Research on the method of feature extraction and recognition of axis trajectory

Axis trajectory is an important parameter reflecting rotating machinery state.This paper puts forward new axis trajectory characteristics and identification methods.Holes' number,area-toperimeter ratio,mass center's position,indentations' number and intersection's position are used as features to recognize axis path in two ways-template comparison method and fast judgment method.They are targeted methods and the computing speed is fast.Use VC++for programming and test.The analysis obtained good result.