The movement of top—spin and loop drive of the table tennis also follows the princinples of mechanics.
乒乓球运动中的上旋球及弧圈球运动，也遵循力学的运动原理，研究这些原理，对提高理论水平有帮助。
The racket with merits of good bounce, high speed and fine control, is suitable for quick-attack with loop drive players.
弹性好，速度快，出球旋转下沉，易控制，适合快攻结合弧圈选手使用。
The short quick attack play is the Chinese traditional superior play but it has been under the challenge of loop drive since its first appearance in the1960s.
近台快攻打法是我国的传统打法，自60年代世界乒坛出现了弧圈打法以来，我国的近台快攻受到了一定的威胁。
The short quick attack play is the Chinese traditional superior play but it has been under the challenge of loop drive since its first appearance in the 1960s.
近台快攻打法是我国的传统打法，自6 0年代世界乒坛出现了弧圈打法以来，我国的近台快攻受到了一定的威胁。
This essay points out the significance of mastering the techniques of backhand Loop drive with non - handshake grip in table tennis and illustrates is essentials.
掌握乒乓球直拍反手孤圈球技术的意义；指出了直拍反手弧圈球技术的动作要领；
The system shown in Figure 3 is that of a closed loop, with sensors feeding the control system that drive changes in the environment.
图3所示的系统是一个封闭循环，传感器负责为控制系统提供数据，而控制系统则驱动着环境中因素的变化。
I would loop around and around to drive this road over and over, driving fast, kissing the speed limit, feeling the brush of branches against the car.
我会绕着这条小道来回反复行驶，加快油门，极速前进，感觉到树枝刷刷地刮着车身。
Projects should be governed using a control loop to drive project variance to zero.Figure 8: project governance control loop.
应该用控制循环来管理项目，促使项目方差为零。
A kind of the pulse control mode, the drive and motor closed loop, but not to the numerical control system, the feedback device, in a sense, can open loop control called the servo control.
一种采用脉冲控制方式，此种驱动器与电机闭环，但不反馈到数控系统，这种驱动器在某种程度上可称为开环控制的伺服控制。
The controller make up of TMS320F2812 DSP chip, detecting circuits include sampling circuit, modulate circuit and phase locked loop and other periphery control and drive circuit.
本文设计的控制器以TMS320F2812DSP芯片为核心，加上检测电路（包括采样电路、调理电路、锁相环等）和其它外围控制和驱动电路构成。
Adopting ac servo motor as a drive device, can and dc servo motor as a high precision, high performance and a half closed loop or closed loop control system.
采用交流伺服电机作为驱动器件，可以和直流伺服电机一样构成高精度，高性能的半闭环或闭环控制系统。
A kind of the use of impulsive control mode, the drive and motor closed loop, but not feedback to the numerical control system, this drive, in a sense, can open loop control called the servo control.
一种采用脉冲控制方式，此种驱动器与电机闭环，但不反馈到数控系统，这种驱动器在某种程度上可称为开环控制的伺服控制。
The output signal of the outer loop ACTS as the input signal of the inner loop. The inner loop engenders a synchronism drive signal to control current.
控制器由内环和外环两部分组成，外环的输出信号作为内环所需的输入信号，内环产生一个同步驱动信号，实现对电流的快速控制。
This system indicates that the resonance frequency of servo drive in CNC heavy cutting is equal to the lower one of mechanism and speed loop resonance frequency.
通过对五阶系统的分析表明数控强力切削伺服进给系统的谐振频率取决于机械谐振频率和速度环谐振频率中较低的一个。
Analog circuit mainly realizes the drive system consisting of physical loop and gain-controlled loop and signal pre-processing system which ACTS on output signals from primary instrument.
模拟电路主要实现了由物理闭环和增益控制闭环构成的驱动系统，以及对一次仪表输出信号进行预处理的信号预处理系统。
When designing the step motor drive circuit of 5 phase 10 pat, 89c2051 is adopted as the Loop allotter. The VMOS is adopted in power elements. It is designed as chopper-type constant current circuit.
设计五相十拍步进电动机驱动电路时选择了89c 2051作为环形分配器，而功率器件选用电压型的VMOS管。
Then the drive system of the fin stabilizer is analyzed. To give a control policy which AC motor is controlled by applying electric current loop, speed loop, position loop in this system.
然后对转鳍驱动系统进行了分析，确定了在系统中使用电流环、速度环、位置环的交流电动机控制策略。
Application shows that this drive control system has higher dynamic performance and is capable of close-loop control and communication and ease of network configuration and maintenance.
实际应用表明，该控制系统动态性能高，适合于复杂的闭环控制和通信任务，易于进行网络配置及维护。
The friction drive mechanism moves well even when driven at high frequency and with long strokes, so it can be used with open-loop control systems for micro displacement.
进给速度可通过改变驱动脉冲的频率调节，机构在高频驱动大位移动作时亦表现出准确的步进特性，可用于小型机电系统的开环进给驱动。
But the good performances of PMSM drive system are based on closed-loop control, it is quite important of how to obtain the rotor position and speed signals in this system.
但是永磁同步电机驱动系统的良好性能都是建立在闭环控制基础之上的，因此如何获取转子位置和速度信号是整个系统中相当重要的一个环节。
When the cable loop is guided around a wheel on the ground theforce difference will drive the wheel.
当电缆回路的指导周围的车轮在地面上的力量差异将驱动车轮。
This article presents a design of permanent magnetic brushless DC motor control system and mainly involves the hardware circuit design of speed closed loop and power module drive.
介绍了一种永磁无刷直流电机控制系统的设计方案，主要涉及速度闭环和功率模块驱动的硬件电路设计；并通过实验证明该设计可直接用于小型无刷直流电机的控制。
The electric drive system is designed on the basis of the electric transmission feature in tank, which composed of DSP is a two closed loop and digital control system.
该系统按照坦克电传动的特点、以DSP为主控芯片设计成的数字控制双闭环系统。
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。
It presents the circuitry diagram of the main loop of electric drive system and the external wire-connection diagrams of PLC and converter.
给出了电力拖动系统的主回路电路图、PLC和变频器的外部接线图。
This system with brushless DC motor (BLDCM for short) as its drive adopts three-loop control strategy to achieve the aim at high accuracy position trail of rudder.
该系统以无刷直流电机作为伺服电机，采用三闭环的控制策略，实现舵面位置的高性能跟踪。
The drive system outputs to drive magnetic loop on the primary instrument, accordingly simulate the work condition of Coriolis force.
驱动系统输出信号驱动一次仪表上的线圈工作，模拟了科里奥利力的产生条件。
The main control structure of the servo drive is formed by two cascade loops, which are the current inner loop and the velocity outer loop.
驱动器控制架构采用电流与速 度迴路串级的双迴路控制架构，其中可调参数为电流与速度控制器参数。
The main control structure of the servo drive is formed by two cascade loops, which are the current inner loop and the velocity outer loop.
驱动器控制架构采用电流与速 度迴路串级的双迴路控制架构，其中可调参数为电流与速度控制器参数。
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