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介绍了液压传动的类型,重点对液压无级变速传动系统的工作原理做了详细的分析,对匹配设计过程做了详细的推导.利用MATLAB/Simulink软件建立了液压无级变速系统的仿真模型.在此模型中对变量泵、变量马达的排量匹配进行了优化,使行走速度和驱动力的发挥达到最佳状态,并将仿真结果应用在轮式挖掘机行走系统的设计中.经样机测试完全满足设计要求,取得了较好的结果. 相似文献
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总结汽车传动系相关NVH问题的难点,典型振动、噪声现象的特征及产生机理和国内外研究进展,介绍传动系噪声、振动与声振粗糙度(Noise, vibration and harshness, NVH)动力学问题的主要研究内容及路线。从仿真和试验的角度展开论述:在仿真研究中,详细分析系统动力学、多体动力学、结构动力学模型及系统、结构动力学混合模型的四种传动系力学模型及其各自的特点,总结建模所使用的坐标与坐标系,并针对传动系NVH问题的动力学研究,从定量与定性两个方面总结主要的仿真研究方法;在试验研究中,介绍试验研究的主要内容、数据处理的方法及试验的主、客观评价方法。 相似文献
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The launch shudder phenomenon induced by self-excited vibration of driveline was studied with a compact car equipped with AMT as research object. The research showed that self-excited vibration was closely related with damping of driveline,the variation of friction coefficient,equivalent radius of friction plate and applied force of pressure plate. Six DOFs torsional vibration model of vehicle driveline was established according to the parameters of the certain compact car. The simulation was carried out and the result was compared with test data. It was found that the negative slope of friction coefficient with relative slip speed does not necessarily lead to self-excited vibration and the frequency of self-excited vibration on 1 st gear is near to the 1 st order of torsional natural frequency.The influence of each viscous damping in driveline on self-excited vibration was analyzed by simulation and the results showed that increasing the torsional dampings of half-axles and tires properly was effective to improve launch shudder phenomenon. 相似文献
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