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。
SVM were used to identify the inverse model of nonlinear system, and this inverse model was used as feed-forward controller to design direct inverse control.
由SVM辨识非线性系统的逆模型作为前馈控制器，形成直接逆控制。
The results of test show that this inverse model feed-forward compensator has effectively reduced the non-linear error of the system and has improved the control precision of GMA.
实验结果表明，逆模前馈补偿器有效地减小了系统的非线性误差，提高了执行器的控制精度。
Moreover, PID controller was used to realize feed-back control, which could overcome the limits of direct inverse control in performance and robustness.
同时，由PID控制器构成反馈控制，克服直接逆控制鲁棒性不强的缺陷。
Moreover, PID controller was used to realize feed-back control, which could overcome the limits of direct inverse control in performance and robustness.
同时，由PID控制器构成反馈控制，克服直接逆控制鲁棒性不强的缺陷。
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