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。
2
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。
3
Then a new controller named proportional resonant (pr) controller was introduced in the current control. It could track the current reference without steady error.