bar bell 中文意思是什麼
bar bell
解釋
【體育】杠鈴。-
Helicopter is hard to hover precisely for its bad stability. ordinarily, it is improved by flight control system, such like rotorcraft unmanned aerial vehicles which use bell bar or bell - hiller stabilizer bar. bell stabilizer bar, fixed across with teetering main rotor, consists of a bar and masses at two ends
貝爾穩定桿由一桿與兩質量塊組成，它與貝爾直升機的蹺蹺板旋翼垂直交叉放置，這種旋翼裝置有助於加大角速度阻尼，改善貝爾直升機的穩定性，但同時也降低了操作性。 -
This setting could increase the damping of angular rates and improve the stability. based on bell stabilizer bar, bell - hiller stabilizer bar adds small wing on the two ends of bar. compared with main blades the aerodynamic forces and moments generated by the bar could be neglected
希勒伺服旋翼在貝爾穩定桿的基礎上，于兩個質量塊處添加了小翼，與貝爾穩定桿相比，希勒伺服旋翼自身的揮舞運動藉助機械耦合引起旋翼二次變距，起到改善操縱性的作用。 -
But the variation of its aerodynamic forces will induce flapping motion and produce the cyclic pitch on the main rotor blades by the bell mixing mechanism. in order to study the effect of bell - hiller stabilizer bar on helicopter stability and control, this paper first analyze the function and the principles, give the flapping equation and a flight dynamic model with bell - hiller stabilizer bar. and then works over the stability and control of uav r - 50 in hover and cruise condition, and analyzed the influence from parameters of the bar to it
為了深入研究希勒伺服旋翼對直升機穩定性和操縱性的影響，本文首先分析了希勒伺服旋翼的功能和工作原理，推導了伺服旋翼的揮舞運動方程，建立了帶有希勒伺服旋翼直升機的飛行動力學模型，然後以yamahar - 50無人直升機為例，分析該直升機在懸停和前飛時的平衡、穩定性和操縱性，在此基礎上進一步研究希勒伺服旋翼設計參數變化對直升機穩定性和操縱性的影響。 -
With the mahjong room, billiard room, gymnasium, book bar, florist shop specially. and the gymnasium is for free and open to guests when staying in hotel, with top - grade health - care facilities such as bicycle, fitness marking time machine, dumb - bell and race apparatus
專設麻將室臺球室健身房書吧花店。能滿足不同白領客人的需求。而且健身房是對入住客人免費開放的，那裡有健身自行車健身踏步機杠鈴及跑步機等高檔健身設施。
分享友人