查询词典 servo system

The system hardware circuits are also designed. 5. The model of VCR software servo system is made. The reference signals for servo system are produced by software. Based on μPD78148, the algorithm to calculate speed and phase errors for drum and capstan servo is given.

建立了录像机软件伺服系统的模型，用软件方法产生了伺服系统所需要的基准信号，提出了基于μPD78148的磁鼓伺服及主导轴伺服的速度误差及相位误差的算法。

In the system of high precision and low speed, Because of the existence of the nonlinear friction, the static and dynamic performance of the servo system is very bad, such as stick slip, hunting, large error and so on, Because the traditional control of PID is hard to solve the nonlinear problem of the servo system, so this paper begins to introduce a new control method which is named adaptive fuzzy PID, It utilizes the rule of the fuzzy control to adjust the parameter of proportion, integral and differential on line, So this control method has some intelligence to improve the static and dynamic performance of the servo system.

在高精度、超低速伺服系统中，由于非线性摩擦环节的存在，使系统的动态及静态性能受到很大程度的影响，主要表现为低速时出现爬行现象，稳态时有较大的静差或出现极限环振荡；由于传统的PID 控制很难解决伺服系统中的非线性问题，因而不能适用于高精度、超低速伺服系统；本文通过引入模糊自适应整定PID控制，利用模糊规则在线调整比例、积分、微分环节，使系统具有一定的智能，从而非常明显的改善伺服系统的静态及动态性能。

This kind of fine actuator used on dual-stage servo system is effectively adaptive to the increasing recording density.

这种用在两阶段伺服系统(dual-stage servo system)的微调致动器，可以有效的对应到日渐增加的硬碟储存密度。

A dynamic mathematical model for the servo-system is developed, and the influences of the dynamic characteristics of a CNC servo-system on the machining accuracy of crank journals is discussed with the servo-system simplified to a first-order one.

而且，随着汽车产品的更新换代，对曲轴零件的加工精度和表面质量有了更高的要求。

By the research of AC servo system , we prepare to combine the application of Ac servo system and the the design of Foot orthosis for the first time , openningout a new application field of AC servo system.

本文针对数控技术、交流伺服系统和足底矫形器加工特点进行研究与分析，首次将交流伺服系统的应用与足底矫形器的设计相结合，开发出交流伺服系统新的应用领域。

However, the servo technology which exists as a kind of software in DSP, determines the performance of the servo system. The unadvanced servo technology extremely restrains the development of high performance servo system of our country.

然而，以软形式存在于控制芯片中的伺服控制技术是决定伺服系统性能指标好坏的关键技术，它成为制约我国高性能交流伺服技术及产品发展的瓶颈。

Firstly, this thesis makes an introduces on the developement of PMSM servo system based on DSP. According to the control theory of AC PMSM servo system, this paper analyzes the coordinate transformation, the rotor magnetic field orientation and the current control strategy of AC servo system. The control strategy is i_d=0. The system is orientates towards rotor magnetic field. Then the mathmatic models of PMSM in d-q coordinate are set up.

本文首先对基于DSP的永磁同步电机伺服系统的发展概况进行了介绍；根据永磁同步交流伺服系统的基本控制理论，分析了交流伺服系统坐标变换原理、常用的磁场定向方式及电流控制策略，并给出i_d=0电流控制策略及永磁同步电机按转子磁场定向的控制方式，从而建立永磁同步电机d-q坐标系下的数学模型。

Considering the inconvenience of regulation and difficulty of parameter tunning as AC servo system in practical situation, three ways of intelligent control approach to realize auto-tuning and autorecognization of AC servo system, are proposed, which is a robust controller based on two-degrees-offreedom with no tuning to controller, a auto-tuning controller based on fuzzy reasoning with no inertia recognization but tuning parameter of controller, a strategy recognizing inertia of servo system and tuning parameter or structure of controller automatically. In the same time, these control strategies are analyzed from the theory and reliability. The comparative analysis of three measures on strong and weak points is made by simulation and experiment results.

针对交流伺服系统在实际应用中存在的系统调试不便、参数调整困难等问题，提出了实现交流伺服系统自调整和自识别等智能化控制策略的三条途径：一是具有控制器无调整特点的二自由度鲁棒性控制器；二是惯量无识别但需自动调整控制器参数的模糊推理自调整控制器，三是自动识别伺服系统转动惯量并自动调整控制器参数和结构的方案，从理论分析和可实现性两方面对这些控制方案进行了论述，并通过仿真和实验研究，对比分析了各种方案的优缺点，得到了一些有益的结果。

From the experiment and analysis, it can be seen that friction limits realization of high accuracy electro-hydraulic position servo system, movement of any gimbal brings disturbance moment to servo system of other gimbals and the disturbance moment causes error, and, resolution ratio error and setting error of feedback measurement element are directly added to servo system output.

通过实验和仿真可以看出，摩擦阻碍了转台电液位置伺服系统商精度控制的实现，任何一个框架的运动都会对其余框架的伺服驱动系统产生干扰力矩并引起伺服系统误差，反馈测量元件的分辨率误差和安装误差直接反映在伺服系统输出上，对伺服系统的精度有直接影响。

Electro-hydraulic servo valve is the key component of electro-hydraulic servo system, the test of its static and dynamic characteristic is significant in theories and test research of electro-hydraulic servo system.

电液伺服阀是电液伺服系统中的关键元件，其静态和动态特性测试在电液伺服系统的理论与实验研究中具有十分重要的意义。

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。