飞机冲压空气涡轮系统的动态特性分析

冲压空气涡轮是飞机能源失效时使用的关键应急系统。首先依据冲击空气涡轮（RAT）工作原理确定其物理架构；然后对涡轮部件、能源转换装置、展开装置和展开随动机构等4个主要部件进行力学分析，建立各部件的力学方程组。依据该力学方程组，建立涉及力学、液压、刚体动力学的多学科冲压空气涡轮系统模型。使用该模型仿真了某真实系统在不同工况和设计参数下的动态特性，研究了关键设计参数对系统性能的影响，为冲压空气涡轮系统正向设计提供依据。最终，某型冲压空气涡轮系统风洞试验数据验证了所提系统模型的准确性。

Analysis of dynamic behavior of aircraft ram air turbine system

The ram air turbine system is a commonly used airborne auxiliary power system for emergency situations. Aiming at the Ram Air Turbine (RAT) system, the physical architecture is firstly constructed based on the working principle. On the basis of the physical architecture, the mechanical analysis is conducted for turbine, energy conversion unit, actuator, and deployment mechanism components. Finally, based on the mechanical equations, a multidisciplinary model of the RAT involving mechanics, hydraulics and multi-body dynamics is built. This system model is used to simulate the dynamic behaviors under different working and design conditions and the influences on performances of key design parameters were studied for forward design procedure. Finally, the results of a wind tunnel test verified the accuracy of the system model.