• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the American Helicopter Society >Instability Mechanism of Roll/Lateral Biodynamic Rotorcraft-Pilot Couplings
【24h】

Instability Mechanism of Roll/Lateral Biodynamic Rotorcraft-Pilot Couplings

机译：侧倾/侧向生物动力旋翼飞机-驾驶员联轴器的失稳机理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The paper investigates the basic mechanism of aeroservoelastic pilot-assisted oscillation about the roll axis due to the interaction with pilot's arm biomechanics. The motivation stems from the observation that a rotor imbalance may occur as a consequence of rotor cyclic lead-lag modes excitation. The work shows that the instability mechanism is analogous to air resonance, in which the pilot's involuntary action plays the role of the automatic flight control system. Using robust stability analysis, the paper shows how the pilot's biodynamics may involuntarily lead to a roll/lateral instability. The mechanism of instability proves that the pilot biodynamics is participating in the destabilization of the system by transferring energy, i. e., by producing forces that do work for the energetically conjugated displacement, directly into the flapping mode. This destabilizes the airframe roll motion, which, in turn, causes lead-lag motion imbalance. It is found that, depending on the value of the time delay involved in the lateral cyclic control, the body couples with rotor motion in a different way. In the presence of small or no time delays, body roll couples with the rotor through the lead-lag degrees of freedom. The increase of the time delay above a certain threshold modifies this coupling: The body no longer couples with the rotor through lead-lag but directly through flap motion.
机译：本文研究了由于与飞行员手臂生物力学相互作用而产生的气动弹性飞行员辅助横摇轴振动的基本机理。动机源于以下观察结果：转子周期性超前-滞后模式励磁可能会导致转子不平衡。这项工作表明，不稳定机制类似于空气共振，其中飞行员的非自愿行为起着自动飞行控制系统的作用。使用稳健的稳定性分析，本文显示了飞行员的生物动力学可能会如何不由自主地导致侧倾/侧向不稳定。不稳定机制证明，先导生物动力学通过传递能量（即能量）参与系统的不稳定。例如，通过产生对能量共轭位移起作用的力，直接进入拍打模式。这使机身侧倾运动不稳定，进而导致超前-滞后运动不平衡。已经发现，取决于横向循环控制中涉及的时间延迟的值，主体以不同的方式与转子运动耦合。在存在很小或没有时间延迟的情况下，车身侧倾通过超前-滞后自由度与转子耦合。超过特定阈值的时间延迟增加会改变这种耦合：主体不再通过超前滞后与转子耦合，而是直接通过襟翼运动与转子耦合。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号