伺服

On the basis of a general ac drive, the second method doesn't require additional sensors. According to the torque command and the speed performance during the initial state of an ac drive or using a mode selection, the rotor time constant is tuned and identified.

在不增加额外的感测器，建立在一般伺服驱动器下；第二种方法在驱动器起动时或利用模式的选择，根据给予的扭矩命令和所得速度响应关系而判断调整得适当之时间常数。

Servo system is a closed relation to and evidence difference to the common regulation speed system.

伺服系统是一种与普通电动机调速系统有着紧密联系但又明显不同的系统。

The method is beneficial for improving servo system of satellite communication in motion.

为"动中通"伺服系统的改进提供了直接依据。

The BDHI Indicator is used to display Bearing Distance Heading of the aircraft to a designated beacon or desired destination with pointers driven by synchros and with the use of integral lighting, servoed pointers and compass card in connection with TACAN and VOR systems.

该BDHI指示器是用来显示飞机对于一个指定的信标或期望的目的地的定位距离方向，指针由自整角机驱动，具有内置照明，伺服指针和罗盘刻度盘，可与TACAN和VOR (伏尔，甚高频全向无线电信标)系统连接。

The focal point of this research is concentrated on the dynamic properties compensating.

本文研究的重点集中在动态特性补偿技术上，即采取增加补偿环节的办法对电液位置伺服控制系统的总体特性进行改进。

The transfer function model of this valve is got, and the influence of these compensative restrictors to electro-hydraulic servovalve is analyzed.

建立了电液伺服阀的传递函数模型，分析了补偿节流器液阻对阀特性的影响。

The system has powerful data collecting and processing functions: 64 channels dynamic data collecting and 320 channels static data collecting can be provided to complex structures experiment.

多通道多变量大容量协调同步控制的复杂电液伺服系统具有强大的数据采集能力，64通道动态数据采集，320通道静态数据采集，完全满足大型结构试验的需要。

The drive system adopts 5 independent drive mechanisms and a common drive mechanism, therefore both the working space and cost are reduced. In the design of the control system, the hydraulic servo technique and modern control technique are applied. The hydraulic stepless variable speed device adopts compound open and closed static pressure drive pattern, ensuring the smoothness of the drive.

其中的传动方案设计中采用5个独立的传动系统和1个共用的传动系统，既节约了空间和成本，又满足了技术要求；控制系统设计中运用了液压伺服技术和现代控制理论技术；液压无级变速装置采用闭式和开式静压传动系统相结合的方式，传动系统平稳，波动小。

The book is divided into 14 chapters, including Introduction, continuous control system theory, process and discrete sampling, Z transform, sampled-data systems, discrete approximation of continuous system the equivalent, based on mathematical transform the classical design method, based on state space pole placement design methodology, multi-variable system of quadratic optimal control, quantitative effects, the choice of sampling period, the digital control system modeling, digital control system for a variety of design methods, variables quadratic optimal control systems, sampling cycle of selection, non-linear control of the problem, as well as digital control system, a typical application - Disk drive servo control design.

全书共分14章，内容包括概论、连续控制系统理论、采样过程和离散化、Z变换、采样数据系统、连续系统的近似离散等效、基于数学变换的经典设计方法、基于状态空间的极点配置设计方法、多变量系统的二次型最优控制、量化效应、采样周期的选择、数字控制系统的建模问题、数字控制系统的各种设计方法、变量系统的二次型最优控制、采样周期的选择、非线性控制的有关问题，以及数字控制系统的一个典型应用——磁盘驱动器的伺服控制设计等。

And it is very difficult to control the tool contouring with nanometer lever accuracy.

课题研究的主要内容包括：超精密机床进给机构的运动特性研究，进给系统的伺服控制技术和跟踪控制技术研究，两轴联动轮廓误差控制技术研究等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。