查询词典 feedback control system

This design is the engineering of the instrumentation system to the reactor in PX Plant in which there are 4 single loop control, 2 cascade control and all the controllers and control valves are selected and calculated carefully to the system, the CENTUM control system will be used .

本设计对PX装置异构化单元反应器进行自动控制系统设计，其中共设计单回路系统4个，串级控制系统2个，并对控制系统所涉及到的控制器，控制阀等进行了选择且进行了相关的计算。

A new discrete reaching law is presented to improve the reaching process of discrete exponential reaching law.The discrete-time variable structure control system designed by this reaching law can not only weaken the chattering and control the system state approach to zero diminishingly,but also keep the basic property of quasi-sliding mode which can cross the switching surface step by step.This method improves the reaching process and enhances the control quality of the control system.

为了改善离散指数趋近律的趋近过程，提出了一种新的趋近律，利用该趋近律设计的变结构控制器，不仅能够大幅度削弱抖振，使系统运动最终趋于原点不存在稳态振荡，而且能使系统的准滑动模态保持步步穿越切换面的基本属性，有效地改善了趋近过程，提高了控制品质。

On the basis of analyzing and improving the dramatic characteristic of fluid drive system of the platform ,designing the computer control system of the electro-hydraulic servo control system, and programming the main control program which control the platform. At the same time, filtering signal.

在分析和提高模拟平台液压驱动系统动态性能的基础上，对模拟平台电液伺服控制系统进行计算机控制系统设计，编制了主控制平台运动的主控制程序，并对控制系统进行信号滤波。

Based on introducing the control principle of the jigger system, the analysis of control requirement for the system was achieved, and the control scheme was proposed. The construction of hardware platform based on programmable logic controller was built. The control strategies about the velocity-tension transmission system and the temperature of dyeing liquor were presented.

在介绍卷染机控制原理的基础上，对系统的控制要求进行了分析，并确定了控制方案，搭建了基于可编程逻辑控制器的卷染机硬件控制平台，提出了卷染生产过程中速度张力传动控制策略和染液温度控制策略。

Servo controller is key part of antenna control system.In some servo controller,classic PID control algorithm is adopted. In order to improve precision of control system,the integral parameter has been turned too big to use because it will cause integral saturation which depress system performance.On the other hand,ISA bus is used to communicate between servo controller and main computer.ISA is low speed interface protocol,it cannot provide more data for complicated real time position control in servo controller.

伺服控制器是天线伺服控制系统的核心环节，经典的PID控制算法在整定时整定出的积分环节参数较大，很容易出现积分饱和，造成控制精度的降低；另一方面伺服系统中伺服控制器与主控计算机通过低速的ISA总线进行通信，无法满足控制器进行复杂的位置控制运算所要求的实时大信息量的数据传输。

It can be used as the guidance and reference in the application of PLC to robot.First, the fact of desertification and the prevention method were introduced generally and the importance and necessity of this research was also discussed. By comparing the characteristics and application field of SCM control system, relay control system and computer control system, we selected the control scheme based on PLC.

本文首先总体介绍了我国土地沙漠化的现状和防治方法，论述了该课题研究的重要性和紧迫性，并通过对比分析单片机控制系统、继电器控制系统、计算机控制系统各自的特点及应用范围，最后确定了基于可编程控制器为核心的控制方案。

Mainly has carried on to the electric control system's improvement, in the beforehand black-white control system product's foundation, has used the industrial control special purpose computer -- programmable controller control system.

主要进行了对电气控制系统的改进，在以前继电器控制系统产品的基础上，采用了工业控制专用计算机——可编程控制器控制系统。

The stationary control system which core function is interlock logic control is a significant part of the train operation control system. The switch, route and train control are disposed and the train operating safe are protected by the interlocking system.

地面运行控制系统是中低速磁浮列车运行控制系统的重要组成部分，联锁是地面控制运行系统的核心功能，实现对管辖区域内进路、道岔、列车的逻辑控制，保障列车的安全运行。

In this paper, can be Phassus Siemens S7-200 controller on the three-speed winch control circuit modification, the analysis of the exchange of three-speed winch control system based on functional requirements, described the landing on Siemens PLC control system software design, given the external wiring diagram of PLC, control system provides a ladder and procedures, and simulation.

本文采用西门子可蝙程序控制器S7-200对三速起货机控制线路进行改造，在分析交流三速起货机控制系统的功能要求基础上，阐述了基于西门子PLC的起货机控制系统软件设计方案，给出了PLC的外部接线图，提供了控制系统梯形图和程序，并进行仿真验证。

In addition to the installation of concrete pump truck on the electrical control system to complete control tasks, but also installed a manual control system manipulation, it is also part of the control system.

混凝土泵车上除了安装电气控制系统以完成控制任务之外，还安装有手动控制操纵系统，它也是控制系统的一部分。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。