共查询到19条相似文献,搜索用时 140 毫秒
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电子机械制动系统(EMB),以电驱动元件为制动执行器,取代传统的液压或气压制动执行器.是一种全新的制动理念.它具有的没有制动液体、反应快速、性能可靠及安全环保等特点使其拥有令人看好的前景.在国外.EMB的研究取得初步的成绩,Bosch、Siemens公司已经研制出了自己的部分试验成果,而国内的研究刚刚开始.文章阐述了电子机械制动系统的概念、结构组成、工作原理及性能特点,论述了其关键技术及发展. 相似文献
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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
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线控制动系统防抱死特性模糊控制方法的仿真研究 总被引:2,自引:1,他引:2
作者研究分析了直接影响汽车行驶安全性能的汽车制动系统的重要组成部分,阐述了以油或空气作为传力介质的传统制动系统必将被全电的制动系统——线控制动系统所取代,线控制动系统是未来制动系统的发展方向。介绍了线控制动系统的分类、结构和工作原理;建立了线控制动系统和制动执行器的数学模型,以1/4车辆模型为研究对象,设计了模糊控制器,并在Matlab/Simulink下进行了仿真分析。仿真结果表明,模糊控制对线控制动系统的防抱死特性取得了理想的控制效果。 相似文献
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新一代奥迪A6L轿车装备了电子机械式驻车制动系统(EPB)(图1),它用电子按键取代传统的手制动把手,同时还具有自适应辅助启动和紧急制动的功能,使车辆的制动安全和操作进一步得到提高.电子机械式驻车制动系统的应用使得汽车维修人员更换制动摩擦片的常规方法在奥迪A6L轿车上已不适用,甚至不能拆下该车制动摩擦片.因此,维修人员需要学习正确的拆卸和安装操作步骤. 相似文献
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正(接上期)2.电子机械式制动助力器eBKV制动助力通过电子机械式制动助力器eBKV产生。e-up车型中eBKV的优点包括不依赖低压的制动助力器、联合制动功能、改进的压力升高动态特性、较高的压力点精度和均匀的制动踏板特性/踏板力。(1)结构:电子机械式制动助力器安装在发动机舱中,它与制动系统蓄压器VX70和ESC/ABS相连接。电子机械式制动助力器包括制动助力器控制单元J539、发动机/变速器单元、eBKV推杆和串联式制动主缸,其外观如图26所示。 相似文献
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Analysis of a regenerative braking system for Hybrid Electric Vehicles using an Electro-Mechanical Brake 总被引:3,自引:0,他引:3
J. K. Ahn K. H. Jung D. H. Kim H. B. Jin H. S. Kim S. H. Hwang 《International Journal of Automotive Technology》2009,10(2):229-234
The regenerative braking system of the Hybrid Electric Vehicle (HEV) is a key technology that can improve fuel efficiency
by 20∼50%, depending on motor size. In the regenerative braking system, the electronically controlled brake subsystem that
directs the braking forces into four wheels independently is indispensable. This technology is currently found in the Electronic
Stability Program (ESP) and in Vehicle Dynamic Control (VDC). As braking technologies progress toward brake-by-wire systems,
the development of Electro-Mechanical Brake (EMB) systems will be very important in the improvement of both fuel consumption
and vehicle safety. This paper investigates the modeling and simulation of EMB systems for HEVs. The HEV powertrain was modeled
to include the internal combustion engine, electric motor, battery and transmission. The performance simulation for the regenerative
braking system of the HEV was performed using MATLAB/Simulink. The control performance of the EMB system was evaluated via
the simulation of the regenerative braking of the HEV during various driving conditions. 相似文献
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新型电控机械制动系统制动效能分析 总被引:1,自引:1,他引:0
在建立了汽车制动过程的动态分析模型、传统的液压制动器模型和新型的电控机械制动器模型基础上,通过计算机仿真对比分析了它们的制动效能。研究结果表明新型电控机械制动器比传统液压制动器具有响应速度快、制动效能高等优点。 相似文献
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In the future, the conventional hydraulic brake system in automobiles will be removed and replaced by an electrically operated brake system called brake-by-wire. The brake-by-wire units, such as the EMB (Electro-Mechanical Brake), provide better braking performance by directly controlling the brake motor and are environmentally friendly because they do not use hydraulic fluid. For implementation of the EMB systems, reliable and robust fault detection and diagnosis methods become increasingly important. In this study, a sensor fault diagnosis method is proposed with parity space and observer approaches to detect faults in the motor current sensor, speed (or position) sensor and clamping force sensor. The proposed method is verified through a closed-loop simulation using Matlab/Simulink, and the simulation result is compared with the HILS bench test results. 相似文献
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This paper presents a fault-tolerant brake torque controller for four-wheel-distributed braking systems with in-wheel motors and Electro-Mechanical Brakes (EMB). Mechanical and electrical faults can degrade the performance of the EMB actuators and, thus, their effects need to be compensated in vehicle dynamics level. In this study, the faults are identified as performance degradation and expressed by the gains of each actuator. Assuming the brake force distribution and the regenerative braking ratios, the over-actuated braking system is simplified into a two-input system. A sliding mode controller is designed to track the driver’s braking and steering commands, even if there exist faults in EMBs. In addition, adaptive schemes are constructed to achieve the fault-tolerant control in braking. The proposed controller and strategies are verified in the EMB HILS (Hardware-in-loop-simulation) unit for various conditions. 相似文献
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文章结合电涡流缓速器和再生制动能量回收技术的优点,提出了能量回收式电涡流缓速器制动补偿策略。利用再生制动系统提供的制动力矩为电涡流缓速器在持续制动过程中的制动力矩热衰退予以补偿。以GB12676-2014政策法规为验证标准,车辆在满载情况下在7%的坡道上保持以30km/h的车速匀速行驶5km为仿真目标,对某商用车型进行仿真分析。验证了该策略使得实际产生的总制动力矩始终能满足驾驶员的制动需求,可以延缓电涡流缓速器温升,保障车辆行车安全。 相似文献
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F. Uffelmann Direktor: Prof. Dr.-Ing. M. Mitschke 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1978,7(4):183-201
Simulation of Steering and Braking Behaviour of Tractor-Semitrailer Vehicles in Extreme Situations
This paper deals with the simulation of the behaviour of tractor-semitrailer vehicles at braking on wet, slippery road surface. The nonlinear model used for the computation enables to simulate extreme situations at wheel locking and swerving
The instabilities during braking such as jackknifing and trailer swing as well as non steerability are investigated. Straightline braking shows the influence of cornering on the behaviour during braking in a turn. 相似文献
This paper deals with the simulation of the behaviour of tractor-semitrailer vehicles at braking on wet, slippery road surface. The nonlinear model used for the computation enables to simulate extreme situations at wheel locking and swerving
The instabilities during braking such as jackknifing and trailer swing as well as non steerability are investigated. Straightline braking shows the influence of cornering on the behaviour during braking in a turn. 相似文献
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介绍了用于EMB系统研究的硬件在环仿真试验台的搭建方法,对试验台的总体结构设计、机械系统设计、控制电路设计以及用于仿真试验的仿真模型进行了初步的探讨,并通过试验证实了这一技术的可行性和应用前景。 相似文献