共查询到18条相似文献,搜索用时 125 毫秒
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ABS系统与车辆的匹配是一个亟待解决的课题。为了优化针对ABS系统性能的试验方法,通过一系列不同道路附着系数、不同车辆行驶速度及车辆负荷的工况下,做了相关道路试验,以验证ABS系统的性能,并根据对车辆制动减速度和车轮转速的监测结果,验证试验方法的规范性,提出了增加车辆横摆角度和横摆角速度以评价车辆制动性能的建议。 相似文献
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计算机仿真汽车ABS性能评价方法 总被引:2,自引:0,他引:2
采用计算机仿真方法实现了对汽车ABS制动过程的模拟仿真,开发了一套ABS性能评价系统。该系统具有图形与数字显示功能,能直观地反映汽车ABS性能,可以迅速地显示车辆参数和道路参数对ABS性能的影响。在基于计算机仿真的基础上提出了反映ABS性能的7大评价指标:附着系数利用率、附着系数利用率均方差、滑移率均值、滑移率均方差、稳定系数、制动压力均值、制动压力均方差,综合利用这些指标可以较好的评价计算机仿真下的汽车ABS的基本性能。 相似文献
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汽车防抱死制动系统试验研究 总被引:1,自引:0,他引:1
首先对ABS的作用做了较详细的介绍,然后重点对ABS试验方法和评价方法做了较详细的论述。本文对ABS的性能评价是以装车后进行实车道路试验的方式进行的,在评价方法方面,文章提出了利用多个参数来对ABS系统进行综合评价,该理论不仅适用于ABS产品的认证,更适用于ABS产品的研究及开发。 相似文献
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ABS是英文ANTILOCK BRAKE SYSTEM的缩写,即防抱死制动系统。ABS系统能极大地改善和提高车辆的制动性能,它能够在制动过程中对被制动车轮的制动压力进行自适应调节,防止制动车轮发生抱死,是提高车辆主动安全性的重要装备。本文在介绍防抱死制动系统(ABS)的结构和工作原理的基础上,重点结合VBOX设备和MT500/e KFZ轮速传感器介绍某轻型客车的ABS试验流程,同时对试验结果进行比较和分析,得出该车辆的防抱死制动性能的综合评价。 相似文献
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有效、快速的道路状况自动识别对于提高ABS性能具有重要意义。通过仿真试验分析,提出了一种比传统方法更快更高效的路面识别方法,并设计了以滑移率为控制目标的ABS模糊神经网络控制器。结合车辆模型熏对单一附着系数路面和变附着系数路面进行了ABS制动模拟试验。结果表明熏基于路面自动识别ABS模糊控制系统能快速、准确判断出路面状况的变化熏自动调整、优化控制器控制参数熏使车辆获得最大地面制动力,与传统利用车身加速度进行路面识别的逻辑门限控制器相比,该控制器反应更灵敏,控制更精确。 相似文献
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道路运输车辆达标车型的实施,有效提升了道路运输车辆的安全性能。文章主要从电子稳定性控制系统、车道偏离预警系统、前向碰撞预警系统、自动紧急制动系统四个整车主动安全测试项目对道路运输车辆达标车型相应标准进行介绍,为道路运输车辆达标车型相关从业人员提供了主动安全整车项目试验参考。 相似文献
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汽车的制动性能关系剑汽车安全行驶性能。ABS防抱死系统的应用是汽车安全性方面最重要的技术进展。通过对装备ABS汽车与普通汽车制动距离的计算比较分析发现,在湿滑的道路上突然制动,ABS系统可以使驾驶员能够保持车辆行驶平稳,在较短的距离内将汽车刹住。但在不湿滑的路面上,缩短刹车距离的范同值比较小。而在冰雪路面上行驶的车辆,没有装备ABS的汽车在湿路面或冻路面上制动时,制动距离会过长且不能猛烈转向。而装备ABS系统的汽车也是如此,因为尽管ABS能提供附加的制动控制和转向控制,但它不能解决这样一个客观的物理事实:那就是在较滑的路面上,可利用的牵引力很小。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):475-503
A sliding-mode observer is designed to estimate the vehicle velocity with the measured vehicle acceleration, the wheel speeds and the braking torques. Based on the Burckhardt tyre model, the extended Kalman filter is designed to estimate the parameters of the Burckhardt model with the estimated vehicle velocity, the measured wheel speeds and the vehicle acceleration. According to the estimated parameters of the Burckhardt tyre model, the tyre/road friction coefficients and the optimal slip ratios are calculated. A vehicle adaptive sliding-mode control (SMC) algorithm is presented with the estimated vehicle velocity, the tyre/road friction coefficients and the optimal slip ratios. And the adjustment method of the sliding-mode gain factors is discussed. Based on the adaptive SMC algorithm, a vehicle's antilock braking system (ABS) control system model is built with the Simulink Toolbox. Under the single-road condition as well as the different road conditions, the performance of the vehicle ABS system is simulated with the vehicle velocity observer, the tyre/road friction coefficient estimator and the adaptive SMC algorithm. The results indicate that the estimated errors of the vehicle velocity and the tyre/road friction coefficients are acceptable and the vehicle ABS adaptive SMC algorithm is effective. So the proposed adaptive SMC algorithm can be used to control the vehicle ABS without the information of the vehicle velocity and the road conditions. 相似文献
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Xiangmo Zhao Ruru Hao Zhou Zhou Amira Ashour Nilanjan Dey 《International Journal of Automotive Technology》2018,19(5):825-836
Bench inspection approach for automobile Anti-lock Braking System (ABS) has gained research interests recently due to its high efficiency, small site occupation and insusceptibility to environment influences. The current work proposed a novel systematic bench inspection approach for ABS. In order to dynamically simulate various road adhesion coefficients, torque controllers are used for loading different torques to the drums. Furthermore, flywheels are adopted to simulate the translational inertia of the vehicle braking on road for compensating the inertial energy of ABS road experiment on the bench. The principal component analysis (PCA) is applied for accurate and efficient data analysis. The automatic evaluation of ABS is achieved by using the processed PCA data as an input to the back-propagation (BP) neural network classifier. The experiments established that the new approach can accurately simulate various road braking conditions. It can be carried out for the inspection of ABS installed in the car. 相似文献
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Yue Shi Bin Li Jiannan Luo 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(3):336-368
Emergency brake technologies have always been a major interest of vehicle active safety-related studies. On homogeneous surfaces, traditional anti-lock brake system (ABS) can achieve efficient braking performance and maintain the handling capability as well. However, when road conditions are time variant during the braking process, or different at the bilateral wheels, braking stability performance is likely to be degraded. To address this problem and enhance ABS performances, a practical identifier of road variations is developed in this study. The proposed identifier adopts a statechart-based approach and is hierarchically constructed with a wheel layer and a full vehicle layer identifier. Based on the identification results, modifications are made to a four-phase wheel-behaviour-based ABS controller to enhance its performance. The feasibility and effectiveness of the proposed identifier in collaborating with the modified ABS controller are examined via simulations and further validated by track tests under various practical braking scenarios. 相似文献
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