控制原理

The principle of alkalinity measurement and control,software and hardware design were discussed in detail.

介绍了碱度检测原理、碱度控制原理、监控系统的硬件电路设计和软件编程，并给出了应用实例。

This paper introduces the control principle of PLC, the composition and operational principles of central air-conditioning water circulatory system.

本文介绍了PLC的控制原理、中央空调水循环系统的组成和运行原理。

Considering the problems of spurgear precise plastic forming, such as high deformation resistance, poor flowability and especial hardness to fill cant of gear, technological plan was developed based on precise plastic forming technique, successive control principle and consecutive local deformation theory. Moreover, structures of the rolling preform die and the die with up and down wellrounded forcer for stamping-extrusion and bulge-extrusion combining forming were designed too.

因此本文的主要研究内容和结果如下：本文以某种直齿轮：模数m＝2，齿数z＝20，压力角α＝200，变位系数x＝0为对象，针对直齿轮精密塑性成形变形抗力大，流动性差，特别是成形中齿轮角隅部分更加难以充满问题，基于精密塑性成形技术、逐次控制原理以及连续局部变形原理提出了"直齿轮滚轧制坯－镦挤、胀挤复合精成形"的工艺方案，设计了滚轧制坯的模具结构和上下冲头带圆角的镦挤、胀挤复合精成形的模具结构。

This article first on to the topic background, the topic object basic survey and the topic research goal has given brief showing, then has made a detailed elaboration to the AC-DC-AC inversion principle of work, emphatically has analyzed based on the AC-DC-AC inversion control principle as well as the SPWM profile several productions method.

本文首先就对课题的背景，课题对象的基本概况以及课题研究的目的做了简要的说明，然后对AC-DC-AC逆变器的工作原理做了一个详细阐述，着重分析了基于AC-DC-AC逆变器的控制原理以及SPWM波形的几种生成方法。

A kind of quantitive weighing method for marine product was introduced.

介绍了一种海产品定量称量方法，阐述了该方法的工作原理及控制原理，并简单分析了软件设计流程。

Firstly, counterchanges the control signal coordinate, behind, forecasts and filters the waves according to the α-β-γ filter arithmetic, finally, reverts the forecasting result coordinate, and inputs the forecasting result...

根据复合控制原理，对控制信号首先进行坐标变换，然后依据α-β-γ滤波算法进行预测和滤波，最后，对预测结果进行坐标还原，将预测值加到伺服控制的输入端。

To solve the problems of the temperature control in rolling reheating furnace,the strategy of human-simulated intelligent control is constructed on the basis of its principles.

针对钢坯加热炉炉温控制现状及存在的问题，依据仿人智能控制原理，建立炉温的仿人智能控制策略。

The control principle of the servo platform in modulated rotary steerable drilling system was studied. A control system of servo platform composed of upper and lower turbo - dynamotors, platform control axis and electronic storehouse was designed.

对调制式旋转导向钻井系统稳定平台的控制原理进行了研究，设计了由上、下涡轮发电机、控制轴及电子仓组成的三环控制稳定平台。

Based on these, the single phase converter system is studied in detail, including the selection of the main circuit scheme, the formation of Sine-wave Pulse- width Modulation signal, the design of the drive and protection circuit of IGBT, and the design of high frequency transformer. Finally, the simulation software is employed to test the effect. And the result is satisfactory.

在此基础上，本文主要对电能质量控制稳定器所需的DC/AC控制电源进行了详细研究，包括主电路方案的选择、SPWM波的生成、IGBT的驱动和保护电路、高频变压器的设计以及闭环电压控制原理，最后进行了输出电压的计算机仿真分析，结果是令人满意的。

The software of the surface monitoring and control system was developed.

根据控制原理，设计了一套从地面控制井下的工具，以实现轨迹控制的指令算法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。