In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.

本文以三牙轮钻头的台架试验和油气田现场试验的效果为依据，探讨三牙轮钻头的改进方向。

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This paper introduces a new fuzzy PID controller which can be used in the automotive engine test bench, the advantage of this PID cont roller lies in the online self-tuning function of PID parameter.

本文提出了一种应用于汽车发动机测试台架的模糊pid控制器，这种PID控制器优点在于PID参数可在线自整定。

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Bench test shows that the double row short roller bearing works flexibly and normally and meets the basic performance requirement.

台架试验表明，该双列偏心短圆柱轴承运转灵活正常，达到了设计基本性能要求。

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