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首页> 外文期刊>Journal of Guidance, Control, and Dynamics >Adaptive Feedforward Control for Gust Load Alleviation
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Adaptive Feedforward Control for Gust Load Alleviation

机译：自适应前馈控制，减轻了阵风负荷

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摘要

In this paper, an adaptive feedforward control framework is proposed for the suppression of aircraft structuralrnvibrations induced by gust perturbations to increase the resilience of the flight control law in the presence of thernaeroelastic/aeroservoelastic interactions. Currently, aircraft with nonadaptive control laws usually include roll-offrnor notch filters to avoid aeroelastic/aeroservoelastic interactions. However, if changes in the aircraft configurationrnare significant, the frequencies of the flexiblemodes of the aircraftmay be shifted, and the notch filters could becomerntotally ineffective. With the proposed approach, the flexible modes can be consistently estimated in real time via arnproven system-identification algorithm. The identified flexible modes information is used in the proposed adaptivernfeedforward control algorithmto adjust the parametrization of the basis functions in a feedforward controller.Alongrnwith the recursive least-squares estimate, the feedforward controller is adjusted, and the structural vibration of thernaircraft induced by the gust perturbation can be largely suppressed. An F/A-18 active aeroelastic wing aeroelasticrnmodel with gust perturbation based on the linear aeroelastic solver formulation is developed as a test bed torndemonstrate the proposed adaptive feedforward control algorithm.
机译：本文提出了一种自适应前馈控制框架，用于抑制阵风扰动引起的飞机结构振动，以在存在热弹/气弹相互作用的情况下提高飞行控制律的弹性。当前，具有非自适应控制律的飞机通常包括滚降式陷波滤波器，以避免气弹/气弹相互作用。但是，如果飞机配置发生重大变化，则飞机的灵活模式的频率可能会发生变化，并且陷波滤波器可能会完全失效。通过提出的方法，可以通过经过验证的系统识别算法实时一致地估计灵活模式。所提出的自适应前馈控制算法中使用已识别的柔性模式信息来调整前馈控制器中基本功能的参数化。沿着递归最小二乘估计，对前馈控制器进行调整，并由阵风扰动引起飞机的结构振动可以大大抑制。开发了基于线性气动弹性求解器公式的带有阵风摄动的F / A-18主动气动弹性翼气动模型，作为验证所提出的自适应前馈控制算法的试验台。

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