In the feedback controller design, a proportional controller is used to regulate the output error of piezoelectric actuators.

在反馈控制器中比例控制器用来调节压电作动器的输出误差。

youdao

The PI observer has two feedback loops, a proportional loop and an integral loop of the estimation error; in this way, the PI observer can estimate not only the states but also the unknown inputs.

该观测器包含有估计误差的比例和积分回路，可同时得到状态和未知输入估计。

youdao

Then a new controller named proportional resonant (pr) controller was introduced in the current control. It could track the current reference without steady error.

在论文并网控制部分中，作者通过使用一种新型比例谐振控制器(PR)实现了对单相逆变器并网电流的无误差控制。

youdao