摘要
综合考虑结冰后气动参数的变化和驾驶员动态特性,建立了结冰后人-机-环复杂系统非线性动力学仿真模型,仿真出结冰后迎角、俯仰角和俯仰角速度的变化趋势。提出了结冰恶化速率因子的概念,以迎角为临界参数,提出了通过冰型、结冰强度来判断失速的方法,提出了综合评估飞机在某一航段结冰后飞行风险的思路和对防冰系统最大允许故障率进行计算的方法,最后给出算例验证了该方法的实用性。
Considering the change of aerodynamic parameters after icing and dynamic characters of pilot,the model of iced pilot-aircraft-environment nonlinear dynamical complex simulation system was built up,and then the simulation of the change of angle of attack,pitch angle,pitch rate along with time was completed.The concept of icing deterioration velocity factor was proposed.Using angle of attack as critical parameter,a method for judging stalling based on the type and velocity of incrassation of icing was brought forward.A thought for evaluating the flighting risk caused by icing in a given route and a calculating method of the highest permitted failure rate of anti-icing system were proposed.Finally,an example was given to validate the method＇s practicability.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2011年第4期643-647,共5页
Journal of System Simulation
基金
国家自然科学基金(60572172)
关键词
结冰
失速迎角
结冰恶化速率因子
风险评估
最大允许故障率
icing
stalling angle
icing deterioration velocity factor
risk evaluation
highest permitted failure rate
