PD：俯仰

“Pitch Down”常简称为PD，以便在日常书写和应用中快速表达，提升沟通效率。该术语在航空航天等专业领域中使用广泛，例如美国航空航天局（NASA）在飞行器姿态控制中便频繁使用。其中文对应含义为“俯仰”，主要用于描述飞行器绕横轴旋转、机头向下倾斜的姿态变化。

Pitch Down具体释义

  • 英文缩写：PD
  • 英语全称：Pitch Down
  • 中文意思：俯仰
  • 中文拼音：fǔ yǎng
  • 相关领域： pd 美国航空航天局

Pitch Down的英文发音

例句

  1. Research on Pitch down Agility and Pitch Control Requirement at Post Stall
  2. 过失速下俯敏捷性及纵向控制效能需求研究
  3. When the nose landing gear leaves the ramp and the main landing gears do not, pitch down moment is provided by the ramp reacting force upon the main landing gears, and the pitch rate is decreased;
  4. 前轮离舰释放载荷、后轮尚未离舰的过程中，甲板支反力提供低头力矩，使离舰初期俯仰(PD)角速度减小；
  5. This paper has made an analysis, discussion and research of sudden pitch down, two engine shutdown and rapid rotation taken place in a flight test according to the successive attitude changing of Y-12 aeroplane. The riddle about this accident has been answered by auther.
  6. 本文根据Y-12飞机在一次试飞中偶然发生的突然下俯、双发停车相快速旋转等现象，按照飞机姿态变化的先后顺序进行了分析、讨论和研究，解开了一次空中遇险之谜。
  7. The larger the wing model, the farther the vortex breakdown location from leading edge leaves, whether in pitch up or in pitch down.
  8. 无论上仰或下俯，模型展宽比（翼展/洞宽）增大，三角翼模型吸力面涡破碎位置离前缘较远。
  9. In the pitch down process with reduced pitch rate k larger than 0.11, negative drag phenomena were detected at certain positive angles of attack.
  10. 当下俯无量纲角速度k≥0.11时，观测到正攻角时的负阻力现象。

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