滞回控制环节与IGBT的驱动环节是本文中的核心部分，它们的工作状况将直接影响到本装置以何种效率追踪标准波形。
Hysteresis current control and drive of IGBT are key sections of the study, and their performances will directly decide the efficiency of tracing the standard waveform.
单个标准模块主要由中间通孔式连接手臂、履带驱动链传动装置、模块偏转锥齿轮传动装置、模块俯仰链传动装置、连接柄等组成。
A standard such module is mainly composed of the link arm, the link handle, the track driven system, the offset pitch joint, the offset yaw joint and so on.
纳米级尺度实物标准是纳米尺寸传递体系中的关键环节，也是评价和校正压电驱动等微扫描微定位装置的重要工具。
Nanometer scale step standards are the keys for dimension transfer, and they are the important tools to evaluate and calibrate micro actuator and micro position devices such as piezoelectric scanner.
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