阵风减缓系统传感器失效影响研究

阵风减缓系统可以有效降低机翼的阵风载荷,然而由于系统本身以及失效模式中存在大量不确定性,极大地增加了设计和审定的复杂程度。通过蒙特卡洛方法研究了阵风减缓系统传感器卡死失效的影响,考虑阵风输入和失效传感器的不确定性,以通用运输机模型为算例,分别在时域和频域内对1-cosine离散阵风和冯·卡门谱连续湍流的翼尖加速度响应进行了仿真计算,给出了在系统正常工作和失效时翼尖加速度最大/最小值以及功率谱密度均方根的概率分布。为阵风减缓系统的适航符合性验证及审定中系统失效影响分析提供了指导方法和技术支持。

Study on sensor failure of gust alleviation system

Gust alleviation system (GAS) could effectively reduce the gust load of the wings.Because of the system itself and large uncertainty, the complexity of design and certification will be significantly increased.The effect of gust alleviation system sensors failure is studied with the Monte Carlo method.Considering the uncertainty gust input and stuck failure, with the transport aircraft model as an example, wing-tip acceleration response of 1-cosine discrete gust and Von Karman spectrum were simulated in time-domain and frequency-domain, which gave the max/min value of wing-tip acceleration and the distribution of probability power spectrum density root mean square.This study will provide the guidance and technical support for airworthiness certification and system failure effect analysis in certification.