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G. Roos R. Rollet R.F.C. Kriens 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1997,27(4):267-283
Numerical design of vehicles having optimal straight line stability on undulating road surfaces requires an accurate vehicle model based on knowledge of the relevant phenomena. Therefore, vehicle behavior on undulating straight roads has been analyzed and modeled. Measurements on a flat road surface have shown that the dedicated vehicle model yields accurate simulation results of the steering response to medium steering wheel angle inputs. In addition, the model has been validated by measuring two vehicle responses during normal driving on an undulating straight road: viz. the responses to the small steering wheel angle input and to the input by the global inclination of the road surface. 相似文献
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Jung-Hwan Lee 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2000,33(6):373-390
In the dynamic simulation of vehicle straight line motion, a vehicle model usually drifts from its intended straight path even in the case of no external input. This is particularly true when a tire model based on experimental data is used. The purpose of this paper is to provide an enhancement of a basic understanding of a tire/vehicle system behavior in the straight line motion and to identify the effect of the tire on that motion. Through the analysis of a two degrees of freedom vehicle model, tire characteristic which causes a lateral drift in the straight line motion is identified. Then the results are confirmed from vehicle test and the simulations with a more complex full-car model. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(6):373-390
In the dynamic simulation of vehicle straight line motion, a vehicle model usually drifts from its intended straight path even in the case of no external input. This is particularly true when a tire model based on experimental data is used. The purpose of this paper is to provide an enhancement of a basic understanding of a tire/vehicle system behavior in the straight line motion and to identify the effect of the tire on that motion. Through the analysis of a two degrees of freedom vehicle model, tire characteristic which causes a lateral drift in the straight line motion is identified. Then the results are confirmed from vehicle test and the simulations with a more complex full-car model. 相似文献
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汽车道路模拟算法研究 总被引:9,自引:0,他引:9
研究了道路模拟算法的两个关键问题:频响函数识别算法和驱动信号迭代算法。识别频响函数时,引入了多点激振试验方法和多输入多输出Hv频响函数识别算法,克服了单点轮流激振试验技术和H1、H2等识别方法的缺点,可以提高识别精度,加快试验进程。为了消除非线性的影响,采用频域迭代的方法逐步修正驱动信号,使系统的响应逼近于期望响应信号。试验表明,利用所研究的算法可以成功地模拟一辆轿车在海南试验场的实际行驶工况,迭代收敛速度和模拟精度可以满足试验要求。证明本文所研究的算法是正确的,实用的。 相似文献
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汽车薄壁直梁抗弯曲特性的仿真研究 总被引:1,自引:0,他引:1
针对汽车前纵梁在斜向碰撞中出现的抗弯能力不足,在刚性墙极限倾角下发生欧拉变形的问题,利用HyperMesh软件建立了薄壁梁斜向碰撞有限元模型,LS-DYNA求解。分别分析了梁长度/截面宽,高、接触面摩擦系数、壁厚对梁抗弯能力的影响。从中得出了一些提高薄壁梁抗弯能力的有意义的方法。 相似文献
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整车道路模拟试验RPC技术应用 总被引:1,自引:0,他引:1
试验室整车道路模拟试验是汽车可靠性、耐久性试验的主流。道路模拟试验技术是在随机过程理论和自动控制技术基础上发展起来的汽车试验新技术。远程参数控制(RPC)、PID控制是道路模拟试验系统控制理论基础。结合CIMC整车试验室建设,重点介绍整车道路模拟试验系统控制系统构成、控制技术、工作原理及应用。 相似文献
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为改善汽车的除霜性能,文章应用STARCCM+软件对汽车除霜风道进行了数值模拟计算,在稳态流场计算的基础上找出了当前风道存在主管两侧壁与水平面夹角大、出口有直角涡流区及格栅角度未起到分风作用3个问题.针对上述问题对风道进行逐步优化,得到前风挡气流分布均匀的风道模型.在全部计算域进行除霜瞬态计算,得到不同方案的最终除霜效果.计算结果表明,最优方案较原方案除霜率提高了6.27%. 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... 相似文献