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Maneuverability Assessment of a Compound Helicopter Configuration

机译：复合直升机构型的机动性评估

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The compound helicopter design could potentially satisfy the new emerging requirements placed on the next generation of rotorcraft. The main benefit of the compound helicopter is its ability to reach speeds that significantly surpass those of the conventional helicopter. However, it is possible that the compound helicopter design can provide additional benefits in terms of maneuverability. The paper features a conventional helicopter and a compound helicopter. The conventional helicopter features a standard helicopter design with a main rotor providing the propulsive and lifting forces, while a tail rotor, mounted at the rear of the aircraft, provides the yaw control. The compound helicopter configuration features both lift and thrust compounding. The wing offloads the main rotor at high speeds, and two propellers provide additional axial thrust as well as yaw control. This study investigates the maneuverability of these two helicopter configurations using inverse simulation. The results predict that a compound helicopter configuration is capable of attaining greater load factors than its conventional counterpart, when flying a pullup-pushover maneuver. In terms of the accel-decel maneuver, the compound helicopter configuration is capable of completing the maneuver in a shorter time than the conventional helicopter, but at the expense of greater installed engine power. The addition of thrust compounding to the compound helicopter design reduces the pitch attitude required throughout the acceleration stage of the maneuver.
机译：复合直升机的设计可能会满足对下一代旋翼飞机提出的新要求。复合直升机的主要优点是能够达到远远超过传统直升机的速度。但是，复合直升机的设计可能会在机动性方面提供其他好处。本文介绍了常规直升机和复合直升机。传统的直升机采用标准的直升机设计，其主旋翼提供推进力和升力，而安装在飞机后部的尾旋翼则提供偏航控制。复合直升机配置具有升力和推力复合功能。机翼可高速卸载主旋翼，两个螺旋桨可提供额外的轴向推力以及偏航控制。本研究使用逆向仿真研究了这两种直升机配置的可操纵性。结果预测，在进行上拉-俯冲演习时，复合直升机配置能够获得比传统直升机更大的负载系数。就加速-减速机动而言，复合直升机配置能够比传统直升机在更短的时间内完成机动，但是以更大的发动机功率为代价。复合直升机设计中增加了推力复合，从而降低了整个机动加速阶段所需的俯仰姿态。

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