飞行中液态水含量与水滴平均容积直径的在线辨识方法研究

结冰是飞行安全的重要隐患，液态水含量（LWC）和水滴平均容积直径（MVD）是影响结冰的重要参数，目前只能定性监测，难以满足飞机结冰防护精细化发展的需求。项目围绕LWC、MVD参数辨识中的正向物理规律以及反向计算方法两方面关键科学问题，在申请团队已获得工程应用的结冰传感器技术、数值模拟方法、结冰实验理论及技术、参数辨识等方面的研究基础上，采用理论分析、数值计算、试验台实验、冰风洞实验相结合的研究手段，开展能让辨识算法满足适定性要求的新型传感器方法、基于相似分析及冰风洞实验的传感器系统数理模型、基于“气象等参数-结冰-传感器系统”创新性短链路的辨识方法、基于测量概率和区间混合度量的不确定性问题分析方法等方面的研究。项目成果有望突破飞机结冰预警中的瓶颈问题，提高结冰监测的精度、扩展新型结冰预警方式，可为结冰后的操纵应对、高效防护、航路规划等提供技术支撑，以提高各类飞机结冰环境的安全性或作战性能。

Icing is an important hidden danger in the aircraft flying, the liquid water cotent(LWC) and the Median Volume Diameter(MVD) of droplet are two important parameters of it. Currently, they can only be monitored qualitatively, which can’t meet the demand of the refined trend of aircraft icing protection. The project focuses on two key scientific issues of forward physical laws and backward calculation methods in LWC and MVD parameter identification. The project is based on the technology of engineering application, including ice sensor technology, numerical simulation method, ice experiment theory and technology, parameter identification, etc. The research is carried out by the combination of theoretical analysis, numerical calculation, test-bed experiment and ice wind tunnel experiment. This paper mainly studies several aspects, such as the new sensor method that can make the identification algorithm meet the requirements of well posed quality, the sensor system mathematical model based on similarity analysis and ice wind tunnel experiment, the innovative short link identification method based on "meteorological parameters ice sensor system", the uncertainty analysis method based on measurement probability and interval mixed measurement, etc. The results of the project are expected to break through the bottleneck problem in aircraft icing early warning, improve the accuracy of icing monitoring, expand the new icing early warning mode, and provide technical support for the handling response, efficient protection, route planning, etc. after icing, so as to improve the safety or operational performance of various aircraft icing environments.