查询词典 magnetic bearing

Based on the function and reliability, the design principle for thepermanent magnetic bearing in rotating machine is put forward. FailureMode Effect and Criticality Analysis is studied for thepermanent magnetic bearing, and corresponding designs for magneticbearing are made to enhance the reliability. In addition, the main failuremode and failure causes are found by FMECA, it is found that theadditional alternate magnetic field within the machine causing thepermanent magnet to demagnetize is the main failure mode of thepermanent magnetic bearing in rotating machine.

本文提出了基于功能和可靠性的旋转机械永磁轴承的设计原理，对旋转机械永磁轴承进行了失效模式影响及危害度分析，并相应地提出可靠性设计措施，以提高永磁轴承的可靠性，同时通过FMECA找出了影响永磁轴承可靠性的主要失效模式及失效因素。

The results show that the linear controller described in this paper is effective to control magnetic bearing. Also it offers a theoretical support for design and impletion of magnetic bearing.

仿真结果表明：利用给出的线性控制器可实现电磁轴承的有效控制，该研究为简化电磁轴承控制系统的设计与实现提供了理论依据。

Then, the isotropy of the magnetic bearing supporting to the rotor is proved by the static magnetic field analysis and the linear stiffness is calculated.

在此基础上，建立了磁力轴承-转子系统的动力学方程，用有限元法计算了高速电机转子的临界转速。

Nanjing University of Aeronautics and Astronautics,Nanjing,210016Switching power amplifier of magnetic bearing was a nonlinear system.The performance of the switching power amplifier affected the stability of the magnetic bearing control system.A way of establishing the closed-loop system model of magnetic bearing was presented.

磁悬浮轴承开关功率放大器系统为一非线性系统，开关功率放大器的性能影响磁悬浮轴承控制系统的稳定性，为此，提出了一种建立磁悬浮轴承开关功率放大器系统模型的方法。

The research results have shown that the configuration of the magnetic bearing reduces overall system size, and has high efficiency. The axial and radial suspension forces have great linearity. The symmetrical characteristic strenuously, and movement of every degree of freedom around balanceable position has no coupling and the control flux of every degree of freedom is independent. It is beneficial to simplify and design the controller and the circuit power amplifier. The magnetic bearings operate stably with decentralized PID controllers.

研究结果表明：这种磁轴承结构合理紧凑，效率高；磁轴承轴向、径向悬浮力具有较好的线性和对称性，有利于控制器及功放电路的简化与设计，并获得良好的拉制性能；各自由度运动和磁路几乎没有耦合，采用分散独立的PID控制器实现了磁轴承的稳定工作。

The calculation method of the shape dimensions of the magnetic circuit and the winding parameters for axial magnetic bearing is given .

介绍了电磁主动控制型磁浮轴承的原理和结构，对其中的轴向磁轴承的结构和电磁参数设计方法进行了分析，给出了计算实例。

For the analysis of both static and dynamic characteristics, the additional moments, axial/radial coupled stiffness coefficients and the radial/radial coupled stiffness coefficients are taken into account Based on it, the influences of the bearing angle, the ratio of width to diameter, and the ration of magnetic polar angle on the static and dynamic characteristics conical magnetic bearing are analyzed, and the corresponding numerical results are presented.

在圆锥电磁轴承基础解的计算模型中，增加了轴承附加力矩、力矩刚度系数以及轴向/径向、径向/径向耦合刚度系数的计算。在此基础上，本文详细讨论了圆锥电磁轴承锥角、宽径比以及磁极角比对轴承静、动特性的影响，并给出了数值结果。

Design a uniform magnetic field of magnetic bearing test system, and in accordance with the output to meet the requirements of the bearing samples.

设计出一种磁悬浮轴承磁场均匀性测试系统，并根据系统的输出选择符合要求的轴承样品。

The current and displacement stiffness are analysed toward radial magnetic bearing and thrust magnetic bearing with differential driving mode. The effects of current and displacement stiffness on AMB system are studied in order to ensure it stable operation.

以实际应用的电磁径向轴承和推力轴承为研究对象，从理论上详细分析差动激磁方式作用下的位移刚度和电流刚度的特性，探讨位移刚度和电流刚度对系统性能的影响。

The study of magnetic bearings can be divided into two parts: the study of control system for magnetic bearing and the study of structure of magnetic bearing.

这一课题的研究内容可以分为磁轴承的结构研究和磁轴承的控制系统研究两大部分。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了