小阀

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动，导致管路疲劳损伤的问题，针对管路中存在压力驻波特性，在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点，提出了一种分布式流体脉动主动控制方法，即沿管路不同位置布置多个主动消振阀和误差压力传感器，在任意飞行阶段，避开压力驻波点，以误差压力传感器的脉动测量值为控制目标，采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波－X LMS算法，调整控制器参数，使主动消振器产生的次级脉动与管路中的初始脉动相互抵消，达到整个管路中的平均流体脉动最小的效果。

It indicates that the changes of threshold voltage and the gradient are related to the display stability of LCD,whose display contr...

经分析得出：在60～100 Hz区间，所测试的液晶光阀陡度随频率变化相对较小，显示特性较稳定。这为设计液晶显示器件，提高其显示稳定性提供了依据。

Needle valve-shaped than other types of valves that can withstand greater pressure, sealing performance, it is generally used for small flow high pressure gas or liquid media sealing.

针型阀形比其他类型的阀门能够耐受更大的压力，密封性能好，所以一般用于较小流量，较高压力的气体或者液体介质的密封。

Use of smaller inside diameter flange connections may result in obstruction and damage to the valve disc and seat.

如果采用的法兰连接装置的内部直径较小，则可能导致阀门阀瓣和阀座的阻塞和损坏。

The outlet of the introduction passage is located closer to the valve plate than to the wall of the suction chamber.

导入通道出口与阀片的距离比与吸入腔壁的距离小。

A new three-way two-position pneumatic valve measures just 8 X 9 X 23 mm--about half the size of today's smallest valves Globe Valves with similar flow capabilities.

一种新三路，二位气动阀尺寸仅为8× 9 × 23毫米-一半，今天的最小流量的功能篮倨阀门的大小。

A new three-way, two-position pneumatic valve measures just 8 X 9 X 23 mm--about half the size of today's smallest valves Globe Valves with similar flow capabilities.

一种新三路，二位气动阀尺寸仅为8× 9 × 23毫米-一半，今天的最小流量的功能类似阀门的大小。

The check valves shall utilize a single torsion spring design to minimize pressure drop through the assembly.

这种止回阀应该采用单扭力弹簧结构来将通过总成的压降减到最小程度。

Low Open and Close Force with Zero leakageValve shaft uses thrust bearings and "O" shaped seal ring to reduce friction, and stuffing box's leakage problem is also solved.

启闭力小，无外漏阀杆采用止推轴承和&O&型圈密封，减少了开关时的摩擦力，解决了填料箱漏水问题。

There is another even smaller housing above that, which may or may not be interconnected with the reversing lever- possibly it contained a stop valve.

另外还有一个更小的房屋之上，这可能是也可能不是相互关联的与扭转杠杆可能载有停止阀。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。