共查询到18条相似文献,搜索用时 734 毫秒
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汽车ABS液压调节器是ABS的执行机构,它的性能好坏直接影响着汽车制动效能。为研究和评价ABS液压调节器性能,文章在分析调节器的组成和工作原理的基础上,基于AMESim建立了包括液压调节器、制动主缸及制动轮缸的模型,对影响调节器动态响应特性的制动液和控制阀(增、减压阀)结构因素进行了仿真分析;并针对某型号调节器进行了台架试验。试验结果表明,基于AMESim的汽车ABS液压调节器仿真结果与试验结果基本吻合。AMESim建模为调节器的研究提供了一种行之有效的方法。 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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汽车防抱死制动系统(ABS)是一种非常重要的主动安全装置,控制软件是其核心部分。基于Intel16位单片机对ABS控制软件加以设计,给出了各子系统的详细流程图,并利用MATLAB/Simulink对控制软件进行了仿真,得到了较为理想的仿真结果。最终将控制软件写入已有的ABS控制器内,并在单车轮制动试验台上多次进行了相关试验,得到了较为理想的实验结果。这些都说明了所设计的控制软件具有一定的合理性和可行性。 相似文献
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多功能液压ABS混和仿真试验台设计研究 总被引:1,自引:0,他引:1
为快速开发研究液压ABS系统,设计了多功能液压混和仿真试验台。设计了硬件接口电路、轮速传感器试验台、主动加压设备等硬件;在Simulink中搭建了ABS动力学模型,基于xPC目标环境实现软硬件连接,建立了双机模式的实时仿真系统。该试验台可以完成纯软件模拟、控制器原型实施、硬件在环仿真和参数匹配标定等功能,并能够对ABS所有部件进行研究和测试,具有控制逻辑再现、特殊工况模拟、故障模拟等功能。经试验证明,其能够提高ABS开发效率,缩短开发周期。 相似文献
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首先对ABS控制理论做了较详细的介绍,通过对ABS控制参数和控制方式的论述提出了ABS道路试验的重要性,重点对ABS试验方法、评价方法做了较详细的介绍。在评价方法方面,提出了利用多个参数来对ABS系统综合评价,该方法不仅适用于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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Modeling and Analysis of Automotive Antilock Brake Systems Subject to Vehicle Payload Shifting 总被引:4,自引:0,他引:4
Val Mills Bernard Samuel John Wagner 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2002,37(4):283-310
The steerability and stability of vehicles must be maintained during emergency stopping and evasive driving maneuvers on degraded road surfaces. The introduction of antilock brake and traction control systems (ABS/TCS) has expanded the envelope of safe vehicle operation for the majority of drivers. These mechatronic systems combine an electronic controller with wheel speed sensors, an electro-mechanical hydraulic brake actuator, and in some instances, engine intervention through the engine control unit, to regulate wheel slip. The development of ABS systems has traditionally depended on extensive in-vehicle testing, at cold weather proving grounds, which contribute to lengthy product development cycles. However, recent attention has been focused on the use of simulation and hardware-in-the-loop strategies to emulate test conditions in a controlled setting to shorten product design time and methodically address critical safety issues. In this paper, the effect of transient load shifting due to cargo movement on ABS performance in light-duty vehicles will be investigated. Analytical and empirical mathematical models are presented to describe the chassis, tire/road interface, wheel, brake modulator, and cargo dynamics. Two strategies, a model-free table lookup and model-based discrete nonlinear controller, are presented to regulate the ABS modulator's operation. These vehicle and controller dynamics have been integrated into a simulation tool to investigate the effect of transient weight transfers on the vehicle's overall stopping distance and time. Representative numerical results are presented and discussed to quantify the ABS systems' performance for various loading and operating conditions. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(12):1779-1796
The paper presents an anti-lock braking system (ABS) control logic based on the measurement of the longitudinal forces at the hub bearings. The availability of force information allows to design a logic that does not rely on the estimation of the tyre–road friction coefficient, since it continuously tries to exploit the maximum longitudinal tyre force. The logic is designed by means of computer simulation and then tested on a specific hardware in the loop test bench: the experimental results confirm that measured wheel force can lead to a significant improvement of the ABS performances in terms of stopping distance also in the presence of road with variable friction coefficient. 相似文献
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文章利用trucksim重型汽车动力学仿真软件,对六轮双轴重型汽车在低附着路面左右车轮附着系数不一致情况下进行紧急制动的行驶工况进行了仿真研究。研究结果表明在低附着路面进行紧急制动时,对制动轮进行制动压力控制,有ABS控制的重型汽车比没有ABS控制的重型汽车具有更好地行驶稳定性。但在低附着路面上,有ABS控制的重型汽车比没有ABS控制的重型汽车的制动距离增加了很多,这对重型汽车的行车安全性非常不利。 相似文献