基于综合限制函数超限的飞行事故虚拟再现系统设计

Flight Accident Reconstruction System Based on Synthetic Parameter Restriction Function

针对飞行事故再现技术中分析方法的不准确性和不直观性,结合飞参分析与分布式仿真技术,研究了事故再现中的关键分析技术,以决定性参数的综合限制函数超限作为事故最终发生的原因;在此基础上,设计了基于虚拟现实技术的事故仿真系统.该系统可以在定量分析事故发生过程的同时进行飞行状态3D演示;最后对某型低空突防战机副翼位置传感器失效引起的飞行事故进行了仿真分析,从数学层面以高度综合限制函数作为判断事故发生的依据,准确直观地解算并再现了事故发生后的状态变化情况.调查结果表明,左副翼卡滞状况下引起的位置传感器共模故障为事故发生的原因,其中高度限制器对事故的发生起了促进作用.

In order to solve the problem of inaccuracy and lack of visualization in current flight accident analysis system,we built an accident reconstruction system based on the technology of virtual reality and distributed simulation.This system takes overrunning of decisive flight parameter function as the essential cause of the flight accident.It can analyze the process of accident quantitatively,and simulates flight state simultaneously using 3D visualization technique.We analyzed an accident that happened when one fighter plane was taking low altitude penetration mission,taking the synthetic restriction function of altitude as the guidance of determining the fighter＇s changing state.At the same time the simulation system demonstrated the accident calculating process precisely and vividly using virtual reality technology.The results suggested the accident may be caused by common mode failure of aileron actuating cylinder blocking and position sensor malfunction,and the height limiter might induce its happening.