MODELING AND SIMULATION OF ELASTIC AND FRICTION FORCES IN LUBRICATED BEARINGS FOR PRECISE MOTION CONTROL
MODELING AND SIMULATION OF ELASTIC AND FRICTION FORCES IN LUBRICATED BEARINGS FOR PRECISE MOTION CONTROL
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DOI：
10.1016/0043-1648(94)90283-6
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发表时间：
1994-03-01
期刊：
影响因子：
5
通讯作者：
RACHOOR, H
中科院分区：
文献类型：
--
作者：
HARNOY, A;FRIEDLAND, B;RACHOOR, H
建立了滑动轴承在低速时轴颈转动阻力的动力学模型。阻力既包括滑动摩擦，也包括预滑Dahl效应，即在滑动开始时，在力达到脱离量级之前，系统中柔度所产生的弹性力。轴颈的预滑转既考虑了表面粗糙度的刚度，又考虑了轴承的弹性支承。该模型基于流体动力润滑的物理原理和系统的动力学，表明瞬时摩擦力不仅是该时刻速度的函数，而且与速度历史有关。该模型预测了摆动速度的滞后型摩擦曲线，与以前的实验结果一致。该模型对提高有摩擦反馈控制系统的运动精度有一定的参考价值。
The study presents a dynamic model for the resistance forces to the rotation of a journal in a lubricated sleeve bearing at low speed. The resistance forces include the sliding friction as well as the presliding Dahl effect, namely, elastic force due to the compliance in the system before the force reaches the break-away magnitude when sliding initiates. Both the stiffness of the surface asperities and the elastic support of the bearing are considered for the presliding rotation of the journal. The model is based on the physical principles of hydrodynamic lubrication as well as the dynamics of the system.The model shows that the instantaneous friction is not only a function of the velocity at that instant, but also depends on the velocity history. The model predicts hysteresis-type friction curves for oscillating velocity, in agreement with previous experiments. The model may be useful to improve the precision of motion in feedback control systems with friction.