查询词典 instantaneous angular velocity

Then through dynamical analysis, every instantaneous acceleration distributing of slope under dynamical earthquake can be got too. According to this result, adding earthquake force to structure by way of inertial force, this paper analyses the slope stabilization by using FEM strength reduction method and gains every instantaneous safety factor and its corresponding slide. Curves of safety factors versus duration can be made by curvefitting. By safety factors versus duration curves and slides, we can value structure's quakeproof stabilization and point its slide out. By these principles, programs of FEM stabilization analysis for each moment are organized.

首先通过三维非线性有限元静力分析得到动力分析的初始应力，再进行动力分析得出边坡在动力作用下每一瞬时的加速度分布，根据每一瞬时的加速度分布的结果，将地震作用力作为惯性力加在结构上，用有限元强度折减法进行边坡稳定分析，得出在地震动力作用下每一瞬时的安全系数及对应滑裂面，拟合可得到一条安全系数随时间变化的曲线，根据这条安全系数时程曲线及滑裂面，综合得出结构的抗震稳定安全系数及对应的滑裂面。

Therefore, a new theory of space vector reactive power is presented in this dissertation, where instantaneous reactive current and instantaneous active current are defined, based on the new theory.

作为治理电网污染、提高电网稳定性和改善电能质量的一项关键技术，有源滤波技术已成为电力电子技术应用中的一个比较新的研究课题。

In the dq0 coordinates a new definition of generalized instantaneous reactive current is proposed, and methods of resolution and measurement of generalized instantaneous reactive current components are also presented.

瞬时无功功率和瞬时无功电流定义是快速无功补偿和有源滤波的理论基础，本文提出了在dqO坐标下广义瞬时无功电流的新定义，并给出了广义瞬时无功电流各分量的分解方法和测量方法。

Based on instantaneous power analysis, an instantaneous power control method of permanent magnet synchronous machine is proposed in this paper.

基于对电机输入瞬时有功无功功率的分析，提出一种新的永磁同步电机瞬时功率控制方案。

Furthermore we put forward the conception of instantaneous power and instantaneous excitation inductance.

最后针对变压器保护的特殊性，提出了利用模糊理论来实现变压器的保护逻辑。

In order to measure instantaneous rotation speed, the rotation speed of the shaft in the spatial coordinate system is investigated and the measurement model for measuring instantaneous rotation speed of rotation mechanism is proposed.

为了测量瞬时转速，对旋转体转速在空间坐标系中的关系进行了研究，并建立了旋转机械瞬时转速测量模型。利用线阵CCD技术设计了一种新型光学瞬时转速测量系统。

In the process, the instantaneous speed of the drive system is higher than the instantaneous synchronous speed because of the inertia of the drive system.

为 了使拖动系统停止，逐渐减小频率；此时，由于惯性的缘故拖动系统的瞬时速度比同步瞬时速度要高。

Are there ways to measure instantaneous speed directly, or is instantaneous speed always a value that must be derived from average speed measurements?

有没有方法可以直接测量瞬时速度，或者是否瞬时速度总要由平均速度的测量值求导得出？

We design a fast calculating amplitude method: obtain two instantaneous voltages at first, after that calculate the current voltage virtual value once we get another instantaneous voltage.

我们设计了一种快速计算幅值的方法，只需先采得两个电压瞬时值，之后每采样一个电压瞬时值即可求得当前的电压幅值。

Two non-polar molecules near to a certain extent, they are the instantaneous dipole moment of mutual influence, so that each molecule of electronic Clouds tend to side, the nuclear bias on the other side, that is, two molecules each polarization, resulting in the instantaneous induced electric dipole moment.

两个无极分子靠近到一定程度，它们的瞬时偶极矩相互影响，使每个分子的电子云偏向一侧，核偏向另一侧，即两个分子互相极化，产生瞬时诱导电偶极矩。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。