汽车防抱死制动系统建模仿真及控制方法的研究

发布时间：2018-04-07 18:25

本文选题：ABS　切入点：制动性能　出处：《辽宁工业大学》2014年硕士论文

【摘要】：汽车防抱死制动系统（ABS）在汽车制动时，可以自动调节车轮制动力，，防止车轮抱死以取得最佳制动效果。它是提高汽车制动的安全性能最先进的技术并且被有效和广泛的应用，现已成为现代汽车制动系统的关键部件。由于我国对ABS研究较晚，所以我们所拥有的自主知识产权的产品不多。因此，ABS技术的研究发展对我国汽车产业具有现实意义，它已成为中国汽车产业的重要课题。本文首先在大量文献研究的基础上，介绍了ABS的工作原理、构成和发展趋势。然后，建立车辆模型，包括单轮车辆模型、轮胎模型和制动系统模型，在Matlab中进行了仿真实现。本文分别研究了逻辑门限值控制法和模糊控制法。逻辑门限值控制的特点是无需建立特定系统的数学模型，根据ABS的工作原理，利用车轮加减角速度门限值和参考滑移率的组合，构成控制逻辑，使滑移率在峰值附着系数附近波动。采用Matlab/Simulink仿真环境,对不同附着路面下有、无ABS逻辑门限值控制的制动效果进行仿真对比分析，验证了基于逻辑门限值的ABS的控制效果：使制动减速度增加，制动时间和制动距离减小。另外，根据模糊理论建立了一种简单的模糊控制器，并将其应用在车辆的仿真系统中。仿真结果表明，该模糊控制器应用于汽车ABS系统取得良好的控制效果，且算法简单、具有实际应用价值。
[Abstract]:ABS (Anti-lock braking system) can automatically adjust the braking force of the wheel and prevent the wheel from locking in order to obtain the best braking effect.It is the most advanced technology to improve the safety performance of automobile brake and has been used effectively and widely. It has become the key component of modern automobile braking system.Due to the late study of ABS in China, we have few products of our own intellectual property rights.Therefore, the research and development of ABS technology is of practical significance to China's automobile industry, which has become an important subject in China's automobile industry.This paper first introduces the working principle, composition and development trend of ABS on the basis of a large number of literatures.Then, the vehicle model, including single wheel vehicle model, tire model and braking system model, is established and implemented in Matlab.In this paper, the logic threshold control method and fuzzy control method are studied respectively.The characteristic of logic threshold control is that it is not necessary to establish a mathematical model of a specific system. According to the working principle of ABS, the control logic is constructed by combining the wheel angular velocity threshold and the reference slip ratio.The slip ratio fluctuates near the peak adhesion coefficient.Using Matlab/Simulink simulation environment, the braking effect of ABS free logic threshold control under different attached pavement is compared and analyzed. The results show that the control effect of ABS based on logic threshold value is increased.Braking time and braking distance are reduced.In addition, a simple fuzzy controller based on fuzzy theory is established and applied to vehicle simulation system.The simulation results show that the fuzzy controller has a good control effect in automobile ABS system, and the algorithm is simple and has practical application value.
【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U463.526

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