Proficient in PLC programming (Siemens), human-machine interface touch screen, frequency converter, servo driver, stepper motor.

精通PLC编程（西门子、三菱），人机接口触摸屏、变频器、伺服驱动器、步进电机。

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What we can see here is the metal sheet, this time connected to a sound driver, and being fed by a frequency generator.

在这里所看到的是金属板，这次是连接到一个声音驱动装置，由频率产生器送出振动。

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The system bandwidth of conventional voltage-control-mode motor driver circuits is limited by the intrinsic frequency of the load, and its phase lag is also load-dependent.

传统电压控制模式的电机驱动电路系统频率都受电机的本征频率制约，其相位延迟会随负载的变化而变化。

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When iTrip Auto is connected to an iPhone or iPod touch, Aha detects and launches its Griffin iTrip-specific settings to help the driver find an unused FM frequency on which to stream their Aha stations.

ENGADGET: Griffin adds Aha by Harman to its iTrip Auto in-car FM transmitter

Furthermore, the LightSpeaker's 2.5-inch wide dispersion driver uses digital signal processing to optimize high- and low-frequency output for a full spectrum of sound.

ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)