Analysis of Rotational-Angle Difference Between Gears for Gear Noise Under Transient State Using Hilbert Transform Nippon Soken, Incorporated

Format:

Conference/Event

Author/Creator:

Ohara, Kouzi, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

The authors developed a useful analysis method of the rotational-angle of gear under transient state using the Hilbert Transform because the conventional method was not available under the transient state. Here, under the transient state the gear revolution speed was changed from 600r/min to 2000r/min in 0.35 seconds.A key technology of this method was that Hilbert Transform method, which used to be applicable only for steady data was improved so that it could treat transient data. Hence, the following procedures were developed.What is new with this analysis method was the adoption of a conversion process into quasi-steady signals, and through such conversion, accuracy of the analysis was improved to be smaller than 3 degrees phase-angle, even under immediate acceleration of 1400r/min gear revolution speed within 0.35 seconds.On a gear-tooth, which is deformed by transfer torque loaded during meshing period and restored repeatedly, problems of reliability and noise cannot be avoided. Especially under the transient state, because the deformation of gear-teeth changes immediately, abnormal noise may become obvious. This technology is the key to solving these problems of development, by clarifying the rotational-phase-angle difference between meshing gears under the actual operation state.This paper will report on how the gear noise during acceleration is generated. By using this developed method, it has become clear that the noise is generated by the worsening of the gear's meshing-performance due to elastic deformation of gear-teeth caused by gear transfer torque

Notes:

Vendor supplied data

Publisher Number:

2005-01-1832

Access Restriction:

Restricted for use by site license