【24h】

A Bistable Mechanism for Chord Extension Morphing Rotors

机译:弦延伸变形转子的双稳态机制

获取原文
获取原文并翻译 | 示例

摘要

Research efforts have shown that helicopter rotor blade morphing is an effective means to improve flight performance. Previous example of rotor blade morphing include using smart-materials for trailing deflection and rotor blade twist and tip twist, the development of a comfortable airfoil using compliant mechanisms, the use of a Gurney flap for air-flow deflection and centrifugal force actuated device to increase the span of the blade. In this paper we explore the use of a bistable mechanism for rotor morphing, specifically, blade chord extension using a bistable arc. Increasing the chord of the rotor blade is expected to generate more lift-load and improve helicopter performance. Bistable or "snap through" mechanisms have multiple stable equilibrium states and are a novel way to achieve large actuation output stroke. Bistable mechanisms do not require energy input to maintain a stable equilibrium state as both states do not require locking. In this work, we introduce a methodology for the design of bistable arcs for chord morphing using the finite element analysis and pseudo-rigid body model, to study the effect of different arc types, applied loads and rigidity on arc performance.
机译:研究表明,直升机旋翼叶片变形是提高飞行性能的有效手段。转子叶片变形的先前示例包括使用智能材料进行尾随偏转以及转子叶片扭曲和叶尖扭曲,使用顺应机构开发舒适的机翼,使用格尼襟翼进行气流偏转以及离心力致动装置的增加刀片的跨度。在本文中,我们探索了使用双稳态机制进行转子变形的方法,特别是使用双稳态弧的叶片弦长扩展。预计增加旋翼桨叶的弦将产生更大的升力载荷并改善直升机的性能。双稳态或“直通”机构具有多个稳定的平衡状态,并且是实现大促动输出冲程的新颖方式。双稳态机制不需要能量输入来维持稳定的平衡状态,因为两种状态都不需要锁定。在这项工作中,我们介绍了一种使用有限元分析和伪刚体模型设计用于弦变形的双稳态弧的方法,以研究不同弧类型,施加的载荷和刚度对弧性能的影响。

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