Acquired current signal were inverse feed backed with PWM, then, output of the chip SG3525 were controlled through PI regulator. As a result, the external characteristic was controlled.
采用脉宽调制型控制方法，对采集到的电流信号进行负反馈，通过PI调节控制脉宽调制专用芯片sg3525的输出，以达到控制焊机外特性的目的。
A filter bank is adopted to compose the approximate inverse system, which is the feed-forward controller in the composite control strategy.
在控制器实现中，提出了以滤波器组构建近似逆系统的方法。
SVM based inverse model of nonlinear system is used as feed-forward controller to form direct inverse model controller.
由SVM辨识的逆模型作为前馈控制器，形成直接逆模型控制器。
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