We need to add the controller in order to enhance the control precision and response speed of DVD focus servo system, and then a new emendation arithmetic was put forward.
为了提高DVD聚焦伺服系统的控制精度和响应速度需要加入控制器，提出了一种新的校正算法。
Backstepping control called a novel nonlinear strategy is one of the high focus research in ac servo drive for simple arithmetic and facility project implementation.
反推控制是一种新颖的非线性控制策略，算法简单，易于工程实现，是目前交流伺服控制研究热点之一。
The paper mainly focus on the experimental research on pneumatic on-off valve motor position servo control system with PCM control method and self-adjusting PID algorithm.
文章主要研究的内容为利用PCM控制技术，采用自适应PID控制算法，对开关阀式气动马达位置伺服系统进行实验研究。
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