The model of voice coil motor and optical pickup unit are analyzed, the model parameters are tested, the model of DVD focus servo system is built and the simulation is carried out.

分析了DVD聚焦伺服系统中音圈电机和光头拾取器的数学模型，通过实验测定其模型参数，完成了DVD聚焦伺服系统的建模，并进行了仿真。

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Several hours after the scheduled time of pickup, the CIA field unit received a message from the agent team, reporting that the snatch had been successful.

在预定接人时间过去了几个小时之后，中情局的外勤部门收到了小分队发回的消息，报告说接人行动已取得成功。

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The electronic control unit allows current to flow through the ignition coil primary winding until it senses a triggering voltage pulse from the speed sensor, or pickup coil.

电子控制单元使电流通过初级绕组直到感知到一个从转速传感器或拾波线圈产生的触发电压脉冲。

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That explosion shattered glass on several storefronts and left the stricken police unit's modified Ford pickup truck charred and mangled.

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Analysts point out that the company is not particularly competitive in the pickup and SUV markets, which are still important high margin vehicles even with unit volumes well below the peaks of a few years ago.

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