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A review of mathematical modelling techniques for advanced rotorcraft configurations

机译：高级旋翼配置的数学建模技术综述

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The paper will review the development and application of the mathematical modelling of the advanced rotorcraft configuration, including compound helicopter configurations and tilt-rotor vehicles. The mathematical model is the basis for the design of the flight control system and an essential tool to assess the flying and handling qualities for helicopters. As the helicopter is a multi-body system, the mathematical modelling of helicopter should consider the coupling effects among motion, inertia, structure, and aerodynamics, as well as the unsteady and nonlinear characteristics, to give the physical principles and mathematical expression of each part. Therefore, the mathematical modelling of a helicopter is a process of analysing and synthesizing different hypotheses and subsystem models. Moreover, the advanced helicopter configuration puts forward higher requirements for the helicopter mathematical modelling in terms of the aerodynamic interference, blade motion characteristics, and manoeuvre assessment. The critical issues of helicopter modelling, especially the modelling of the advanced rotorcraft configurations, will be illustrated in this paper. The emphasis is put on the modelling of rotor aerodynamics and aerodynamic interaction among the rotor, fuselage, and other parts. Integrated modelling methods and the manoeuvrability investigation are also the foci of the paper. Suggestions for future research on helicopter flight dynamics modelling are also provided.
机译：本文将审查高级旋翼配置的数学建模的开发和应用，包括复合直升机配置和倾斜转子车辆。数学模型是飞行控制系统设计的基础和评估直升机的飞行和处理质量的基本工具。由于直升机是多体系，直升机的数学建模应考虑运动，惯性，结构和空气动力学以及不稳定和非线性特征之间的耦合效应，以提供每个部分的物理原则和数学表达。因此，直升机的数学建模是分析和综合不同假设和子系统模型的过程。此外，先进的直升机配置在空气动力干扰，叶片运动特性和机动评估方面对直升机数学建模提出了更高的要求。本文将说明直升机建模的关键问题，特别是先进旋翼配置的建模。重点是转子空气动力学和转子，机身和其他部件之间的转子空气动力学和空气动力学相互作用的建模。综合建模方法和机动性调查也是纸的焦点。还提供了未来直升机飞行动力学建模研究的建议。

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