控制原理

The paper analysed the characteristics of noise pollution in cement plant harm to human health, and emphasized the control theory and detail method of noise from ball mill and fan, fianlly put forward the control measure.

文章分析了水泥厂噪声污染的特点，阐述了噪声对人健康的危害，重点分析了球磨机和风机噪声的控制原理和具体方法，提出了综合治理的措施。

Principle of the set with respect to board form model, control and got used to a method to undertake discussing oneself.

就板形模型的设定、控制原理和自适应方法进行了探索。

Based on the above actuality, this paper studied the high quality incineration technics and theory in a self-designed rotary incinerator. The variation of several operation conditions such as waste feedrate, excess air ratio, air distribution and rotation speed of the fulcra has been employed to study the formation and control theory of NOx, SO〓and HCl. Based on the experimental results, a simple and comprehensive model has been proposed to describe the process of acid gas formation and reduction. The results show that the formation of pollutants strongly depend on the incineration state of the solid waste in the rotary incinerator.

本研究在—自行设计的新型转式垃圾焚烧炉中，重点研究了焚烧炉的优质焚烧工艺和理论，并在此基础上，研究模化有机垃圾在转式焚烧过程中酸性污染气体NOx，SO〓和HCl的生成控制原理，特别是研究进料率、过剩空气系数、配风和转轴转速等条件对NOx，SO〓，HCl生成的影响，并在此基础上建立了转式垃圾焚烧炉中酸性污染气体的生成理论模型，结果表明，焚烧过程污染物的生成强烈地依赖于垃圾在转式焚烧炉内的燃烧状态，必须在高垃圾燃烬率和低污染物排放之间寻找优化的平衡条件。

To improve the stability of Arcjet discharge plasma in low current and high voltage mode, research on the demand of output characteristics of Arcjet Power Conditioning Unit was conducted. In this paper, based on PWM invertors and current mode control, using MOSFET as the main power device, an Arcjet Power Conditioning Unit was developed. Through adding a closed loop feedback circuit of output voltage, it can make the output characteristics of PCU be positive resistance to ensure the stability of Arcjet discharge plasma. The experiment indicates that this PCU can make Arcjet engine work at high voltage mode (100 V, 10 A) and ensure the stability of arcjet discharge plasma. Finally, it provides the experimental data of Arcjet when working.

为了解决小电流、高电压下电弧火箭等离子体的稳定性问题，研究了电弧火箭发动机对电源调理单元的输出特性要求，基于逆变电源脉宽调制技术与峰值电流型控制原理，以MOSFET为主功率器件，研制了一台电弧火箭电源调理单元，给出了Arcjet工作时的实验数据，通过增加PCU输出电压的闭环反馈电路，可以使PCU的输出外特性呈现正阻性，保证电弧的稳定燃烧，实验结果表明，该电源调理单元能使电弧火箭发动机达到高电压工作模式(100V， 10A)，保持电弧工作的稳定性。

This paper took Informationflow Matrix of Enterprise into the analyzing of the information integration.

提出了基於企业关键绩效指标建立企业信息流矩阵中各部门的输入信息，采用闭环控制原理确定各部门的输出信息和方向。

We analyzed the electro-hydraulic proportional variable displacement piston pump from three aspects of its structure,control principle and mathematical model,and compared the main characteristics of an open-loop controlled pump with a closed-loop controlled pump.

从结构、控制原理和数学模型等3个方面对开环和闭环电液比例变量柱塞泵进行分析，比较二者的主要性能特点。

All those studies would be references and theoretical bases to design and working-process analyses of parafoil system.

利用最优控制原理对翼伞系统的归航问题进行了研究，并对其特点进行了分析和总结。

The APMM has similar mechanical and control technology to the well-proven SPMM and is supplied with Windows NT software based upon the well-proven software used on the SPMM.

APMM与著名的SPMM具有类似的机械结构和控制原理，并配备有基于Windows NT软件的SPMM所使用的经过广泛验证的软件。

The paper analysed the causes of the tool carriage failure of the NC lathe model ck7815 based on the work principle of the machine and reconstructed the tool carriage by dint of a set of idle hydraulic system of the machine to improve the position precision and enhance reliability of the machine effectively.

本文根据CK7815数控车床的刀架系统的故障情况，从分析控制原理入手，利用原机床不用的尾架液压系统对刀架进行改造，有效地提高了刀架定位可靠度和精度，提高了工作效率。

This system with greater time-delay and time-changed parameter as well as interrupts is described in principle.

着重从控制原理上介绍了在工程中处理大纯时间滞后、参数变化和抑制干扰的一种实现方法。

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。