Application of rank-order morphological filter in refinement of rotor center's orbit

This paper introduced the good characteristic of rank-order morphological filter and its application in refinement of rotor center's orbit. Firstly, the definition of rank-order morphological filter was introduced. Secondly, the combined filters were constructed by the rank-order opening and rank-order closing. Finally, the interrupted rotor center's orbit was refined by the combined rank-order morphological filters. Simulation and practical results show that this approach has better refinement effectiveness in rotor center's orbit. It's suitable for on-line monitoring and diagnosis of rotating machinery.