动平衡

The results show that the equiaxed zone ratio of the casting billet is greatly increased,with its soidification structure is obviously improved,and the momentum values of the electromagnetic forces both parallel to and perpendicular to the direction of the traveling magnetic field pulsate periodically with time.

采用三相通入不同电流的非平衡线性电磁搅拌技术进行了铸坯的静态浇铸实验，并对电磁搅拌过程中钢液内的电磁力各分量的瞬时值进行了理论分析·结果表明，当采用将电磁搅拌器的三相通入不同电流的非平衡线性电磁搅拌时，在钢液内所产生的电磁力是脉动的，其大小呈周期性变化，尤其是垂直于磁场运动方向上的电磁力，其脉动的幅度很大·由此认为，当采用将搅拌器的三相通入不同电流的非平衡线性电磁搅拌时，所产生的垂直于磁场运动方向上的脉动电磁力是提高等轴晶比率，改善铸坯凝固组织的一个重要原

The advantages and disadvantages of balanced truncation, singular perturbational method and generalized singular perturbation are analyzed. A quasi-generalized singular perturbational model reduction method is proposed.

分析了平衡截断法、平衡奇异摄动法和广义平衡奇异摄动法存在的优缺点，提出了一种近似广义奇异摄动模型降阶算法。

When the flow through the balance of the piston damping the flow of holes increases, the balance of the piston, the next increase in pressure on both sides of a balanced increase in the distance the piston increases, and vice versa reduced; and also because the spring stiffness is very small, so that shift the balance of the piston pressure required very few changes, so the flow through the Poppet head is not much change, so the first opening Poppet very few changes, to mention the pressure of moving the first opening can be said to remain unchanged, that is, when the pilot valve spring after a set, Poppet Head was opened, the balance piston chamber pressure remained basically unchanged.

当流经平衡活塞上阻尼孔的流量增加时，平衡活塞上、下两侧的压差增加，平衡活塞上升距离增加，反之则减小；又因为弹簧的刚度很小，使平衡活塞上移所需压差变化很小，所以通过提动头的流量变化也不大，因此提动头的开口变化很小，提动头开启的压力可以说是不变的，亦即当先导阀的弹簧一经设定后，提动头被打开时的平衡活塞上腔的压力基本保持不变。

The contents of this dissertation are involved in studies on quasi steady-state condition of a slow speed-varying rotor system, gain-scheduling control of a quasi steady-state rotor active balancing system, adaptive control of active balancing for a fast speed-varying rotor with actuator time delay and adaptive control of active balancing for a fast speed-varying rotor with actuator saturation. The rotors to be studied include a Jeffcott rotor, a Jeffcott rotor with anisotropic bearings, a flexible rotor with single collocated balancing plane (actuator plane and measuring plane are almost the same one) and a flexible rotor with multiple collocated balancing planes.

研究的内容涉及慢变速转子的准稳态条件、变速准稳态转子主动平衡系统的增益调度控制、带作动器时迟的快变速转子主动平衡系统的自适应控制与带作动器饱和的快变速转子主动平衡系统的自适应控制，转子类型包括Jeffcott转子、轴承各向异性的Jeffcott转子、单并置平衡平面(作动器和测量平面几乎在同一个平面)的柔性转子和多并置平衡平面的柔性转子。

I produced this technology has been applied to fan dynamic balancing machine, electrical, air conditioning, internal combustion engine, aerospace, metallurgy, textile, printing, steam and other security areas, and the vast majority of clients in order to set up a good long-term cooperative relations, well received by the user's trust.

我公司生产的此项技术动平衡机已应用于风机，电机，空调，内燃机，航空航天，冶金，轻纺，印刷，汽保等各领域中，从而和广大客户建立了良好的长久合作关系，深受广大用户的信赖。

Our factory own all type of producing equipments such as spline milling machine,move-balance examination machine, almighty milling machine, boring lathe slotting machine, lathe, planer, drill press, grinder.

本厂现有花键铣床、动平衡试验机、万能铣床、镗床、插床、车床、刨床、钻床、磨床等各种规格型号生产设备，2001年生产销售万向联轴器总额超千万元，生产的Φ36~Φ635各规格万向联轴器已广泛运用于各设备传动系统上。

Improved roller grinder system for nip roller with digital controller , multitypes groove on roller surface, irregular rubber rollers and dynamic balance machine.

公司又扩大项目投资，积极采用新技术，更新了橡胶硫化仪和橡胶电性能测试仪器，进一步完善了胶辊曲面中高数控加工系统、辊面槽纹等异型产品加工装置和静、动平衡检测设备。

In order to adjust the request, the major problem is that, the dynamic balancing of the Rice mill shaft is not resolved.

要达到以上要求，对于国产碾米机最主要的问题之一就是碾米机主轴的动平衡问题。

So based on the kinetic analysis of the Rice mill shaft, to resolve the dynamic balancing problem, it has very important theory and practicality signification for the rice mill manufacturing.

因此，对碾米机主轴部件进行动力学分析，解决碾米机的动平衡问题，对我国的碾米机制造业有着重要的理论意义和实用价值。

Experiments on the grinding wheel and the rotor test rig are carried out, whichhave validated the procedure.

实验表明，本文所建立的方法是有成效的，可用于转子现场动平衡。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。