通过应用模糊设计理论和可靠性设计理论，建立了摩擦力作用下直齿圆柱齿轮传动的模糊可靠性优化设计的数学模型，并对其进行优化处理。
In this paper, the fuzzy reliable optimum design's mathematical model of the spur gear under the action of the sliding friction is set up by using the fuzzy and reliable theory.
测量结果表明，在极低速状态下，仪表齿轮齿面间的摩擦系数几乎与齿面间的作用力无关，但随齿面相对滑动速度的增加而线性增加。
Results show that the frictional factor almost has nothing to do with applied forces, but increases linearly with the sliding speed between the tooth faces.
本文在极低速情况下，模拟测定了仪表齿轮在一齿啮合过程中两齿轮齿面间摩擦系数的变化情况。
The friction factor between two tooth surfaces of instrument gears during one meshing process is imitatively measured in this paper under the condition of ultra-low-speed.
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