parameters of air suspension. Then use the MATLAB / SIMULINK simulation software to simulate the random road input, simulation passive suspension and air suspension, acceleration changes, paring to see its advantages.
As the MCS-96 series MCU interface, interference, and the characteristics puting speed, makes the MCS-96 family of single chip to achieve the control of the suspension has a big advantage. This article uses the MCS-96 Microcontroller assembly piler control procedures, the preparation of the segment of each functional subsyste