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首页> 外文会议>Congress of the International Council of the Aeronautical Sciences; 20060903-08; Hamburg(DE) >SIMULATION OF FLUID MECHANICAL AIRCRAFT SYSTEMS FROM CONCEPT EVALUATION TO QUALIFICATION TESTS
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SIMULATION OF FLUID MECHANICAL AIRCRAFT SYSTEMS FROM CONCEPT EVALUATION TO QUALIFICATION TESTS

机译：从概念评估到鉴定测试的流体力学飞机系统仿真

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This paper gives an overview of the modelling and simulation work for the military aircraft JAS 39 Gripen's fuel system. Fuel systems have several modelling challenges such as both compressible air and less compressible fuel that give stiff differential equations, g-forces effects, nonlinear cavitation and saturation. It is also a complex system that requires a model with integrated system software. Dynamic models based on physical differential equations have generally been used. The modelling work has been done in Easy5. Simulations have been done during the whole development cycle of the aircraft from concept evaluation to qualification tests. The paper gives some examples from the simulations where system performance and the internal states of the system are calculated. Finally, the paper focuses on numerical instability of fuel systems.
机译：本文概述了军用飞机JAS 39 Gripen的燃油系统的建模和仿真工作。燃料系统面临多种建模挑战，例如可压缩空气和难压缩燃料，这些问题都会带来刚性微分方程，重力作用，非线性空化和饱和。它也是一个复杂的系统，需要带有集成系统软件的模型。通常使用基于物理微分方程的动态模型。建模工作已在Easy5中完成。从概念评估到资格测试，整个飞机开发周期都进行了仿真。本文从仿真中给出了一些示例，其中计算了系统性能和系统内部状态。最后，本文着重于燃料系统的数值不稳定性。

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