公开(公告)号：EP2686243B1

公开(公告)日：2015-11-18

申请号：EP12716520.7

申请日：2012-03-16

申请人： Messier-Dowty Limited

发明人： COLLETT, Laura ,  SCHMIDT, R., Kyle ,  SARTOR, Pia

IPC分类号： B64D45/00 ,  B64C25/00 ,  G07B17/02 ,  G07B3/02

CPC分类号： G06F17/5009 ,  B64C25/00 ,  B64D2045/008 ,  G05B17/02 ,  G05B23/0243

摘要： Method and system of determining ground-to-tire friction coefficient for an aircraft landing event. The method uses an aircraft computational model to repeatedly model the landing event, varying one or more initial conditions of the aircraft model until a best match between a modelled value and a provided value of aircraft vertical acceleration is determined. The method uses initial conditions associated with the best match of modelled and provided vertical acceleration values and a strain value from a sensor on the aircraft landing gear, with the ground-to-tire friction coefficient is a variable. The method models the landing gear to generate a modelled strain value and compares this with the measured strain value, and repeats the landing gear modelling step with a different value for the ground-to-tire friction coefficient until a best match between the modelled strain value and the measured strain value is determined and outputting the respective friction coefficient value.

公开(公告)号：EP2686243A2

公开(公告)日：2014-01-22

申请号：EP12716520.7

申请日：2012-03-16

申请人： Messier-Dowty Limited

发明人： COLLETT, Laura ,  SCHMIDT, R., Kyle ,  SARTOR, Pia

IPC分类号： B64D45/00 ,  B64C25/00 ,  G07B17/02 ,  G07B3/02

CPC分类号： G06F17/5009 ,  B64C25/00 ,  B64D2045/008 ,  G05B17/02 ,  G05B23/0243

摘要： Method and system of determining ground-to-tire friction coefficient for an aircraft landing event. The method uses an aircraft computational model to repeatedly model the landing event, varying one or more initial conditions of the aircraft model until a best match between a modelled value and a provided value of aircraft vertical acceleration is determined. The method uses initial conditions associated with the best match of modelled and provided vertical acceleration values and a strain value from a sensor on the aircraft landing gear, with the ground-to-tire friction coefficient is a variable. The method models the landing gear to generate a modelled strain value and compares this with the measured strain value, and repeats the landing gear modelling step with a different value for the ground-to-tire friction coefficient until a best match between the modelled strain value and the measured strain value is determined and outputting the respective friction coefficient value.

摘要翻译： 确定飞机着陆事件的地面与轮胎摩擦系数的方法和系统。 该方法使用飞行器计算模型来重复模拟着陆事件，改变飞行器模型的一个或多个初始条件，直到确定了建模值和所提供的飞机垂直加速度值之间的最佳匹配。 该方法使用与建模和提供的垂直加速度值的最佳匹配以及来自飞机起落架上的传感器的应变值相关联的初始条件，其中地对轮胎摩擦系数是变量。 该方法对起落架进行建模以产生建模应变值，并将其与测量的应变值进行比较，并重复起落架建模步骤，其具有不同的地对轮胎摩擦系数值，直到建模的应变值 测定应变值，并输出各摩擦系数值。