查询词典 loop control

In the part of the diesel engine control, the position closed loop control system was adopted includes: microprocessor, isolation circuit, power magnify circuit, accelerograph actuator of the engine and the signal modulate circuit.

对于发动机控制部分，详细讲述了采用位置闭环控制的发动机电控单元的几个主要组成部分：微控制器、隔离电路、功率放大电路、油门执行器和信号调理电路等。

In the asynchronous motor vector control system, the closed-loop control of speed is essential.

在感应电机矢量控制系统中，转速的闭环控制环节是必不可少的。

Back away from the tank liquid level control is also used in single-loop control system.

回离罐的液位控制采用的亦是单回路控制系统。

According to the fundamental of vector control,a digital closed-loop control system of permanent magnet synchronous motor based on dsPIC30F6010 was designed and a model of permanent magnet synchronous motor in the estimation two phase rotating reference frame was introduced and an extended back electromotive force equation was deduced.

根据永磁同步电动机矢量控制的基本原理，设计了一种基于 dsPIC30F6010的无位置传感器永磁同步电动机控制系统，并介绍了在估算两相旋转坐标系下的PMSM模型，推导出了反电势方程的扩展形式。

As long as the root of the characteristic equation is within the unit circle of z-plane and the corresponding PID parameter is got, the closed loop control system is sure to be stable. Although the root of the characteristic equation can vary within the unit circle of z-plane,different value may affect the control property differently.

本文所采用的这种确定PID参数的方法，虽然可以使特征方程的根在z平面的单位圆内任意取值，但各种取值情况对变风量空调系统的控制品质的影响却不同，因此，要对各种特征方程的根的取值情况进行寻优，本文采用遗传算法对特征方程的根进行寻优，从而使控制器的参数得以优化。

In Chapter 5, the author focuses on the experiment of the hydraulic elevator control system and analyzes the closed loop control results of system.

论文的第五章是单片机控制的液压电梯速度控制系统实验研究，介绍了实验流程，并对实验现象和结果进行了分析。

It introduced mechanical and electrical control system characteristics of improved welding cart,especially introduced the structure of rising up and down convey roller and additional length of run-on tab,data exchange with inside welding machine control system and welding speed closed loop control.

介绍了改进后焊接车的机械和电气控制系统特点，主要说明了升降输送辊和加长引弧板结构，以及内焊机控制系统数据交换及焊接速度闭环控制等。

This paper studies a single phase voltage SPWM inverter based on repetitive control, whose key point is achieving a good sinusoidal output wave. Firstly, this paper detailed discusses the inverter system"s working characters and mathematic model. Then repetitive control technique and the choice of its parameters, the whole system"s stability, the strategy of closed-loop control are discussed. Finally

本文首先阐述了逆变系统的工作原理，对单相逆变电源的建模进行了详细讨论；然后论述了重复控制技术理论的原理，重复控制系统参数的选择、整个系统的稳定性、闭环反馈控制的策略；最后给出了基于MATLAB的仿真结果和基于单片机C8051作控制系统的实验结果，并对实验过程中存在的问题进行了详细的讨论。

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

With the rapid development of the control technology, bringing network into traditional control system and realizing long - distance close - loop control have gained more and more attention.

随着控制技术的飞速发展，把通信网络引入到传统的控制系统实现迅速准确的远距离闭环控制成为人们日益关注的课题。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。