共查询到19条相似文献,搜索用时 109 毫秒
1.
2.
在一种新型电磁制动器的基础上,应用ABS的控制原理和基于路面附着系数的方法对其实施控制,利用Matlab/Simulink建立了车辆动力学、电磁制动器以及基于路面附着系数控制器的数学模型,并进行仿真计算,为这种新技术的设计和实现提供了理论依据。 相似文献
3.
制动器力学模型对其制动效能的影响 总被引:4,自引:0,他引:4
本文通过动力学数值仿真,研究制动器力学型的选取对其制动效能的影响问题,讨论了制动器动态特性与制动效能之间的关系,指出了在制动器动态设计存在的不足之处,给出若干动态设计的指导性准则和依据。 相似文献
4.
盘式制动器的制动振动噪声是一个复杂的非线性动力学问题。文章利用有限元软件建立了基于面接触的有限元模型,克服简单利用弹簧来模拟接触的不足,通过复特征值分析预测制动噪声。通过改变摩擦因数、制动力、阻尼及温度等参数,建立了符合实际工况的制动器有限元模型,并分析这些参数对系统稳定性的影响。结果表明降低温度、减小摩擦因数、减小制动力和增大阻尼可以减小制动器的制动噪声。 相似文献
5.
随着我国科学技术的发展,经济水平的提高,汽车电子机械技术也实现了快速的进步。在汽车电子机械制动的研究中,为了提高电子制动器的制动效能,加强对它的分析,建立了相关的汽车电子制动器的数学模型和水平路面上汽车制动时整车动力学模型。通过仿真软件的研究和比较,发现汽车电子机械制动器的制动效能相较于传统的液压制动器的制动效能更好。因此,为汽车电子机械制动器的研究和使用提供了依据。文章则主要根据汽车电子机械制动器的模型,对其效能进行了相关的分析。 相似文献
6.
7.
8.
对现在商用车后桥主要使用的液压鼓式制动器及液压盘式制动器的结构进行简要分析,并对其性能和优缺点进行对比分析;另外简要介绍一种新型行驻车一体盘式制动器,并与传统盘式及鼓式制动器进行对比分析. 相似文献
9.
分析了气压盘式制动器在城市客车上应用的可能性与可行性,重点论述了5.5T盘式制动器前桥的开发,并对盘式制动器前桥与鼓式制动器前桥的制动力矩进行对比计算。 相似文献
10.
11.
12.
M. S. Xie G. R. Zhang J. H. Li R. Fritsch 《International Journal of Automotive Technology》2014,15(4):565-571
Automotive brake systems today have many factors that can contribute to brake noise. Modern approaches to reduce the propensity of brake noise mostly target high frequency brake squeal. A more difficult constituent of brake noise to address is low frequency moan, which is typically caused when the brake system excites a suspension member with a constrained natural frequency in the range of excitation. Although most modern CAE techniques utilized to diagnose and solve brake noise issues focus on new brake pad condition, this paper will show the benefit of understanding a common wear mechanism “Taper Wear,?and attempt to correlate its effects on brake moan. In order to study this phenomenon, a finite element model of a disc brake is established, and a complex eigenvalue analysis (CEA) of the brake system is performed. The propensity of brake moan noise is evaluated on basis of damping ratio of a dynamic brake system model. By using the finite element model, effects of the brake pad taper wear on brake moan noise is studied. The results show that the brake pad taper wear is a significant factor for generating the instability causing the brake moan noise. The study is performed at various levels of brake pad taper wear. When the brake pad taper wear is more than 0.5 mm, the value of negative damping ratio rapidly increases, and the propensity of brake moan noise is greatly magnified. In this study, the simulation result correlated well with the test result, which provides the theory and guidance for brake moan noise control. 相似文献
13.
14.
15.
介绍气制动大客车制动力以及制动力矩的计算方式,并通过实际气制动客车制动力矩的计算和数据对比.为今后在客车制动系统设计当中,提供有效理论依据. 相似文献
16.
17.
D. B. Sonawane K. Narayan V. S. Rao S. C. Subramanian 《International Journal of Automotive Technology》2011,12(5):697-704
Most commercial vehicles such as buses and trucks use an air brake system, often equipped with an S-cam drum brake, to reduce
their speed and/or to stop. With a drum brake system, the clearance between the brake shoe/pad and the brake drum may increase
because of various reasons such as wearing of the brake shoe and/or brake drum and drum expansion caused by high heat generation
during the braking process. Hence, to ensure proper functioning of the brake system, it is essential that the clearance between
the brake shoe and the brake drum is monitored. In this paper, we present a mathematical model for the mechanical subsystem
of the air brake system that can be used to monitor this clearance. This mathematical model correlates the push rod stroke
transients and the brake chamber pressure transients. A kinematic analysis and a dynamic analysis of the mechanical subsystem
of the air brake system were performed, and the results are corroborated with experimental data. 相似文献
18.
发动机制动、排气制动与缓速器联合作用时的非连续线性控制系统的研究 总被引:4,自引:3,他引:4
针对客车发动机制动、排气制动的制动扭矩比较小的问题,提出采用发动机制动、排气制动与缓速器联合作用的持续制动方式,并且针对汽车在山区道路下坡行驶过程中对稳定车速的要求,进行了相应的控制系统设计。模拟分析结果表明:该控制系统可以保证汽车在不采用行车制动器的条件下,利用发动机制动、排气制动与缓速器联合作用的持续制动方式,在各种坡度的坡道上以希望的车速稳定下坡行驶,为汽车在山区道路连续下坡行驶的制动安全性提供了一个合理的解决方案。 相似文献
19.
根据对汽车制动过程的受力分析,建立理想制动力I曲线,初步确定前后轴制动力分配比,据ECE制动法规优化建模后,最终确定最佳制动力分配比,进而选定制动阀。 相似文献