The drill has variable speed control.
这钻机有变速控制。
This paper mainly discusses the control and protection system for the 20kw VSCF (Variable Speed Constant Frequency) Wave Power Electric Station.
本文着重介绍了20千瓦变速恒频波力发电系统的控制功能和保护体系。
The problems are:the storage of cumulating variable at power off, multi-byte division, the detection of rotating speed and the control of facilities by AC power.
这几个问题是：累积量的掉电存储问题、多字节除法问题、转速的检测问题和交流电设备的控制问题。
To improve the convergence speed of sliding mode variable structure control, a new nonlinear sliding mode surface is proposed.
针对滑模变结构控制的收敛速度问题，提出了一种新的非线性滑模面。
The variable speed control for freeway traffic is a nonlinear and time variable system, it is difficult to model with a mathematical model. A neural network control method is put forward.
针对高速公路可变速度控制是一个非线性时变系统，难于用数学模型准确建模这一特点，提出了神经网络控制方法。
Based on vector control theory, a fully digital variable speed system is designed.
基于矢量控制理论设计了一套全数字变频调速系统。
Therefore, an effective combination of ramp metering and variable speed limit control is important to achieve a good performance.
由此，匝道调节率与可变速度限制间高效的联合控制对于提高道路性能显得尤为重要。
And adjustable speed the variable air volume air conditioning automatic control system saves energy through setting different static pressure values in different time periods.
变风量空调控制系统以变频调速为手段，分时段设定静压值以实现节能。
Based on vector control theory, a full digital variable speed system is designed. The system structure and method for designing the software and hardware are introduced.
基于矢量控制理论设计了一套全数字变频调速系统，介绍了系统结构及软硬件设计方案。
The torque control, pitch control and general wind turbine coordinate control strategy of variable speed adjustable pitch wind turbine were researched.
针对变速变距机组的转矩控制、桨距控制以及整机的协调控制进行了研究。
An algorithm to improve the fuel economy of a metal belt continuously variable transmission (CVT) vehicle by CVT shift speed control is suggested in the paper.
推荐采用CVT换档速度控制的一种算法来改进金属推块无级变速器车辆的燃油经济性。
Structure parameters of its variable intake system, such as diameter and length of intake manifold, switching speed of control valve switch, etc. , are optimized.
对该汽油机采用的可变进气系统的歧管直径和长度、控制阀开关的切换转速等结构参数进行了优化设计。
The multi-target rapid maneuver control problem is studied for agile satellites with Variable Speed Control Moment Gyro(VSCMG) as actuator.
研究了以变速控制力矩陀螺（VSCMG）作为执行机构的卫星多目标快速机动的控制问题。
In this paper, the principle of variable speed pump control hydraulic differential cylinder is designed, and the simulation model of system is built, and the simulation research is carried out.
给出了采用变转速泵控闭式回路控制差动缸的原理，建立了该系统的数学模型，进行了计算机数字仿真研究。
The paper introduces the application of variable-frequency speed governor in belt conveyor. Which provides a new control mode for belt conveyor.
主要介绍了变频调速在带式输送机上的应用，为皮带输送机提供了一种新的控制方式。
A strategy of speed control for vector-controlled asynchronous motor drive system using sliding mode variable structure control with an integral action was proposed.
针对滑模变结构控制的抖振问题，提出一种用于异步电动机矢量控制系统的积分滑模变结构速度控制方法。
Take the manufacture of Z535 variable speed gear box for example, to analyze the causes of gear noise and effective technological means of noise control.
以制造z 535变速齿轮箱为例，分析了齿轮噪声的产生原因和控制噪声所采用的有效工艺手段。
The model of hydraulic motor pump variable speed control system is built.
同时建立了该液压电机泵变速控制系统的数学模型。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
This paper describes the variable-structure speed control for a DC motor.
本文着重阐述直流马达调速系统的变结构设计。
The electric control unit USES variable frequency step-less speed regulation for easy operation, operation panel is simple and clear.
本机的电气控制采用变频无级调速，操作方便、直观，操作面板简洁、明了。
This article is about the research of space control in the variable speed constant frequency wind energy conversion system.
本文主要研究了变速恒频双馈风力发电系统中的矢量控制。
The result of analysis and experiment show that the proposed method can be applied in the AC variable frequency speed control system which is nonlinear, fast changefully and difficult to be modeled.
理论分析与实验的结果表明：该方法对异步电机变频调速这一非线性、快速多变、难于建模复杂系统的控制是实用和有效的。
Adopt variable frequency control, stepless speed regulation, the roller tilt Angle can be adjusted.
采用变频控制，无极调速，滚筒倾斜角可调节。
Variable speed drive control has simple menu and easy to read display for simpler installation and use.
变速控制器带简单菜单，菜单指示简单易懂，便于安装及使用。
We discuss mainly some kinds of typical control methods of modern AC variable speed and their application in Marine electric propulsion.
综述了现代交流调速技术的几种典型控制方式在船舶电力推进中的应用。
Simulation analysis was carried out for the variable speed pump-control-motor hydraulic system. Mathematic models of inverter, asynchronous motor, fixed pump and load were set up.
本文对变转速泵控马达液压系统进行了仿真分析，建立了系统中变频器、异步电动机、定量泵、马达以及负载的数学模型。
Based on the new ANN (artificial neural network) inverse system control method, the AC variable frequency speed control system is analyzed and experimented.
本文运用神经网络逆系统这一新的控制策略，对异步电机变频调速系统进行可逆分析与控制试验。
Based on the new ANN (artificial neural network) inverse system control method, the AC variable frequency speed control system is analyzed and experimented.
本文运用神经网络逆系统这一新的控制策略，对异步电机变频调速系统进行可逆分析与控制试验。
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