查询词典 loop the loop

The plans of controlling the PMSM include the open-loop control and the close-loop control. The open-loop timing control system has no feedback of the current and the position.

永磁同步电机的控制方法分为开环和闭环，开环调速系统不需要进行速度反馈或位置反馈，故系统结构简单、易于控制。

Simulation results show that the performance of the open-loop control system is poor when the model parameters change. The second system is designed via feedback linearization method. Since the path signal is introduced as feedback signal, the designed closed-loop control system improves the system robustness to the parameter perturbation. Simulation results verify that the closed-loop control system shows better performance than the time optimal control system.

前者侧重于时间最短的控制性能，但由于是开环控制，当出现参数摄动时，系统的性能会受到较大影响；后者由于引入了飞艇轨迹的反馈信号，因而相对提高了系统对参数摄动的鲁棒性，计算量较小，并且仿真结果证实了这种闭环系统设计方案可以抑制参数摄动带来的影响，与时间最优开环控制系统相比，显著提高了控制精度、改善了控制效果。

By comparing the open-loop control system, closed-loop control system and mixed-loop control system, the paper drew a conclusion that the new control system could shorten the blind area, eliminate the dead area, and autolevel cotton sliver twice.

通过比较开环、闭环和混合环控制系统认为，该控制系统能够缩短盲区，消除死区，并能2次匀整条干。

In order to realize real-time control, the paper studied two kinds of closed-loop control structures such as based on scalar quantity and double closed-loop control structure, moreover established their control structure, then simulation to the double closed-loop control structure of voltage source type matrix converter. The simulation results indicate that reach the real-time control requests, the system dynamic response performance is good, the converter input output can be adjusted in the short time.

为实现电压源型阵变换器的实时控制要求，论文对基于标量控制和双闭环的两种电压源型矩阵变换器闭环控制结构进行了研究，分别建立了这两种闭环控制的控制结构，并且对电压源型矩阵变换器的双闭环控制结构进行仿真，仿真结果表明达到了实时控制的要求，系统的动态响应性能好，变换器的输入输出能在较短的时间内达到调节。

In a second aspect, this invention provides a surface-mount inductive loop detector including: an inductive loop which is adapted for connection to an external electronic controller device; a protective cover in the form of a substantially inflexible ring having a hardened, bevelled peripheral edge; said ring adapted to accommodate the inductive loop between a mounting surface and a lower surface of the ring and provided with means for fixing the detector to the mounting surface.

在第二方面，本发明提供一种表面安装感应环检测器，包括：感应环，该感应环适用于连接到外部电子控制器设备；保护罩，该保护罩为具有基本上呈柔性的圆环，该圆环具有硬化的、倾斜外周缘；所述圆环适用于容纳位于安装表面和圆环下表面之间的感应环，并设有用于把检测器固定到安装表面的装置。

In order to overcome the difficulty in estimating the ripple component on dc-side capacitor reference voltage, the modified control algorithm is proposed by ignoring the ripple component. Furthermore, the relation between control performance and damping coefficient is researched. In addition, the reasons of voltage source converter inner-loop control overmodulation are also analyzed. Based on the relation between control performance and VSC inner-loop input saturation, damping coefficient is adjusted on-line by fuzzy logic reasoning so that the trade-off between control accuracy and limitation of VSC inner-loop control overmodulation is solved preferably.

由于在线计算直流电容指令电压波动量十分困难，在控制方法的执行中忽略波动量的影响，简化了控制方法的实现；此外，该方法还研究了所注入的阻尼大小对控制效果的影响以及APF内层控制过调制产生的原因，针对无源性控制律跟踪精度的要求与内层控制过调制限幅条件间的矛盾，通过构造模糊逻辑推理环节实现阻尼系数的在线调整，在满足内层控制限幅条件下确保跟踪精度和补偿效果。

First, we consider nonholonomic chained systems with modeling error, in this section,based on back-stepping , using the so-called adding a integrator , state-scaling technique , we design discontinuous feedback law,such that the trival solution of the closed-loop systems global strong stable; Second,we consider high-order nonholonomic chained systems with modeling errors and external disturbances, in this section,using input/state-scaling and integrator backstepping methods , we design discontinuous feedback law and give out the switching strategy, such that the closed-loop systems global /C-exponential stable; Finally, we consider a class of more general power chained form systems with particular drift-terms, in this section , using Lyapunov method, we design time-varying feedback law , such that the closed -loop systems p—exponential stable.

第一部分考虑的模型为带有模型误差的高阶非完整链系统，我们运用加幂积分器、State-scaling技巧以及基于Back-stepping方法构造出不连续反馈律，从而使得所讨论系统的闭环系统的平凡解全局强稳定；第二部分考虑的模型为带有模型误差的不确定高阶非完整链系统，这一部分我们运用input／state scaling和integrator backstepping方法构造出不连续反馈律，并给出切换策略，使得所对应的闭环系统全局κ-指数稳定；第三部分考虑的系统是形式更为一般的且带有特殊形式漂移项的幂链系统，利用Lyapunov函数方法，设计出时变反馈律，从而使得相应的闭环系统ρ-指数稳定。

At first,the performance of different discriminators in code and carrier loop are compared based on anlyzing the principle of GPS tracking.Then the tracking effects with different loop patameters are simulated and compared.At last,a couple of discriminators are selected and proper loop parameters are designed to track actual GPS intermediate frequency signal,and the tracking results validate the design.

在分析GPS跟踪原理的基础上，对比码环与载波环不同鉴相器的性能，然后在不同环路参数下对跟踪效果进行了仿真比较，最后选择一组鉴相器并设计合适的环路参数，对实际采集的GPS中频信号进行跟踪，跟踪结果验证了设计环路的有效性。

Begin to wrap the right loop around back of the left loop so that, like the Two Loop Shoelace Knot , the end can be fed into the gap between the laces.

开始总结权周围环回左循环，这样，像两个环路鞋带结，年底可馈入之间的差距花边。

The aerodynamics subsystem is designed employing classical control methodology, including the inner loop which adopt angular rate feedback to stabilizing the attitude, and the outer loop which track the guidance command, and the proper emendation nets are designed for each loop.

采用古典控制理论来设计气动力控制系统，包括具有角速度反馈的稳定内回路、跟踪制导指令的外回路以及各校正环节的设计。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。