Modelling for couplings of an airframe—propulsion integrated hypersonic vehicle with engine safety boundaries
Modelling for couplings of an airframe—propulsion integrated hypersonic vehicle with engine safety boundaries
复制标题
DOI：
10.1243/09544100jaero618
复制
发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
Ziyun Yao;W. Bao;J. Chang;D. Yu;J. Tang
中科院分区：
文献类型：
--
作者：
Ziyun Yao;W. Bao;J. Chang;D. Yu;J. Tang
本文建立了一种具有不同发动机安全边界的机体-推进一体化高超声速吸气式飞行器（HIT-HAV）的耦合动力学模型，用于分析飞行动力学、气动、推进和控制之间的耦合。这些发动机安全边界包括进气道不起动边界、燃烧器壁面温度极限、燃烧器贫燃边界、富燃边界等，这些边界都在HIT-HAV模型中得到了考虑。通过与全尺寸通用高超声速飞行器的对比，验证了该模型的有效性和实用性。通过对HIT-HAV模型的仿真分析，得出由于飞行动力学、气动力学、推进系统和控制系统之间的耦合，机体-推进系统一体化高超声速吸气式飞行器可能在正常工作模式以外的安全边界附近甚至超过安全边界，导致飞行失败的结论。仿真结果表明，通过限制燃料供给可以避免吸气式高超声速飞行器的不安全工作模式。研究表明，对于具有不同发动机安全边界的机体-推进一体化高超声速吸气式飞行器，由于不同发动机安全边界所要求的工作模式不同，传统意义上的飞行控制和推进控制相互独立已不能满足高超声速吸气式飞行的要求，多模式控制设计应是未来研究的重点。
Abstract A model for coupled dynamics of an airframe—propulsion integrated hypersonic air-breathing flight vehicle with various engine safety boundaries, called HIT-HAV (Harbin Institute of Technology), was developed to analyse the couplings among flight dynamics, aerodyna-mics, propulsion, and control. These engine safety boundaries included inlet unstart boundary, burner wall temperature limitation, burner lean fuel combustion boundary, rich fuel combustion boundary, and so on. All these engine safety boundaries were considered in modelling the HIT-HAV. The validity and practicability of the model were verified by comparing with a full-scale generic hypersonic vehicle. By simulating the HIT-HAV model, the conclusion was drawn that due to the couplings among flight dynamics, aerodynamics, propulsion, and control, the airframe—propulsion integrated hypersonic air-breathing flight vehicle may operate, beside the normal operation mode, near some safety boundaries and may even exceed them, which may cause a failure flight. A hypersonic air-breathing flight vehicle's un-safety operation mode could be avoided by limiting the fuel supply, which has been verified in simulations. This paper indicates that for an airframe—propulsion integrated hypersonic air-breathing flight vehicle with various engine safety boundaries, as there were various relevant operation modes requested by various engine safety boundaries, an independent flight control and propulsion control in the traditional sense would fail to satisfy the hypersonic air-breathing flight and hence a multi-mode control design should be the focus of future research.