Besides, the position tracking control of USM for triangle and sinusoid is studied by means of P-control.

采用比例控制算法研究行波超声波电机对三角波、正弦波曲线的快速位置轨迹控制。

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Select the Pen Tool (P) and create a black triangle like the one from the following image.

选择钢笔工具(P)，创建一个黑色三角形，就像下图一样。

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Select the Pen Tool (P) and create a black triangle like the one from the following image.

选择钢笔工具(P)，创建一个黑色三角形，就像下图一样。

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