标题： 组件寿命延长的负载限制控制 显示英文标题

标题： Load Limiting Control for Component Life Extension

摘要： 本文介绍了针对承受显著疲劳载荷的关键直升机部件的一种新型延长寿命控制方案的开发。主要目标是合成一种比现有文献中可用的更高效且不那么保守的延长寿命控制方案。所提出的负载限制控制（LLC）方案是一种可行的解决方案，解决了当前延长寿命控制方案所面临的一些问题，例如忽略了由载荷谐波分量引起的疲劳损伤，以及无法区分激进和非激进操作的能力。所提出的LLC方案将期望的谐波载荷限值视为限制边界，并通过计算控制裕度（CM）来重新表述载荷限制问题，该计算使用了一个限制检测和避免模块。计算出的CM作为飞行员的提示。限制检测和避免模块包括一个优化算法、一个模型预测控制器和一个计算简单的机载动态模型。进行了仿真以展示LLC方案在飞行中限制谐波桨距连杆载荷的有效性。一个重要的结果是，经过足够的训练，飞行员可以在开始跟踪任务后0.5秒内熟练地跟踪提示。 显示英文摘要

摘要： This paper presents the development of a novel life-extending control scheme for critical helicopter components subjected to significant fatigue loading. The primary objective is to synthesize a more efficient and less conservative life-extending control scheme than those currently available in the literature. The proposed Load Limiting Control (LLC) scheme is a viable solution that addresses several issues that current life-extending control schemes suffer from, such as the neglect of fatigue damage induced by the harmonic component of loads and the inability to distinguish between aggressive and non-aggressive maneuvers. The proposed LLC scheme treats desired harmonic load limits as limit boundaries and recasts the problem of load limiting as a vehicle limit by computing a Control Margin (CM) using a limit detection and avoidance module. The computed CM is used as a cue to the pilot. The limit detection and avoidance module comprises an optimization algorithm, a model predictive controller, and a computationally simple on-board dynamical model. Simulations were conducted to demonstrate the effectiveness of the LLC scheme in limiting harmonic pitch link loads during flight. One significant outcome is that, with sufficient training, the pilot can skillfully track the cue within 0.5 seconds of initiating the tracking task.