摘要
从三自由度飞机模型出发,提出了新的机场道面平整度评价理论,以不同平整度等级的3条测线的道面高程作为输入,在Matlab/Simulink环境中对飞机的三自由度振动方程进行求解,得到飞机机身的3个振动响应量:纵向俯仰角φ、横向滚转角θ及质心处竖向位移。在此基础上计算出道面整机平整度指数(Full aircraft roughness index,FARI)沿跑道纵向的分布曲线;同时计算出相同道面的国际平整度指数(International roughness index,IRI)。分别将FARI,IRI与在相应道面上滑行的飞机加权加速度均方根值进行了相关性分析,相关系数分别为0.980 6和0.886 9。结果表明整机平整度指数FARI更能够客观反应飞机所有机轮覆盖范围内道面起伏情况对飞机滑行过程中颠簸量的影响效果,更适合于机场道面平整度的评价。
Based on the three-degree-of-freedom aircraft model, a new airport pavement roughness evalua- tion theory is proposed. Taking three lines with different roughness grades as input, the three-degree- of-freedom vibration equation of the aircraft model is solved using Matlab/Simulink, through which the three vibration responses are obtained, namely, pitching angle φ transverse roll angle θ and vertical dis- placement at the center of mass. By utilizing three vibration response parameters, the distribution of full aircraft roughness index （FARI） along pavement longitudinal direction is acquired. Simultaneously, the international roughness index（IRI）parameter along the same line is calculated. Then the relevance be- tween FARI and the aircraft root mean square value of weighted acceleration, and the relevance between IRI and the aircraft root mean square value of weighted acceleration are analyzed, respectively. The cor- responding correlation coefficients are 0. 980 6 and 0. 886 9. The results show that FARI is a more objec- tive parameter to describe the aircraft bumpy effect in the taxiing process because of pavement fluctua- tion in the range of all aircraft wheel covering. Therefore, FARI is more suitable for airport pavement roughness evaluation.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2016年第4期606-614,共9页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
道路工程
整机平整度指数
软件模拟
三自由度飞机模型
SIMULINK仿真
road engineering
full aircraft roughness index
software simulation
three-degree-of-free- dom aircraft model
Simulink simulation
