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底盘测功机的类型及其选用 总被引:1,自引:0,他引:1
底盘测功机是一种不解体检测汽车各种性能的检测设备。汽车驱动轮在滚筒上转动,加载装置模拟汽车道路行驶工况的阻力,通过测量车速、时间和加载力,可进行汽车动力性、废气排放、燃料经济性和底盘传动系技术状况等检测。它已成为我国汽车综合性能检测站不可缺少的重要设备之一,随着汽车环保要求的提高,在I/M制度实施中也将成为必备设备。 相似文献
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汽车车速传感器测试系统的开发 总被引:3,自引:0,他引:3
车速传感器是监测发动机工况的重要部件,对车速传感器的特性加以测试是非常必要的。介绍了针对霍尔车速传感器而研制和开发的汽车车速传感器测试系统。 相似文献
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汽车制动过程中参考车速计算方法的研究 总被引:2,自引:0,他引:2
本文针对汽车制动防抱死装置ABS所需的汽车制动过程中参考车速的计算方法,提出了一种数值解法,通过对车轮制动过程的分析,建立其相应的数学模型,用数值分析的方法直接根据车轮转速求解参考车速。 相似文献
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汽车防抱制动系统中,滑移率是主要控制参数,制动时车速是确定滑移率的基础,介绍了一种估取车速的新方法。 相似文献
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霍尔型车速传感器的智能测试系统 总被引:2,自引:0,他引:2
霍尔型车速传感器是现代汽车控制系统的重要部件,对这类传感器的特性加以测试成为测试领域一个重要研究方向,介绍了霍尔型车速传感器及其测试系统的组成,原理和测试方法,并且成功地研制了智能车速传感器测试系统。 相似文献
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介绍了一种基于TMS320F2812 DSP信号处理器的汽车安全提示装置的设计与实现,该装置能通过TMS320F2812 DSP信号处理器实时接收所驾驶汽车的车速,当车速达到20km/h时,它会控制执行机构反锁车门,防止车速过高导致意外发生,另外当驾驶员或是乘客在下车开启车门时,该装置还能控制语音芯片进行安全报警提示,防止由于没有按照正确下车的方法下车而发生交通事故。该装置工作相对稳定可靠,能快速准确进行安全提示,使驾驶员,特别是新手能安全驾驶车辆,减少交通事故的发生。 相似文献
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沃尔沃S90、V90汽车巡航控制系统由巡航控制开关、制动开关、巡航控制单元、真空泵和调节器、真空伺服装置等组成。巡航控制单元的主要功能是根据接收到的来自各传感器和开关的信号,控制巡航系统的真空伺服装置,使汽车按照设定的车速定速行驶。只有当车速超过35km/h时才能设定巡航行驶,当车速低于设定车速的75%时,巡航行驶将自动取消。 相似文献
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发展节能与新能源汽车是减少汽车燃料消耗量,缓解燃油供求矛盾,促进汽车产业技术进步和优化升级的重要举措。新能源汽车的发展是大势所趋,而液化天然气(LNG)汽车、混合动力汽车(HEV)和纯电动汽车(PEV)必将是新能源汽车里最耀眼的三颗明星。本文主要介绍了这三种新能源汽车的发展现状并对其发展前景进行了研究。 相似文献
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D. Garcia-Pozuelo V. Diaz M. J. L. Boada 《International Journal of Automotive Technology》2014,15(4):553-564
Most of the tyre models have been developed for high speed, combined forces, etc., however, in certain tests it is necessary to know tyre behaviour at very low speed in order to evaluate different systems. So, during vehicle inspection and maintenance of the steering and brake system, by means of sideslip tester and roller brake tester respectively, the forces transmitted by the tyres are measured; all of these inspections are carried out at low speeds. Furthermore, usually, automobile vehicles run at low speeds during an important part of their operating life (less than 60 km/h), mainly during urban traffic, and in steady state conditions. Therefore, it is particularly interesting to develop an accurate model of the contact patch tyrepavement for low speeds without the complexity of models that cover a wide speed range but provide less precision at very low speeds. The dynamometer plate has proved to be an appropriate test equipment to characterise the tyre-pavement contact at low speed and the steering geometry and wheel alignment. It has the feature of being able to carry out tests with the tyre installed in the vehicle as in completely real conditions. The main aim of this research is to set up a contact model between tyre and pavement at very low speed based on the measurement of longitudinal and lateral forces. A test methodology that allows carrying out the experimental tests in a systematic and controlled way with the dynamometer plate has also been developed. From this model it will be possible to estimate the forces that tyres are capable of transmitting in different situations to act in the parameters which affect these forces and maximize them. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):289-326
A mathematical model for the steering control of an automobile is described. The structure of the model derives from linear optimal discrete time preview control theory but it is non-linear. Its parameter values are obtained by heuristic methods, using insight gained from the linear optimal control theory. The driver model is joined to a vehicle dynamics model and the path tracking performance is demonstrated, using moderate manoeuvring and racing speeds. The model is shown to be capable of excellent path following and to be robust against changes in the vehicle dynamics. Application to the simulation of manoeuvres specified by an ideal vehicle path and further development of the model to formalise the derivation of its parameter values and to put it to other uses are discussed. 相似文献
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A Mathematical Model for Driver Steering Control, with Design, Tuning and Performance Results 总被引:2,自引:0,他引:2
R. S. Sharp D. Casanova P. Symonds 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2000,33(5):289-326
A mathematical model for the steering control of an automobile is described. The structure of the model derives from linear optimal discrete time preview control theory but it is non-linear. Its parameter values are obtained by heuristic methods, using insight gained from the linear optimal control theory. The driver model is joined to a vehicle dynamics model and the path tracking performance is demonstrated, using moderate manoeuvring and racing speeds. The model is shown to be capable of excellent path following and to be robust against changes in the vehicle dynamics. Application to the simulation of manoeuvres specified by an ideal vehicle path and further development of the model to formalise the derivation of its parameter values and to put it to other uses are discussed. 相似文献
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无人驾驶汽车大大提高了交通系统效率和安全性,是未来汽车发展的一个方向。首先介绍了国内外无人驾驶汽车的发展现状,并简单讨论了相关的关键技术,最后阐述了无人驾驶汽车领域的发展方向。 相似文献
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在阐述了国内汽车交通事故和安全现状的基础上,分析了目前车辆被动安全性研究的状况和主要研究方法,并针对我国道路交通的特点.提出我国车辆被动安全性的研究特点和发展趋势。 相似文献