文档介绍：毕业设计(论文)说明书
课题名称:汽车主动悬架的模糊PID并联复合控制策略研究
系别电气与信息工程学院
专业自动化
班级 092班
学号 200900301052
姓名苏业刚
指导教师高远
2013 年 5 月 21 日
汽车主动悬架的模糊PID并联复合控制策略研究
摘要
汽车悬架系统是影响乘坐舒适性和操作稳定性的重要部件。汽车可控悬架系统能够通过对行驶路面、汽车的运行工况和载荷等状况的监控,实时产生所需的悬架控制作用,“主动地”调节悬架的特性和工作状态,使悬架的特性与行驶道路状况相适应,可有效提高汽车的乘坐舒适性和驾驶安全性(操纵稳定性),研制采用优良的控制策略和新型的电控技术的可控悬架是车辆悬架技术发展的重要趋势。控制策略是实现悬架系统最优控制的保证,也是当前悬架控制系统研究发展的一个重要方面。
本文以汽车主动悬架作为研究对象,首先建立二自由度1/4车体主动悬架数学模型,接着分别设计悬架系统的PID和模糊控制器,然后将PID控制器与模糊控制器进行并联,在MATLAB/Simulink环境中构建控制系统仿真模型,进一步开展悬架系统的复合控制策略仿真研究。仿真结果表明,在相同行驶工况条件下,相比单一的PID控制和模糊控制,模糊PID并联复合控制策略具有更好的控制效果,能明显降低汽车悬架的垂直振动速度和加速度,较好地提高了车辆乘坐舒适性和操纵稳定性[1]。
关键词:主动悬架;复合控制; PID控制;模糊控制;MATLAB。
Abstract
The automobile suspension system is an important part of a influence fort and operation stability. Auto controllable suspension system can through to the road, vehicle operation condition and load condition monitoring, real time to produce the required suspension control function, the "active" adjust the characteristic and the working state of suspension, the suspension characteristics of the driving and road conditions, which can effectively improve vehicle fort and driving safety (stability), the control strategy of developing by quality and controllable suspension of new type of electronic control technology is the important trend of vehicle suspension technology. Control strategy is the guarantee to realize the optimal control of suspension system, also the front suspension control system is an important aspect of research and development.
Based on automotive active suspension as the research object, first set up two degrees of freedom mathematical model for 1/4 vehicle active suspension and then design of suspension system PID and fuzzy controller respectively, then the PID controller and fuzzy controller in parallel, built in the MATLAB/Simulink environment control system simulation model, further suspension system of pound control strategy simulation research. Simulation results show that under the condition of same