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- Simulation calculations show the effectiveness of suppressing “ground resonance” of helicopter by the methods mentioned. 仿真计算表明了这些方法对抑制直升机“地面共振”的有效性。
- An analytical method of ground resonance dynamic stability countering the helicopters with ski landing gears is provided. 针对滑橇式起落架直升机,提供了一种“地面共振”动力稳定性分析的方法。
- The semi-active control of helicopter ground resonance by using magneto-rheological (MR) damper has been investigated in this thesis. 本文研究了应用磁流变阻尼器的直升机“地面共振”半主动自适应控制问题。
- The method of eigenvalue analysis is used to investigate the ground resonance stability of the helicopter rotor/body coupled system with two connections of dampers. 采用特征分析法计算了两种减摆器连接形式的直升机地面共振稳定性。
- The fox went to ground under a rocky escarpment. 狐狸钻进了石崖下面的洞里。
- Optimal Output Feedback Control for "Ground Resonance" of Helicopter 直升机“地面共振”的输出反馈最优控制
- The ground was covered with ferns. 地面上长满了羊齿植物。
- He lifted a pail of water from the ground. 他把一桶水从地上提了起来。
- Rachel who died last week was still above ground. 雷切尔上星期去世,现在还没安葬。
- This car really comes into its own on rough ground. 这辆汽车在颠簸的路上才真正显示出它独特的性能。
- They put some wreathes on the ground. 他们把一些花环放在地上。
- The ground was ploughed and planted with corn. 地翻耕后种上了玉米。
- He takes his ground on intuition. 他的意见是凭直觉。
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- A good hot summer could dry the ground out. 一个炎热的夏天可以将大地干透。
- Bob pecked at the hard ground with a pickaxe. 鲍勃用鹤嘴锄在坚硬的地面上挖掘。
- The fence posts were fixed firmly in the ground. 栅栏的立柱牢牢地固定在地上。
- The ground is shut in by a wire fence. 那块地被铁丝篱笆围住。
- Last winter the snow lay thick on the ground. 去年冬天,地上积雪很厚。
- His fist sent the robber sprawling on the ground. 他一拳把那抢劫犯打得四脚朝天。