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Screw compressor rotor machining tool wear the geometric calculation method : screw compressor rotor milling and processing a grinding two methods, usually conducted in two phases processing; first stage is rough, when the workpiece to be processed about its size to the second stage of Finished, when the rotor be processed into its final size when completed.

螺杆压缩机转子加工有磨削和铣削两种方法，通常分两个阶段进行加工；第一阶段为粗加工，当工件被加工到它的大概尺寸即可；第二阶段为精加工，当转子被加工成它的最终尺寸时完成。

This method is based on the blade second-order lifting-line model, the full-span free wake model, panel model for the fuselage and rotor trim model. By iterating induced velocities on the fuselage surface caused by rotor/wake and those on the rotor plane/wake caused by fuselage, a comprehensive analytical model is established.

该方法建立在桨叶的二阶升力线模型、旋翼的全展自由尾迹模型、机身的源面元模型、旋翼的配平模型的基础上，通过迭代旋翼/尾迹在机身上的诱导速度和机身在桨盘平面、尾迹定位点的诱导速度，形成一个全耦合的综合分析模型。

Based on the nonlinear dynamical model of the rotor-bearing system with rub-impact fault, the stability of the periodic motion of the system in unbalance-rotating speed plane and rotor/stator clearance- rotating speed plane were studied by the continuation-shooting algorithm. The system periodic motion and its stability were obtained. An experimental setup was developed to investigate nonlinear vibration characteristics of such rotor bearing system.

根据碰摩转子轴承系统的非线性动力学模型，利用延拓打靶算法，在碰摩转子轴承系统不平衡量-转速和碰摩间隙-转速参数域内，研究系统的周期运动及其分岔失稳等动力学行为，得到了系统周期运动的稳定性及失稳规律；建立了研究转子轴承系统碰摩故障的实验装置，通过实验，研究了转子系统碰摩故障的非线性振动的特征。

Finally, the adaptive control strategy of active balancing for a strictly positive and real rotor with actuator saturation is successfully extended to a flexible rotor with single collocated plane and actuator saturation and a flexible rotor with multiple collocated planes and actuator saturation. A series of numerical simulations show that the proposed adaptive control law can evidently reduce the original imbalance-induced vibration of these rotors and the actuator movement asymptotically approaches to its target value, the opposite of the original imbalance.

最后，把提出的自适应控制策略成功地推广到带作动器饱和、单并置平面的柔性转子和带作动器饱和、多并置平面的柔性转子，一系列数值模拟显示：该控制律能显著减小这些转子原始不平衡引起的振动，作动器的移动能渐近收敛到与原始不平衡相反的目标值。

The rotor system of the S-56 consisted of a single five-blade seventy-two foot diameter main rotor and a four-blade, fifteen foot diameter anti-torque tail rotor.

转子系统的 S - 56构成一个单一的5叶片72英尺，直径主旋翼和一个四叶片，直径15英尺的反扭矩尾桨。

Helicopter Design Institute of China Aviation Industry deputy chief designer, AC313 helicopter designer Xu Chaoliang description, AC313 helicopter innovation embodied in the eight key technology breakthroughs: 30 minutes drive to meet the "dry run" security requirements ; fuel system and body structure to meet the anti-crash and lightning safety requirements; driver and passenger seat crashed through the anti-dynamic security testing; body structure, control systems and meet the bird impact rotor system security requirements; airborne equipment to meet the lightning and high strength radiation protection design requirements; cockpit layout to meet the crew emergency evacuation safety requirements; rotor and composite material structure to meet the fatigue assessment based on damage tolerance requirements; mechanical systems to meet the design requirements of high energy rotor burst protection.

中航工业直升机设计研究所副总设计师、AC313直升机总设计师徐朝梁介绍，AC313型直升机的自主创新具体体现在八项关键技术的突破上：传动系统满足30分钟的&干运转&安全性要求；燃油系统和机体结构满足抗坠毁及雷击安全性要求；驾驶员和乘员座椅通过抗坠毁动态安全测试；机体结构、操纵系统及旋翼系统满足鸟撞安全性要求；机载设备满足雷击和高强辐射场防护设计要求；座舱布局满足乘员应急撤离安全性要求；旋翼和复合材料结构满足基于损伤容限疲劳评定要求；机械系统满足高能转子破裂防护设计要求。

Phase-lagged cyclic boundary condition is implemented by a novel method in conjunction with the developed sliding interface technique to accurately simulate the arbitrary pitch ratio rotor/stator interaction without any modifications of the physics of the problem. It's for the first time to compose the computational area into one structured grids including both rotor/stator of centrifugal or axial turbomachinery with arbitrary pitch ratio. This method can eliminate the iteration of boundary conditions on the sliding interface and calculate the unsteady flow within rotor and stator simultaneously.

为了能够在较小的计算区域内不改变叶型而真实地反映出任意栅距比时的内部非定常流场，并避免近似仍采用相位后滞周期性条件，结合本文发展的网格技术，给出了一种新的实施方法，首次将动、静叶片数不等的离心式/轴流式叶轮机械转子、静子计算区域组合在一套结构化计算网格中，动/静叶排间的滑移界面完全按内场处理，避免了每一时层内，滑移界面处边界条件的迭代计算；并保证了每一时层，滑移界面处流动参数的守恒特性。

The effect of the stator magnetic saturation due to variation of the rotor position is considered by the scheme. Using estimated velocity of rotor corrects the rotor position.

该方法考虑了永磁转子位置变化对电动机磁路饱和的影响，采用转子转速的估算值对转子的位置角进行校正。

Stock model with a Rigid Rotor system, the fixed rotor is why it can do aerobatics.

库存模型与刚性转子系统，固定转子就是为什么它可以做的特技。

A helicopter rotor hub for use in an air-driven helicopter comprises a section of a spherical stainless steel ball attached to the end of a hollow rotor shaft.

直升机旋翼枢纽用于空气驱动直升机组成部分球形不锈钢球重视的结尾空心转子轴。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。