AUDI盘式制动器的非线性滞环模型

以AUDI盘式制动器为研究对象，在JF－132型汽车制动器试验台上进行防抱制动器的模拟试验，在获得大量实验数据的基础上，运用曲线拟合和优化技术，建立一种可以模拟制动压力－力矩动态响应非线性滞环特性的经验模型，在相同制动压力输入的前提下，比较模型的理论计算结果与试验测量结果，分析所建模型的有效性和精确性。     

重型汽车用盘式制动器的结构性能分析

介绍了四种常见的盘式制动器的结构及其特点，从制动减速度、制动时制动器起作用的时间、制动器的效能与摩擦系数的关系及迟滞量等方面对盘式制动器与鼓式制器进行对比、分析，说明盘式制动器在制动效能、制劝效能的稳定性以及制动时汽车的方向稳定性上比鼓式制动器具有明显的优势，理论和试验表明盘式制动器与ＡＢＳ、ＡＳＲ、ＥＢＳ等系统匹配时可简化系统结构、优化系统结构，并地重型汽车装用盘式制动器带来的制动系统的相关关系     

基于回归分析理论的盘式制动器制动温度预测研究

针对盘式制动器制动温度过高导致的摩擦制动失效问题,文章借助ANSYS软件建立了盘式制动器温度场仿真模型,并结合回归分析方法进行非线性回归分析,计算了不同初始速度下制动盘的最高温度。结果表明,制动最高温度和初速度之间近似为线性关系,有限元仿真与回归分析的结果基本吻合,预测结果和有限元分析结果相对误差仅为1.7%,验证了所建立的温度预测模型是可靠的,为制动器设计过程中的温度预测提供参考。     

汽车气压盘式制动器的结构特点与性能分析

介绍了几种国内外重型汽车气压盘式制动器的结构及其特点,从左右轮制动力差异,制动器的效能因数与摩擦系数的关系及迟滞量等方面对盘式制动器与鼓式制动器进行性能对比分析,说明盘式制动器在制动效能、制动效能的稳定性以及制动时汽车的方向稳定性上比鼓式制动器具有明显的优势,理论和试验表明盘式制动器与ABS、ASR、EBS等系统匹配时可简化系统结构、优化系统性能,并对重型汽车装用盘式制动器带来的制动系统的相关问题进行了探讨.     

某型轿车盘式制动器制动噪声的控制

对某型轿车盘式制动器进行了台架试验,发现该制动器主要制动噪声频率在3kHz附近。采用有限元FEA分析手段对制动盘、制动钳壳体、制动钳支架和摩擦片进行了振动特性分析。结果表明,制动钳支架的7阶振动模态是导致制动噪声产生的原因之一。对制动钳支架结构设计进行了改进,并对装有改进后制动钳支架的盘式制动器进行了台架试验。结果表明,制动器冷态制动噪声从100.5 dB下降为73.4 dB,达到了该车型对制动器噪声的限值要求。     

摩托车盘式制动器技术要求与台架试验

摩托车盘式制动器存在着基本性能要求，对国产摩托车盘式制动器与进口同类产品在制动性能、热衰退性、热恢复性、磨合性等性能上进行了台架对比试验，从而验证了摩托车盘式制动器国产化的技术水平。     

盘式制动器性能试验台模拟机的研制

对盘式制动器工作原理及试验原理进行了研究，研制开发出了盘式制动器性能试验台模拟机。介绍了模拟机主机部分的设计，实现飞轮组的多片组合，设计出驱动制动系统和单片机测试系统，以保证系统的模拟精度。     

制动压力非对称动态响应的研究

在开发高速防滑制动ＡＢＳ系统时，需要考虑制动器制动压力的动态响应过程。指导了盘式制动器制动压力对电磁阀开度响应的数学模型，并分析了制动压力在增压和减压方向上频响的不对称性。通过对Ｖｏｌｖｏ盘式制动器制动压力的控制试验，验证了有关的结论，给出了模型的具体数据。     

气压盘式制动器的优势

盘式制动器的制动响应性能、抗热衰退性及制动效能稳定性均明显优于鼓式制动器。气压盘式制动器无制动增势作用，制动过程平和，盘式制动器能大大改善城市客车的制动噪声问题，大大提高了商用车（尤其是城市公交车）制动的环保性和舒适性。     

具有迟滞模拟记忆功能的奥迪盘式制动器可变线性模型

本文以奥迪１００盘式制动器为研究对象，建立了一种可模拟制动压力－力矩响应迟清点特性的可变线性模型，首先，介绍在ＪＦ－１３２型汽车制动器试验台上进行防抱制动器模拟试验的方法，其次，在获得大量试验数据的基础上，运用曲线拟合和优化技术，建立制动压力－力矩关系的线性模型，心滞模型为线笥模型，最后，在相同制动压力输入的前提下，把模型的理论计算民试验结果进行对比分析了模型的有效性和精确性。     

Effect of wheel-slip prevention based on sliding mode control theory for railway vehicles

It is important to consider the robustness when designing brake control systems, because of the model's uncertainties that result from the nonlinear characteristics of wheel-to-rail adhesion forces and brake material friction coefficients. This paper presents the experimental results from the new wheel-slip prevention control using nonlinear robust control theory. The authors performed experiments for the proposed wheel-slip prevention control to compare it with the conventional control laws. The experimental results proved the comparative effectiveness of the proposed control and showed high brake performance under nonlinear characteristics of brake dynamics.     

