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首页> 外文期刊>The Aeronautical Journal >Load alleviation in tilt rotor aircraft through active control; modelling and control concepts
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Load alleviation in tilt rotor aircraft through active control; modelling and control concepts

机译：通过主动控制减轻倾斜旋翼飞机的负荷；建模和控制概念

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This paper presents the first results from research into active control of structural load alleviation (SLA) for tiltrotor aircraft carried out in the European 'critical technology' RHILP project. The importance of and the need for SLA in tiltrotors are discussed, drawing on previous US experience reported in the open literature. The paper addresses the modelling aspects in some detail; hence forming the foundation for both the FLIGHTLAB simulated XV-15 and EUROTILT configurations. The primary focus of attention is the suppression of in-plane rotor yoke loads for pitch manoeuvres in airplane mode; without suppression these loads would result in a very high level of fatigue damage. Multi-variable control law design methods are used to develop controller schemes and load suppression of 80-90% is demonstrated using rotor cyclic control, albeit at a 20-30% performance penalty. However, rotor flapping transients tend to increase by the action of the SLA system. A dual-objective control design approach demonstrates the effectiveness of suppressing both loads and flapping simultaneously.
机译：本文介绍了在欧洲“关键技术” RHILP项目中对主动旋翼飞机减轻结构载荷（SLA）进行主动控制研究的第一个结果。讨论了倾斜转子中SLA的重要性和需求，并参考了公开文献中报道的美国以往经验。本文详细介绍了建模方面的内容。因此，为FLIGHTLAB模拟XV-15和EUROTILT配置奠定了基础。注意的主要焦点是在飞机模式下抑制俯仰操纵的平面内转子轭负载。如果不加以抑制，这些载荷将导致非常高的疲劳损伤。使用多变量控制律设计方法来开发控制器方案，并使用转子循环控制演示了80-90％的负载抑制，尽管性能损失为20-30％。但是，转子拍打瞬变倾向于通过SLA系统的作用而增加。双目标控制设计方法证明了同时抑制载荷和拍打的有效性。

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