配以单片机、键盘、LED显示器及转速编码器，构成闭环调速系统。经过实际测试，取得了很好的效果。

The speed adjusting system consisting of SCC, KB, LED display and speed coder is tested and excellent performance is achieved.

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标准编码器分辨率为2048转速每行。

The standard encoder resolution is 2048 lines per rev.

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为了满足某些运动系统对转速测量高精度的要求，本文提出了虚拟编码器的设计方法。

In order to satisfy the requirement of high accuracy rotation speed measurement in moving systems, the concept of virtual coder has been put forward.

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