面向操纵品质评估的多状态故障选定方法

Multi State Failure Selection Method for Handling Quality Rating

操纵品质等级评估要素包括飞行包线、大气扰动和系统状态。对多状态故障进行描述,结合贝叶斯网络,提出多故障元件串并联系统的状态概率计算方法。建立操纵品质等级与飞机处于飞行包线某处、遭遇某等级大气扰动以及某系统故障的关系模型,模型反映了不同状态下飞机应满足的最低操纵品质等级。分析控制增稳系统各故障状态,计算升降舵在正常、部分故障、完全失效情况下的概率和应满足的最低操纵品质,对比得出升降舵发生只偏转25%的状态概率最小,所需满足的最低操纵品质最低。

Aircraft′s handling quality relates heavily with the states offlight envelope,atmospheric disturbance and aircraft systems.Multi-state units are discribed.A method,based on Bayesian network,calculating different probabilities of series-parallel connection systems is proposed.A relationship moddle among the handling quality rate,the probability of that the aircraft is somewhere in the flight envelope,the probability of that the encountering certain level of atmospheric disturbance and of system failure is bulit to determine the minimum handling quality rate.This method may provide basis for the selection of the list of handling quality evaluation failures.The fault states of the control stabilization system are analysised,the probability of the elevator in normal,partial failure,complete failure and the minimum maneuvering quality that should be met are calculated.The study shows that the probability of 25% deflection is the minmum,and the minimum handling quality is the lowest.