A second order filter is used to smooth the speed reference signal, and the perfect non-overshooting speed tracking is achieved.

采用二阶滤波环节平滑速度指令，实现了理想无超调的快速速度跟踪控制。

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The speed reference for the controller is a function of the wind speed and is chosen to ensure maximum energy capture from the wind for varying wind conditions.

控制器的参考转速是风速的函数，它的选择随风力状况的变化而变化，目的是为了获取最大风能。

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The benchmark rev equipment is designed to provide speed reference for tacho generator's testing, which has high velocity precision, wide speed range and stepless speed adjustment.

高精度转速源是为测速发电机的校准测试提供速度基准的驱动系统，具有转速精度高、调速范围宽及无级平滑调速的特点。

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In what seemed another reference to Mr Cameron, he said that there could not be a two-speed, or a la carte, Europe.

BBC: France takes aim at Britain

Yet high-speed rail has become an ideological issue, supported by Democrats and opposed by Republicans with little reference to the specifics of any given project.

ECONOMIST: Don��t sell your car just yet