该文以同步旋转坐标系模型为基础，设计了三相电压型PWM整流器的级联式非线性PI控制器。
This paper proposes a cascaded nonlinear PI controller for three-phase voltage source PWM rectifier, which is based on its model in synchronous reference frame.
忽略作物生长高度，建立了单目视觉条件下，从图像坐标系到作物生长平面坐标系的转换模型。
The translation model between image and crop row coordinate under monocular vision was set up, ignored the height of row crop.
在交通参数信息采集过程中，需要在实际道路坐标系和图像坐标系之间建立一个视觉模型。
In the course of measuring the traffic parameters, a vision model between the road coordinate and image coordinate is needed.
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