共查询到19条相似文献,搜索用时 265 毫秒
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电动助力转向中间位置转向感觉分析 总被引:1,自引:1,他引:0
针对电动助力转向系统(EPS)的转向感觉进行了系统分析,其中转向盘中间位置的转向主观感受是汽车转向感觉研究的主要内容,直接影响驾驶员对稳定性、安全性和行驶的判断,研究通过整车中间位置转向感觉主观评价试验,介绍了试验及数据处理方法,并对客观评价指标进行了分析.分别研究了中间位置转向灵敏程度,转向手力特性,以及中间位置行驶时的汽车响应特性等三方面的客观评价指标.应用这些指标参数,可以系统全面的评定EPS中间位置转向感觉,指导EPS与整车的匹配开发,以获得更适宜的中间位置转向感觉. 相似文献
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电动转向系统开发与研究 总被引:2,自引:0,他引:2
南京汽车集团有限公司与清华大学汽车工程系合作开发了新型的电动助力转向系统,该产品已经进行了整车试验,取得了良好的效果。本文主要介绍了电动转向的原理、电动转向的关键技术、电动转向的特点,并对电动转向的发展作了一些简单的预测。 相似文献
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电子控制电动助力转向系统的研究与发展 总被引:1,自引:0,他引:1
本文简要介绍了汽车转向系统的发展历程,重点讨论一种新型的转向系统一电子控制电动助力转向系统(EPS),并同传统的转向系统进行了对比,分析了电动助力转向系统的特性,阐述了电动助力转向系统的基本结构、工作原理和评价指标,指出了电动助力转向系统今后的发展方向和趋势。 相似文献
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电动助力转向系统助力特性的仿真分析 总被引:1,自引:0,他引:1
首先利用ADAMS软件建立了分析电动助力转向系统的整车动力学仿真模型,然后系统分析了助力特性曲线的特征形式对转向轻便性和路感的影响。这种研究方法能缩短产品的开发周期、节约试验经费。 相似文献
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在电动助力转向系统(EPS)的数学模型和整车八自由度模型基础上,建立了基于Matlab/Simulink的电动助力转向系统仿真模型。基于扭矩输入对电动助力转向系统应用PID进行助力控制。仿真结果表明,所设计的电动助力转向系统在改善转向轻便型和路感的同时,具有很好的抗干扰性能,能提高汽车行驶的操纵稳定性和安全性。 相似文献
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助力性能是评价汽车电动助力转向系统性能的重要指标,助力性能直接关系到汽车转向操作的安全性。以电动助力转向系统的跟踪性能和稳定性为控制系统设计目标,将经典控制理论的PID控制与虚拟样机技术相结合应用于电动助力转向控制系统的设计,创建了电动助力转向系统机电一体化仿真模型。计算机仿真结果证实.所设计的PID控制算法使电动助力转向系统具有良好的跟踪性能和稳定性,仿真结果为电动助力转向控制系统的设计提供了依据。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):781-805
The article reports an experimental study of driver steering control behaviour in a lane-change manoeuvre. Eight test subjects were instrumented with electromyography to measure muscle activation and co-contraction. Each subject completed 30 lane-change manoeuvres with one vehicle on a fixed-base driving simulator. For each driver, the steering torque feedback characteristic was changed after every ten manoeuvres; the response of the vehicle to steering angle inputs was not changed. Drivers' control strategies were found to be robust to changes in steering torque feedback. Path-following errors, muscle activity and muscle co-contraction all reduce with the number of lane-changes performed by the driver, suggesting the existence of a learning process. Comparing the test subjects, there was some evidence that high levels of co-contraction were used to allow high-frequency steering inputs to be generated. The results contribute to the understanding of vehicle–driver (and more generally, human–machine) dynamic interaction. 相似文献
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介绍燃料电池汽车转向系统的要求与特点,综述现有适合燃料电池汽车的电动液压助力转向系统、电动助力转向系统技术及未来线控转向系统技术,分析各自的特点,并阐述了燃料电池汽车转向系统的应用与发展趋势。 相似文献
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为了研究电动汽车EPS助力特性对汽车操纵稳定性的影响,在对EPS工作原理和助力特性进行分析的基础上,建立了EPS动力学方程,设计了一种能实现理想助力特性的PID控制器。基于MATLAB/SIMULINK对其进行了仿真分析,结果表明,系统加入PID控制后齿条位移、方向盘转角及检测转矩相比无控制时运行更平稳,调节时间分别缩短0.2,0.4,0.4 s;前助力转矩阶跃响应呈高频波动,电机内部的波动现象明显改善,PID控制器对于EPS的助力特性具有更好的控制效果和稳定性。 相似文献
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Andrew J. Pick David J. Cole 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(9):781-805
The article reports an experimental study of driver steering control behaviour in a lane-change manoeuvre. Eight test subjects were instrumented with electromyography to measure muscle activation and co-contraction. Each subject completed 30 lane-change manoeuvres with one vehicle on a fixed-base driving simulator. For each driver, the steering torque feedback characteristic was changed after every ten manoeuvres; the response of the vehicle to steering angle inputs was not changed. Drivers' control strategies were found to be robust to changes in steering torque feedback. Path-following errors, muscle activity and muscle co-contraction all reduce with the number of lane-changes performed by the driver, suggesting the existence of a learning process. Comparing the test subjects, there was some evidence that high levels of co-contraction were used to allow high-frequency steering inputs to be generated. The results contribute to the understanding of vehicle-driver (and more generally, human-machine) dynamic interaction. 相似文献
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H. S. Wi Y. K. Lee J. I. Park J. H. Lee K. S. Park 《International Journal of Automotive Technology》2009,10(6):771-776
This paper focuses on fuel economy improvement according to the type of power steering system. Usually, a conventional power
steering system is directly driven by the crankshaft of the engine with a belt, known as HPS (hydraulic power steering). However,
there is some inefficiency with this system at high engine speeds. To improve this inefficiency, automobile makers have developed
two power steering systems: EHPS (electro-hydraulic power steering) and MDPS (motor-driven power steering) or EPS (electric
powered steering). However, there has been insufficient study of effects of the type of power steering system on fuel economy.
In this paper, the effect of the type of power steering system on fuel economy is studied experimentally, and calculations
of the effect on vehicle fuel economy are presenting using computer simulation with AVL cruise software. The results demonstrate
that a 1% vehicle fuel economy improvement can be achieved in a vehicle with an electro-hydraulic power steering system compared
to a vehicle with a hydraulic power steering system. In addition, a 1.7% vehicle fuel economy improvement can be achieved
using a full electric power steering system in a FTP-75 driving cycle. These results could be used to choose a power steering
system. 相似文献
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Naohiro Yuhara Jun Tajima 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2001,36(2):119-158
This paper proposes an advanced steering system that adaptively varies the static gain and dynamics of the steering system. The steering system gain is adjusted, depending on whether the driver is in an aggressive or leisurely driving mood. The steering system dynamics is so designed that the command mode of the steering system will be either a rate-command or an attitude-command according to the lateral control task performed by the driver. The recognition system for lateral control tasks, a lane-following or lane-change task is proposed. The findings of simulator tests indicate proposed advanced steering system would remarkably improve the vehicle handling qualities. 相似文献