共查询到17条相似文献,搜索用时 812 毫秒
1.
本文介绍了自行开发的液压ABS系统。采用全新的开发手段与思想,建立快速开发系统,使得从概念到产品的开发周期大大缩短,并保证产品性能的可靠性,试验对比表明,该产品性能巳达到国外同类产品的水平。 相似文献
2.
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
3.
4.
5.
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
6.
7.
8.
随着汽车工业的不断发展,安全性日益成为人们选购汽车的重要标准。而为了迎合和满足消费者对安全性能方面的要求,厂商们也是不遗余力地强化着产品的安全性能,SABS、ABS等各种各样的安全装置概念层出不穷。一些SUV厂商在宣传产品的安全性能时,往往将SABS作为一项重要的安全设备推荐给消费者,并用各种美妙的语言予以修饰,让消费者建立起SABS技术先进、安全效果好的认识,以便于产品更好地销售。久而久之,当配备了ABS的产品推出之时,一些消费者便想当然地认为ABS比SABS要差, 相似文献
9.
10.
在汽车防抱死制动系统(ABS)开发过程中,需要通过大量的实车试验完成参数标定以保证产品性能和鲁棒性。对于缩短开发周期而言,在设计阶段基于模型实现ABS控制算法的标定和迭代优化具有重要价值。本文建立了包含平面内SWIFT轮胎模型在内的四分之一车辆模型,建立了防抱死制动系统模型并设计了基于规则的逻辑门限ABS控制算法,并基于该平台验证了ABS控制算法的合理性。 相似文献
11.
滑模控制方法在汽车防抱制动系统中的应用研究 总被引:1,自引:0,他引:1
ABS性能优劣的关键在于控制方法的选取,提出了一种基于ABS滑移率控制的滑模变结构控制方法。该方法通过选定合适的切换甬数和控制规律,可以迫使系统沿设计的滑移面做滑模运动。从而使防抱制动系统的滑动模态对系统的动理学变化、参数变化、外部干扰具有很强的鲁棒性和自适应性。将这一控制方法应用于单轮车辆模型,在MATLAB/Simulink环境下进行仿真。仿真结果表明,滑模控制方法在ABS的滑移率控制中是切实有效的,能够明显提高汽车ABS的性能。 相似文献
12.
13.
14.
15.
ABS(汽车防抱死制动系统)能极大地改善和提高制动性能,是提高车辆主动安全性的重要途径。本文在对ABS技术作精简介绍的基础上,重点论述ABS技术的应用发展,主要包括ABS中的关键技术、有待改进的问题和未来的发展趋势等。 相似文献
16.
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
17.
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