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首页> 外文期刊>The Aeronautical Journal >Validation of a rotorcraft mathematical model in autorotation by use of gyroplane flight tests
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Validation of a rotorcraft mathematical model in autorotation by use of gyroplane flight tests

机译：使用旋翼飞机飞行试验验证旋翼飞机在自动旋转中的数学模型

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Aircraft handling qualities in autorotation are critical in determining the level of safety of rotorcraft. For helicopters suffering from an engine failure, transcending from powered to autorotative flight occurs rapidly and requires immediate and accurate pilot reaction. Although it is important for the handling qualities in this flight state to be predicted correctly, obvious difficulties will exist in using flight tests as a means of validation when autorotation constitutes an abnormal mode of operation. In the research work presented in this paper an alternative approach is applied, of configuring a generic rotorcraft model as a gyroplane, a type of vehicle for which its main rotor is constantly in autorotation. Flight tests are used for the validation purposes both for steady state and dynamic response cases. Results are produced to complement those already existing for a dissimilar gyroplane type thus increasing the level of confidence obtained. It is concluded that important handling qualities indicators such as the steady state trends are correctly predicted although limitations are imposed due to rotor speed discrepancy.
机译：在确定旋翼航空器安全水平方面，飞机在自动旋转中的操纵质量至关重要。对于遭受发动机故障的直升机，从动力飞行到自动旋转飞行的发生迅速，需要飞行员立即做出准确反应。尽管正确预测在此飞行状态下的操作质量很重要，但是当自动旋转构成一种异常操作模式时，使用飞行测试作为验证手段将存在明显的困难。在本文提出的研究工作中，采用了一种替代方法，即将通用旋翼飞机模型配置为旋翼飞机，这是一种其主旋翼一直处于自动旋转状态的飞行器。飞行测试用于稳态和动态响应情况下的验证目的。产生的结果可以补充不同旋翼飞机类型已经存在的结果，从而提高获得的置信度。结论是，尽管由于转子速度差异而施加了限制，但可以正确预测重要的操作质量指标，例如稳态趋势。

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