公开(公告)号：US11333575B2

公开(公告)日：2022-05-17

申请号：US16629423

申请日：2018-03-01

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shuo Zhang ,  Jibang Li ,  Ximing Sun ,  Tao Sun

IPC: G01M13/045 ,  G06K9/62 ,  G06N20/20 ,  G06F17/14 ,  G06K9/00

Abstract: The present invention belongs to the technical field of fault diagnosis of aero-engines, and provides a method for fault diagnosis of an aero-engine rolling bearing based on random forest of power spectrum entropy. Aiming at the above-mentioned defects existing in the prior art, a method for fault diagnosis of an aero-engine rolling bearing based on random forest is provided, wherein test measured data for an aero-engine rolling bearing provided by a research institute are used for establishing a training dataset and a test dataset first; and based on an idea of fault feature extraction, time domain statistical analysis and frequency domain analysis are conducted on original collection data by adopting wavelet analysis; thereby realizing effective fault diagnosis from the perspective of engineering application.

公开(公告)号：US11305873B2

公开(公告)日：2022-04-19

申请号：US16341402

申请日：2017-10-23

Applicant: Dalian University of Technology

Inventor： Shuo Zhang ,  Zongyang Lv ,  Tao Sun ,  Yuhu Wu ,  Ximing Sun ,  Zhenyu Wu

IPC: B64C37/00 ,  B64C35/00 ,  B63B7/08 ,  B63B35/00 ,  B63G8/00 ,  B64C9/00 ,  B64C27/26 ,  B64C27/28 ,  B64C29/00 ,  B64D47/00 ,  B64C39/02

Abstract: An air, sea and underwater tilt tri-rotor UAV capable of performing vertical take-off and landing. By the method for controlling a submerged floating device and a tilt tri-rotor device, the UAV is switched among the vertical take-off and landing mode, fixed wing mode, water surface sailing mode and underwater submerging mode.