Apply grey relational grade in optimal airplane landing gear loads calibration

Airplane landing gear loads are hard to be obtained by utilizing theoretical method. Therefore, flight measurement is a good alternative in engineering. Before the flight measurement takes place, ground calibration test is required to obtain the relationship between the structural strain and load. This relationship will be used during flight measurement to transform strain data into load. Traditionally, we use regression analysis method to build this relationship with minimum error. In this paper, we present the grey relational grade to cardinal strain sensor test data. This cardinal can be used to select the representative parameters and construct a good ldquostrain-loadrdquo equation, also, a Matlab toolbox is established to effectively generate this study.