Faster-than-realtime inverse simulation method for tiltrotor handling qualities investigation
Faster-than-realtime inverse simulation method for tiltrotor handling qualities investigation
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DOI：
10.1016/j.ast.2022.107516
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发表时间：
2022-03
影响因子：
5.6
通讯作者：
Ye Yuan;D. Thomson;David Anderson
中科院分区：
文献类型：
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作者：
Ye Yuan;D. Thomson;David Anderson
倾转旋翼机由于受到广泛的气动干扰和独特的控制策略，具有独特的飞行动力学特性。逆模拟提供了一个机会，研究飞行器的性能在机动飞行。本文在验证倾转旋翼机飞行动力学模型的基础上，提出了一种改进的逆仿真方法，并在代码中嵌入了自动微分（AD）方法。AD算法将加快逆模拟过程的计算速度，使其达到超实时的能力。然后，使用这种AD增强的逆仿真方法研究了XV-15倾转旋翼机在弹起机动过程中遇到的控制输入和飞行状态，并评估了该方法的实时性。结果表明，所提出的方法保证了准确性和快于实时的计算性能。最后，通过在不同的飞行状态和机动设置下执行此机动来评估倾转旋翼机的机动性。最后，计算出一个包含速度和短舱冲角的包线，以指示实现这种弹出机动的安全区域。
The tiltrotor aircraft has unique flight dynamics characteristics because of the extensive aerodynamic interference and the unique control strategy. Inverse simulation offers an opportunity to study a vehicle's performance during manoeuvring flights. In this paper, an improved inverse simulation method is developed with an Automatic Differentiation (AD) approach embedded in the code based on the verified flight dynamics model of the tiltrotor aircraft. The AD algorithm would accelerate the computational rate of the inverse simulation process and make it achieve faster-than-realtime capability. Then, the XV-15 tiltrotor's control inputs and flight states encountered during a pop-up manoeuvre are investigated using this AD-augmented inverse simulation method, and the real-time capability of this method is also evaluated. The results indicate that the proposed method guarantees both accuracy and faster-than-realtime calculation performance. Lastly, the tiltrotor's manoeuvrability is assessed by executing this manoeuvre in different flight states and manoeuvre settings. Lastly, an envelope involving the velocity and nacelle incidence angle is calculated to indicate the safety region to achieve this pop-up manoeuvre.