The weight inverse triangle transform GM(1,1) and its application in the prediction of pitch motion

In this paper a weight inverse triangle transform GM (1,1) is proposed to deal with periodic oscillating data. Both the modified inverse triangle transform and the parallel transform are incorporated into the original GM(1,1) model to address the fitness of the smooth discrete condition. The proposed model is applied into the prediction of ship pitch motion. The numerical experiment result shows that the new method has good feasibility.