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THE CROSS-COUPLING PROBLEM OF HELICOPTER ROTORS - A REVIEW

机译：直升机转子的交叉耦合问题－综述

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Until recently it was beyond the capability of helicopter rotor models to predict correctly the cross-coupling response. During the mid-nineties it became clear that wake distortion effects are the main contributors to the cross-coupling response. Wake distortion effects can be modeled by using detailed free or prescribed wake models. However, these models require large computer resources and long computing times, thus they are not suitable for various applications. In such cases dynamic-inflow models can be corrected to account for the missing effect, by using the. wake distortion coefficient or an aerodynamic phase lag. Recently, a new actuator disk model was developed where the wake distortion effect is obtained as an integral part of the derivation. In the paper all the methods of considering the wake distortion effects are reviewed and compared. The results of the various models are also compared to flight test results. Conclusions are drawn and further necessary research is identified.
机译：直到最近，直升机旋翼模型还无法正确预测交叉耦合响应。在九十年代中期，很明显，尾波失真效应是交叉耦合响应的主要贡献者。可以使用详细的自由或指定的唤醒模型来模拟唤醒失真效应。但是，这些模型需要大量的计算机资源和较长的计算时间，因此不适用于各种应用程序。在这种情况下，可以使用校正动态流入模型以解决缺失的影响。尾流畸变系数或空气动力学相位滞后。最近，开发了一种新的致动器盘模型，其中获得了尾流失真效应作为推导的组成部分。在本文中，所有考虑尾流失真效应的方法都进行了回顾和比较。还将各种模型的结果与飞行测试结果进行比较。得出结论并确定进一步必要的研究。

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