某型机飞控系统“双通道故障”、俯仰方向振荡问题分析与定位研究

某型机在左转弯下降高度过程中突发飞控系统"双通道故障",飞行员在改平姿态过程中飞机出现了俯仰方向增幅振荡现象,飞参数据显示飞机瞬时负过载超出该机限制值。针对此次事件,文章通过分析飞参数据,并开展地面试验对飞机故障进行了定位分析。结合仿真手段,对故障期间飞机的飞行品质进行了评估,对故障期间飞机出现俯仰振荡现象给出了合理的解释。文章的研究分析方法对类似飞行故障原因的定位分析具有一定的借鉴意义。

In the process of turning left to descend altitude, the flight control system of a certain type of aircraft suddenly suffered a "double channel failure". During the process of leveling attitude, the phenomenon of increasing oscillation happened to the pilot in the pitching direction, and the flight parameter data showed that the instantaneous overload of the aircraft exceeded the limit value of the aircraft. Aiming at this incident, the aircraft fault location analysis is carried out by analyzing the flight parameter data and conducting the ground test. Combined with the means of simulation, the flight quality of the aircraft during the fault is evaluated,and a reasonable explanation for the pitching oscillation of the aircraft during the fault is given. The research and analysis method of this paper has a certain reference significance for the location and analysis of similar flight fault causes.