Tian Shaohua

TL;DR: In this article, a locomotive motor bearing automatic diagnostic method based on a vibration acceleration signal was proposed, comprising the steps of: acquiring a vibration accelerometer and a speed key phase signal of a motor bearing, performing order tracking and constant-angle incremental sampling, and converting the vibration acceleration acceleration signal into an angular-domain vibration acceleration signals, calculating an FFT spectrum and an EEVS enhanced envelope spectrum, setting effective frequency bands in the frequency bands, and calculating the fault probability of each component of the bearing according to the band energy.

TL;DR: In this paper, the utility model discloses a motor rolling bearing fault diagnosis system, which includes data acquisition device (2), treater (4), and comparator (5) of the vibration data under measuring device (1), intercepting rotational speed and the steady operating mode of electric current, and measuring device including setting up galvanometer (8) at motor antifriction bearing's three-dimensional acceleration sensor (6), speed sensor (7) and electricity connection stator, data acquisition devices (2) record accords with predetermined condition's vibration vector matrix acc,

TL;DR: In this paper, the authors proposed a method and a system for quickly detecting damage to a composite material plate, which comprises the following steps: performing modal test on the composite material plating to acquire modal shape data; calculating a two-dimensional generalized local entropy of the modal shapes data; judging whether the local entropy has abnormal data; and concluding whether the composite plating is damaged according to a judgment result of the last step.

TL;DR: In this article, a composite plate damage location method and system based on the frequency three-line intersection method is proposed. But the method is not suitable for site guidance of dynamics nondestructive testing of the composite plate.