共查询到17条相似文献,搜索用时 156 毫秒
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针对某轻型载货汽车转向盘异常振动问题,结合轮毂与制动鼓总成动平衡试验进行了分析研究,发现轮毂与制动鼓总成不平衡量超出技术要求是导致样车转向盘异常振动的主要影响因素。通过控制轮毂与制动鼓不平衡量,使样车的转向盘异常振动现象得到了有效控制。总结了解决此类转向盘异常振动问题的步骤,规范了类似转向盘异常振动问题的处理方法。 相似文献
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基于传递路径分析的怠速工况下转向盘振动路径识别及改进 总被引:2,自引:0,他引:2
针对某商用车怠速时转向盘振动问题进行研究,建立了传递路径分析模型.采用试验分析方法,对转向盘振动路径的贡献进行合成,验证了该模型可靠性.基于该模型进行主要贡献路径识别,发现是由于发动机后悬置因激励力大和灵敏度高引起的贡献量大,导致转向盘振动.经改进后悬置横梁,转向盘垂向振动明显减小,取得了良好的减振效果. 相似文献
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为了提升整车操纵稳定性和舒适性,采用理论分析和实车试验相结合的方法探讨了车轮偏心对转向盘摆振的影响。从理论上分析了车轮偏心引起的激振力和车轮动不平衡对转向盘摆振的贡献;以某B级车为研究对象,进行了多个因素的对比试验。结果表明:调整车轮动平衡对转向盘摆振稍有影响,调整下摆臂后衬套也有一定影响,但都不能明显减小振动加速度幅值;调整车轮偏心对转向盘摆振有显著影响,调整车轮偏心后,振动加速度幅值减小了近2倍;车轮偏心比动不平衡对转向盘摆振的影响更大,通过调整车轮安装定位方式消除安装偏心,对转向盘摆振现象的改进效果明显。 相似文献
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<正>转向盘抖振汽车在行驶过程中,尤其速度较快时,底盘出现周期性的响声,转向盘强烈振动。这是由于转向传动装置动平衡被破坏、传动轴及花键轴和花键套磨损过甚引起的。 相似文献
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The brake and steering systems in vehicles are the most effective actuators that directly affect the vehicle dynamics. In general, the brake system affects the longitudinal dynamics and the steering system affects the lateral dynamics; however, their effects are coupled when the vehicle is braking on a non-homogenous surface, such as a split-mu road. The yaw moment compensation of the steering control on a split-mu road is one of the basic functions of integrated or coordinated chassis control systems and has been demonstrated by several chassis suppliers. However, the disturbance yaw moment is generally compensated for using the yaw rate feedback or using wheel brake pressure measurement. Access to the wheel brake pressure through physical sensors is not cost effective; therefore, we modeled the hydraulic brake system to avoid using physical sensors and to estimate the brake pressure. The steering angle controller was designed to mitigate the non-symmetric braking force effect and to stabilize the yaw rate dynamics of the vehicle. An H-infinity design synthesis was used to take the system model and the estimation errors into account, and the designed controller was evaluated using vehicle tests. 相似文献
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J. Sridhar H. Hatwal 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1992,21(1):1-18
An inverse solution study of various four wheel steering models is carried out for the purpose of comparison of steering/braking input needed to track a lane change maneuver. Optimal control is used to solve the non-linear inverse problem. Comparisons are made when the vehicle is coasting, when the time required to track the trajectory is minimized with appropriate utilization of brake/traction forces, and in a front wheel lock situation. A rear steering model which produces neutral steering characteristics displayed the best steering behavior with respect to ease of steering. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):639-656
This paper analyses the dynamic response of a motorcycle with an anti-lock brake system (ABS) and camber or steering angle. Most studies have assumed that motorcycles brake in a straight line – that is, without a steering or camber angle. In this work, the performance of an ABS modulator is designed and analysed at first. Then, a controller is designed for motorcycle turning. The controller uses angular acceleration and the pressure value in brake calipers on the front and rear wheels, camber angle and lateral acceleration as commands to control brake pressure on each wheel to prevent wheel locking. The equation of motion for a motorcycle is based on Weir's equations. This motorcycle model combines a mathematical equation of the ABS modulator, tyre model and controller in simulations. 相似文献