结冰条件下直升机飞行风险模糊综合评估

Fuzzy Comprehensive Evaluation of Helicopter Flight Risk under Icing Conditions

目的提高结冰条件下直升机的飞行安全,对飞行风险进行评估。方法基于模糊综合评估方法,综合考虑结冰气象条件、防/除冰系统状态和飞行员经验的影响,建立飞行风险评估方法。通过算例对建立的飞行风险评估方法进行了验证分析。结果基于结冰强度确定了飞行风险4级划分方法,利用层次分析法(AHP)确定各因素的权重,采用正态分布隶属函数建立评估矩阵,对权重集和评估矩阵进行加权平均运算,并对评估结果向量进行处理以给出最终的风险等级。结论该方法具有科学性和实用性。

The work aims to improve the flying safety of helicopter under icing conditions and evaluate the flight risks.A flight risk evaluation method was established based on the fuzzy comprehensive evaluation method,which took the effects of icing weather conditions,anti-icing/de-icing system status and pilot experience level into consideration.Based on the icing strength,the 4-level flight risk classification method was established.The weight of each factor was determined by analytic hierarchy process.Then,the normal distribution membership function was used to establish the evaluation matrix.The weighted average method was used to the weight set and the evaluation matrix.The evaluation result vector was processed to classify the final flight risk.The method was reasonable and feasible.