查询词典 automatic control system

Because there are many types of components, it selects components appropriately based on the demand of products. This system is made up of the mode of coating paper with rollers, drive system composed of steel net supported and three drivers, dryness system composed of oven with air floated and drying um with electric tubes, synchronous control system with the positions of strain rollers. And it developed an appropriate software of control system. This system achieves demands of operation, stabilization, continuity and high efficiency.

由于涂布系统中各部件存在多种类型，根据生产产品的品质要求对涂布系统各部件进行了选型，最终选择了门辊涂布方式，采用钢网支撑，三电机控制的传动形式，结合气浮式烘箱以及电热管加热的烘缸组成的干燥系统，张力辊位置为控制对象的同步控制系统，同时设计了一套相应的软件控制系统，以实现连续稳定高效的生产要求。

According to evaluation of the thermal, hydraulic, environmental and mechanic characteristics and energy performance of building and VAV air-conditioning system, and evaluation of the control performance of local control loops using the simulator of VAV system, this paper presents five on-line supervisory control strategies for local control loops: on-line optimization of VAV supply air static pressure set-point, on-line optimization of AHU supply air temperature set-point, on-line optimization of on/off set of CAV sub-system, on-line optimization of outdoor air set-point and on-line optimization of chilled water secondary pump pressure set-point.

通过数字仿真器对建筑物及其变风量空调系统的热力、动力、环境和能耗等运行特性的模拟，以及对系统常规采用的下位机控制回路可控性和稳定性等控制特性的研究和分析，本文先从局部的角度开展了系统局部优化的研究。提出并在仿真器上分别实施了VAV送风静压设定的实时优化，AHU送风温度设定的实时优化，CAV子系统开／停的实时优化，新风量设定的实时优化以及二级泵冷媒水供水压差设定的实时优化。

Using the proposed identification and control strategy, the identification results of two kinds of systems and the simulation of a bilinear process control system are presented. The generality of the model and the simplification of identification and control method together with the simulation results show that the above strategy has strong possibility to nonlinear system and high order system identification for process industries and the excellent control performances superior to a standard PID controller for the same process.

用该方法进行了两个非线性系统的模型辨识和一个双线性系统的控制仿真，模型的通用性、辨识和控制方法的简单易用和仿真结果表明，所提出的方案对过程工业和非线性、高阶系统有很好的实用性，有着比标准PID控制器好得多的控制效果。

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。

Aimming at the fuel control requirement of micro-turbojet,the automobile's electric fuel pump with adaptable improvement is chosen as fuel-feed system.The performance of fuel pump and the technical difficulty of flux control as the speed of pump doesn't be measured are analyzed.Using Philips 83C552 MCU as the main control chip,the system adopts voltage negative feedback combined current compensation instead of rotation speed negative feedback and a PWM convertor to design the flux closed loop control system.

针对微型涡喷发动机的燃油控制要求，选用汽车用电动油泵进行适应性改进作为供油执行装置，详细分析了电动油泵的特性及泵转速无法测量情况下流量控制的技术难点，并以83C552单片机为核心，采用电压负反馈加电流补偿代替转速负反馈、电机通过PWM驱动的方法设计电动油泵流量闭环控制系统。

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。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044