The volume loss of speed control loop neither overflow nor throttling losses, high efficiency, but poor low-speed stability.
而容积调速回路既无溢流损失，也无节流损失，效率高，但低速稳定性差。
Comparing to the standard meter in speed control loop in this experiment platform, it judges intelligently the loop you have designed.
与该实验台标准的进油节流调速回路相对照，对所设计的回路进行智能判断。
The servo loops include speed control loop and position control loop plus feed-forward control, therefore the system is a compound control system.
该伺服系统包括速度环和位置环以及前馈控制，因此该系统是一个复合控制系统。
In order to carry out the constant line speed and the constant tension for the rolling of plastic films during reversal, loop control of the rotating speeds and the tension is adopted.
为实现翻转过程中薄膜的恒线速度、恒张力控制，采用转速和张力的闭环控制，将线速度作为主控制变量，进行综合控制。
At the same time using Holzer sensors will be converted into pulse frequency motor speed feedback to the MCU, realize the speed closed-loop control, to achieve speed detection.
同时利用霍尔传感器将电机速度转换成脉冲频率反馈到单片机中，实现转速闭环控制，达到转速检测目的。
The double close loops of speed and current control is introduced in the system and the PI control is implemented in the current and speed loop, the position of rotor pole is detected by hall element.
系统采用电流、速度双闭环控制，电流、速度的调节采用PI调节，转子磁极位置通过霍尔元件检测。
The servo control system combines position loop, speed loop, current loop with algorithm of space vector pulse width modulation(SVPWM).
系统采用位置、速度和电流环三环控制，并结合空间矢量脉宽调制（SVPWM）算法。
The EXL is used to control the take-off device by providing a pulse generator to measure line speed accurately for closed loop control.
EXL控制器用于控制拆卸装置的速度，通过脉冲发生器测量不合环路的线速度来实现。
It has the higher switching speed and frequency and can be used as the pilot valve for a larger flow rate valve, or as a direct control valve for small flow rate hydraulic loop.
该阀具有很高的切换速度和频率，可以用来作为大流量高速开关阀的先导控制阀，也可以在小流量回路中直接作为控制阀使用。
The institution of all the humping speed control systems basically depends upon open loop control which restricts the character of speed regulating and random adaptability to the circumstances.
现行各种制式的驼峰速度控制系统，都基本属开环控制，限制了速度调整的品质和当外界因素变化时的随机适应能力。
In particular, the three closed loops including position loop, current loop and speed loop, and the hardware structure of the control system were described in detail.
详细介绍了控制系统采用的硬件结构和位置环、电流环和速度环三闭环控制方法。
A general introduction was made on effect, control principle and PLC logic control of the loop control system in high speed rod rolling.
概述活套控制系统在高速线材轧制中的作用、控制原理、PLC逻辑控制及活套调节对精轧机和夹送辊、吐丝机之间张力的影响。
With speed and current close-loop control based on digital PI algorithm and the high performance of the DSP, high accuracy and high reliability control can be easily realized.
通过速度与电流的双闭环数字PI算法结合DSP的优越性能来达到高精度，高可靠性的控制目的。
The software phase-locked loop (SPLL) technology in the steady speed control of permanent magnet brushless DC motor (BLDCM) in gyro was discussed.
研究了软件锁相环技术在陀螺用无位置传感器无刷直流电机稳速控制系统中的应用。
The control process of bar rolling speed was presented and the effects of low tension, loop and cascade control in speed regulation were described.
介绍了棒材轧线的系统结构及轧机速度控制过程，详细说明微张力、活套以及级联控制等在速度调节中的作用。
Finally, the indirect vector control system is made as the research target and double close loop control systems which contain synchronous current inside loop and speed outside loop are introduced.
首先对磁场定向控制理论进行了详细分析，比较后采用间接磁场定向的控制方法，并建立基于同步电流内环、转速外环的双闭环控制结构。
By block diagram and feedback-control principles expression is derived for speed-stiffness in the loop and speed error due to load calculated.
并用方块图与反馈控制理论导出了这种调速回路速度刚性的数学表达式，估算了由负载引起的速度误差。
This paper presents a novel open-loop speed control method for induction motors that provides high output torque and nearly zero steady-state speed error at any frequency.
提出了一种新颖的感应电机开环速度控制法，在任一频率下，它不但能使电机输出高的力矩，而且使稳态速度误差几乎等于零。
On control, speed closed loop controlling based PID is utilized and the stable run of motor is realized.
在控制方法上采用基于PID方法的速度闭环控制，实现了电机的稳定运转；
Software of the drive and control system realizes the current and speed closed-loop control, which contain PI adjuster.
软件部分是主要是实现对直线电机电流和速度的双闭环控制，电流和速度的调节均采用PI调节。
Power braking is usually required when mine hoist is at reducing stage, but sPeed closed-loop control is difficultly realized.
交流矿井提升机的减速阶段，一般要求主要用动力制动，但速度闭环控制难实现。
Brushless motor control system design based on C8051 was introduced, speed and current double close loop control was realized.
论述了基于C8051的直流无刷电机控制系统设计，实现了速度、电流的双闭环控制。
The winch of inner loop and speed regulator are researched by means of classical control theory.
分别利用经典控制理论研究了绞车部分的内环、速度调节器；
According to all of these characteristics of the system, a three-loop fuzzy sliding control mode is adopted, the speed and position loop are outer loop, and the current loop is inner loop.
根据系统这一特点，采用三闭环模糊滑模控制策略，外环为速度和位置闭环，内环为电流闭环的方法设计控制器，并进行了仿真实验研究。
In the double loop of control system, a PI speed controller is adopted in the speed loop, and a vector controller is used in the current loop.
控制系统采用双环控制，速度环采用PI转速控制，电流环采用矢量控制。
By this linearization model, the speed tracking control law is designed to increase the celerity of speed tracking while keeping the whole closed loop system stable.
通过此方法设计的速度跟踪控制，在保证整个闭环系统稳定的情况下，提高速度跟踪的快速性。
A rotor flux oriented control system with flux and open-loop speed estimators is described. The key module of this system is the flux and speed estimator.
介绍了一种采用磁链和开环速度估算器的转子磁场定向的控制系统，系统设计的的关键问题是磁链的观测和速度的准确估算。
This paper deals with a closed-loop digital control for a hydraulic valve, controlled motor speed system.
研究了用位总线微机构成的液压阀控马达速度闭环数字控制系统。
The system had many features such as high speed, high accuracy, untouched measuring and closed-loop control. The system is used on-line measuring and control of diameter measure.
该系统具有检测速度快、精度高、非接触检测、闭环控制等特点，完全适用于回转体直径尺寸的在线检测和控制。
In this paper, speed loop adopting fuzzy control scheme which takes place of common PI controller, is to improve the performance of disturbance rejection.
本论文首先将模糊控制应用于变频调速系统的转速环，取代常规的PI调节器，旨在提高系统的抗干扰能力。
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