伺服系统

Currently most domestic break-test-plateform adopt the liquid-pressure-servo technique, which possesses the advantages of higher frequency-response and higher controlling exactness, but in the same time , the disadvantages of higher cost, variation of function with the change of oil viscousness produced by the fluctuation of temperature.

目前，国内的制动器试验台大多采用的是液压伺服控制，这种控制具有响应频率高、控制精度高等优点，主要缺点是系统成本高、油液粘度随温度变化引起工作性能的变化、且液压系统对油液的污染比较敏感，必须要有良好的保护和过滤措施。

The system main demo function s and the method to find the zero point are also given.

介绍了伺服电动机在位置控制演示中的应用；叙述了系统的主要组成部分；阐述了系统的主要演示功能和零点找寻方法。

Based on the dynamics analysis of the fastener that suffered impact or alternating load, an effective design scheme of the hydraulic power mechanism of the fastener tranverse viberation bedstand with the limitation of the oil power is presented in this paper.

在对紧固件承受横向冲击或交变载荷时进行动力学分析的基础上，对紧固件横向振动试验台在油源功率受限的条件下的液压动力机构的设计问题，提出了有效的解决方案，即用相对较大的动力机构的功率配置来降低系统对油源功率的要求，同时用双阀并联的方法克服了大流量伺服阀频宽较低对系统频宽的影

This paper presents bushless DC motor servocontrol system based on DSP,then makes a brief about control strategy and design scheme of software and hardware that realizes this control system.

介绍了一种基于DSP的无刷直流电机伺服控制系统，简述了实现该控制系统的软件和硬件设计方案及控制策略。

A new mechanical structure with winch、staff and gimbal is used to develop a gyrometer test table to realize the high frequency of the operation. A "soft-measurement" is used to reach the high precision and this idea enhances the reliability too. By controlling the servo amplifier the control system is designed simply.

为了使测量双轴摇摆台实现高频率的运动，机械结构上设计采用了一种新型的曲柄、连杆、万向节机构；为保证系统的高精度和可靠性提出了&软测量&补偿方法；通过伺服放大器直接控制电机，简化了控制系统的设计。

Through the comparison, we use traveling-wave method to measure dispersion and nonresonant perturbation method to measure interaction impedance.

测量系统采用虚拟仪器的设计思想，由测量平台、伺服电机、矢量网络分析仪、计算机等硬件组成，用LabView完成了系统软件设计。

TL-5 Intelligent Slubby Yarn Control is the upgrade production Of the normal Slubby Yarn Control which is controlled by servomotor. It contains quality manage、alarm system、technical storage manage system、technical parameter designed by computer expert,and the spinning can be selected in random.

TL-5型智能竹节纱控制器是普通的伺服电机纺竹节纱控制器的技术升级产品，它包含了质量管理、报警系统、工艺仓库管理系统、工艺参数计算机专家设计，随机任意抽取纺纱，工艺纺纱等全方位的升级。

This systerm is mainly basing on the MCU DS89C420, on basis of solvement and calculation of various electric signals, it can adjudge the signal of crank angle sensor . According to the feedback impulsury of server electromotor photoelectric coder, it can samples datas of top dead center and piston distance continuously.

本文所述的数据采集系统是以高速单片机DS89C420为核心部件的工作系统，能够对各种电信号进行处理、运算，实现对曲轴角度传感器的信号进行判断并依据伺服电机光电编码器的反馈脉冲进行曲轴上止点和活塞行程数据的连续采集。

Based on the characteristics of the chip we designed to control the hydraulic servo system for the core of this system, control circuit valve using digital potentiometer, through programming, automatic regulation resistance, high AD698 and accurately by an LVDT valve mechanical displacements converted single polarity dc voltage, through the simulation, the design of PID algorithm of closing valves, the degree of control system and superordination machine, realize the valve control circuit of adjustment and control.

基于上述特点我们设计了以单片机为控制核心的液压伺服阀控制电路，本系统采用数字电位器，通过编程自动调节电阻值，采用AD698 与LVDT 配合，高精确地将阀门的机械位移转换成单极性直流电压，通过模拟PID调节算法，设计实现了对阀门开合程度的控制，该系统与上位机进行通信，实现对阀门控制电路的调试及监控。

The article introduces some needed resolving problems. It brings forward principium of control, How can drive the servo signal and X and Z to the coordination of movements; How to change the feed rate; design of system structure, confirmation for input and output point, I / O address allocation;and also the project for speedup/down control during the screwthread processing. Method of programming design and manual operation trapeziform figure in system of numerical control lathe Corresponding project to problems is provided synchronously.

介绍可编程控制器应用于车床数控系统需要解决的问题，如何产生驱动伺服机构的信号及X、Z向的动作的协调；如何改变进给速度等；提出PLC作为数控机床主控制器的控制原理；系统结构设计；输入/输出点数确定及输入/输出点的地址分配；螺纹加工中升、降速的解决方案；程序设计及具体操作梯形图设计的方法，并给出相应的解决方案。

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。