伺服

There were many schemes that have been applied to these system to minimize the contouring error, but the effects of these scheme are usually undesire. A repetitive control algorithm was applied here to improve the precision of the system. Experimental results indicated that the periodic error decreased 90% by using the repetitive control method.

另外我们也针对系统的最重要指标—精度—的控制，比较传统伺服控制与往覆式控制理论，在整体系统的要求下整合的可行性并进行相关的实验，而由实验验证往覆式控制理论针对周期性误差信号所具有的特殊补偿现象，并由此得到往覆式控制器的基本特性。

A rain forest and a periwinkle, an electronic network and a servomechanism, SimCity and New York City, all possess degrees of hyperlife. Hyperlife is my word for that class of life that includes both the AIDS virus and the Michelangelo computer virus.

一个热带雨林和一枝长春花，一个电子网络和一个伺服系统，模拟城市和纽约城，都控制着hyperlife的程度。hyperlife是我为包括区滋病毒和米开朗基罗计算机病毒在内的生命等级准备的词汇。

The paper mainly discusses the studies and designs of sewing machine servo control system based permanent magnet synchronous motor.

本文主要讨论的是基于交流永磁同步电机的缝纫机伺服控制系统的研究和设计。

At present, permanent magnet synchronous motor servo system has gainedgeneral regard all around the world.

目前，永磁同步电机伺服系统已受到国内外的普遍重视。

A method of permanent magnet synchronous motor ac servo system with variable structure acceleration control is proposed.

本文提出了一种交流永磁同步电机伺服系统的变结构加速度控制法。

This paper introduces a digital servo control system for permanent magnet synchronous motor.

介绍了一种高性能的以永磁同步电动机为执行元件的全数字化伺服驱动器。

Simulation results show that the servo system with the designed controllers provides a good performance. At the same time, it reduces the sensitivity of the system performance to the controller parameter perturbation. Then, the robustness of the system are improved.

仿真实验结果表明，采用本文方法设计的鲁棒二自由度控制器性能很好，不但保证了伺服系统的动静态性能，而且降低了系统对控制器参数摄动的灵敏度，提高了系统的整体鲁棒性能。

Secondly, to increase the replication accuracy of every servo axis and to combine with the feature that the machining contour is known in advance, a limited bandwidth zero phase lag desired model is presented in this dissertation.

本文首先综述了国内外超精密机床及其各种伺服控制策略的发展概况，并对数控系统的发展和研究现状进行了比较全面的总结。

The current photoelectric servo gauge-alignment system is replaced by laser video camera gauge-alignment system.

以激光摄像式轨距-轨向系统替换现有的光电伺服式轨距-轨向系统。

A blend closed loop control system is introduced,which is constituted with microcontroller,photoelectric coder,direct current servo electromotor and direct current servo electromotor drivers.

本设计要求对某火炮的水平和高低角进行控制，达到快速位置伺服系统的要求。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。