试验构建鼓式制动器的摩擦模型

针对鼓式制动器在高制动初速、高气压下制动力矩的台架试验值与设计值存在较大偏差的问题，对试验测量的制动器制动力矩进行二元线性回归分析，建立了鼓式制动器的幂函数摩擦模型。进行了显著性检验和失拟性检验，检验结果验证了所建立的摩擦模型有效，可提高整车制动效能模拟计算精度。     

Analysis of disc brake instability due to friction-induced vibration using a distributed parameter model

This paper deals with friction-induced vibration of a disc brake system with a constant friction coefficient. A linear, lumped, and distributed parameter model to represent the floating caliper disc brake system is proposed. The complex eigenvalues are used to investigate the dynamic stability, and, in order to verify simulations which are based on the theoretical model, an experimental modal test and dynamometer test are performed. The comparison of experimental and theoretical results shows good agreement, and the analysis indicates that modal coupling due to friction forces is responsible for disc brake squeal. Also, squeal type instability is investigated, using a parametric analysis. This indicates which parameters have influence on the propensity of brake squealing. This is helpful for validating the analysis model and establishing confidence in the experimental results of the modified system. These results may also be useful during system development or diagnostic analysis.     

Coupled thermo-mechanical analysis and shape optimization for reducing uneven wear of brake pads

In vehicle braking systems, the non-uniform contact pressure distribution on the brake pad is a major cause of uneven wear. The experimental approach of the wear phenomenon is the time consuming and costly. For this reason, a threedimensional finite element (FE) model of a brake system is presented for numerical simulation in this paper. A coupled thermo-mechanical analysis is carried out to confirm the non-uniform contact pressure distribution. A correlation between the non-uniform contact pressure and uneven wear is confirmed by measuring the amount of wear in the brake pad. The shape optimization of the brake pad is performed to reduce the uneven wear. In addition, the simulation results, such as natural frequency and temperature, are compared to experimental results.     

Verification of pneumatic railway brake models

The article presents a survey of diverse methods for validation of pneumatic train brake modelling. Various experimental measurements of railway pneumatic brakes were made chiefly on a test stand at Poznań University of Technology; other test stands and some results have been taken from the literature. The measurements, some of them unconventional, were performed on separate pneumatic elements, brake devices, the brake pipe and fragments thereof. Mechanical devices were also included. The experimental measurement results were used for the verification of numerical models and for the determination of parameters. The latter was partially performed using an optimisation method.     

Model-based analysis of the mechanical subsystem of an air brake system

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.     

Design of a hydraulic anti-lock braking modulator and an intelligent brake pressure controller for a light motorcycle

The object of this paper is to design a new hydraulic modulator and an intelligent sliding mode pulse width modulation (PWM) brake pressure controller for an anti-lock braking system, for application to light motorcycles. The paper presents a design principle and a mathematical analysis of the hydraulic anti-lock braking modulator. The intelligent sliding mode PWM brake pressure controller based on vehicle acceleration is designed and tested. A three-phase pavement experiment and a rear brake influence test are undertaken to verify the performance of the controller and the modulator. A light motorcycle is built for the real vehicle anti-lock braking experiments. The experimental results show that both the intelligent controller and the hydraulic modulator designed in the study perform well in the anti-lock braking operation.     

Effect of wheel-slip prevention based on sliding mode control theory for railway vehicles

It is important to consider the robustness when designing brake control systems, because of the model's uncertainties that result from the nonlinear characteristics of wheel-to-rail adhesion forces and brake material friction coefficients. This paper presents the experimental results from the new wheel-slip prevention control using nonlinear robust control theory. The authors performed experiments for the proposed wheel-slip prevention control to compare it with the conventional control laws. The experimental results proved the comparative effectiveness of the proposed control and showed high brake performance under nonlinear characteristics of brake dynamics.     

汽车制动器相关参数关系初探

汽车制动器的摩擦面积、摩擦力、制动力矩的关系比较复杂,成非线性关系。对HFJ6350后制动器进行试验,以试验结果为依据,讨论三者之间的关系。     

Model-based control of an electropneumatic brake system for commercial vehicles

A properly functioning brake system is critical for ensuring the safe operation of any vehicle on roadways. Commercial vehicles such as trucks, tractors-trailers and buses are equipped with an air brake system that uses compressed air as the energy transmitting medium. This paper presents a model-based control scheme for an electropneumatic brake system for use in commercial vehicles. A mathematical model for an electropneumatic brake system was developed and corroborated with experimental data. A control scheme was developed based on this model and was used to regulate the pressure of air inside the brake chamber according to a desired pressure trajectory. This control scheme was implemented on an experimental test bench, and its performance was studied for various values of the controller parameter. The control scheme was tested for various desired pressure trajectories reflecting actual brake operation.