Gear Noise Excitation

Engine Noise ◽  
1982 ◽  
pp. 55-93 ◽  
Author(s):  
W. D. Mark
Keyword(s):  
Gear Noise

The Effect of Micro-Geometry and Load on Helical Gear Noise Excitations

2005 ◽  
Author(s):  
Donald R. Houser ◽  
Jonny Harianto
Keyword(s):  
Helical Gear ◽  
Gear Noise

Reduction of Transaxle Gear Noise by Gear Train Modification

1992 ◽  
Author(s):  
Kouichi Ariga ◽  
Takeshi Abe ◽  
Yoshiaki Yokoyama ◽  
Yasuharu Enomoto
Keyword(s):  
Gear Train ◽  
Gear Noise

Case History: Engine Timing Gear Noise Reduction

1999 ◽  
Author(s):  
Donald R. Houser ◽  
Jonny Harianto ◽  
Jim Sorenson ◽  
Teik C. Lim ◽  
Cynthia Myers ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Case History ◽  
Gear Noise

Precise and High Response Measuring Method of Meshing Force of Planetary Gear Mechanism

2012 ◽  
Vol 516 ◽  
pp. 469-474
Author(s):  
Yuta Morimoto ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Yasuhiro Uenishi
Keyword(s):  
Electric Vehicles ◽  
Automotive Industry ◽  
Differential Rotation ◽  
Planetary Gear ◽  
Measuring Method ◽  
Power Source ◽  
Hybrid Vehicles ◽  
Gear Noise ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

Recently, technology for electric vehicles (EV) and hybrid vehicles (HEV) has been focused on by the automotive industry to address environmental problems including CO2 reduction [. In particular, in HEV, planetary gears are used to control differential rotation of the motor, engine and generator. For these vehicles, the noise level inside the vehicle is low because the motor is used as the main power source. As a result, further decrease of gear noise is desired compared with the conventional planetary gear mechanism. However, research into the gear noise of the planetary gear mechanism is extremely scarce. Therefore, in this study, we focus on the three axes of I/O rotation, and a new method of measuring the meshing force of the planetary gear mechanism. In this report, a gear-driving device, which is able to make 3-axis differential rotation, was designed for experimentation.

Additional Damping Conditions Analysis and Calculation for Exciting Force and External Load

2013 ◽  
Vol 579-580 ◽  
pp. 507-511
Author(s):  
Yi Xiang Liu ◽  
Yong Mei Wang
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Structure Design ◽  
Exciting Force ◽  
Reduction Gear ◽  
Solid Model ◽  
Gear Noise ◽  
Force Reduction ◽  
And Control ◽  
The Impact

This paper firstly starting mechanism of vibration and noise from gear, gear noise mechanism is explained, and analyze the factors and the impact of noise on the gear reducer. Secondly, the establishment of a complete solid model of gear reducer and reducer model for finite element model, the reduction gear box gear reducer of modal analysis and finite element modal calculation, and points out the dynamic analysis of structure, size and weight factor is proportional to the reciprocal of the modal frequencies of each mode is the with the frequency is low, that is, the greater the weight. Once again, the main measure of load and control of gear noise of gear is analyzed, including the calculation, for exciting force reduction gear reducer gear load computation. The analysis and calculation are the theoretical basis of gear structure design and its performance evaluation.

Dependence of tooth flank finishing on powertrain gear noise

2015 ◽  
Vol 37 ◽  
pp. 467-471 ◽  
Author(s):  
Simon Jolivet ◽  
Sabeur Mezghani ◽  
Mohamed El Mansori ◽  
Benoit Jourdain
Keyword(s):  
Gear Noise ◽  
Tooth Flank

The Mechanism and Solution of Harmonic Gear Whine Noise in Automotive Transmission Systems

2007 ◽  
Author(s):  
Jaegon Yoo ◽  
Koo-Tae Kang ◽  
Jin-Wook Huh ◽  
Chimahn Choi
Keyword(s):  
Surface Structure ◽  
Design Parameters ◽  
Test Results ◽  
Gear Noise ◽  
Transfer Path ◽  
Gear Design ◽  
Automotive Transmission ◽  
Wave Patterns ◽  
Tooth Modification ◽  
Harmonic Noise

Since gear noise in automotive is one of the most unpleasant noises for passengers, various solutions, such as gear design optimization, tooth modification and transfer path reformations in the vehicle have been developed. But, these attempts are mainly focused on the fundamental mesh excitation of the gear set without any consideration of their harmonic noise (1st, 2nd or higher). Harmonic gear whine noise is easily audible in the vehicle because of their high frequency characteristics in spite of low sound pressure level. This annoying pure-tone noise is usually issued in the transmission system composed of the gears produced by grinding process. This paper will present the main sources of this harmonic gear whine noise with the test results of gears with identical design parameters but having different surface structure (roughness parameters, wave patterns). Additionally, manufacturing guidelines of gear surface structure will be proposed at the end of this paper.

scholarly journals Reduction of Gear Noise with Active Noise Control.

2000 ◽  
Vol 66 (644) ◽  
pp. 1291-1297
Author(s):  
Satoshi ODA ◽  
Hisao SHIMIZU ◽  
Kouitsu MIYACHIKA ◽  
Takao KOIDE
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Gear Noise ◽  
Active Noise

Dynamic Model of a Spur Gear System With Backlash and Friction Consideration

1994 ◽  
Author(s):  
T. K. Shing ◽  
Lung-Wen Tsai ◽  
P. S. Krishnaprasad
Keyword(s):  
Free Oscillation ◽  
Equations Of Motion ◽  
Spur Gear ◽  
Constant Load ◽  
Friction Torque ◽  
Gear System ◽  
Real Time Control ◽  
Dynamical Equations ◽  
Gear Noise ◽  
Time Control

Abstract A new model which accounts for both backlash and friction effects is proposed for the dynamics of a spur gear system. The model estimates average friction torque and uses it to replace the instantaneous friction torque to simplify the dynamical equations of motion. Two simulations, free oscillation and constant load operation, are performed to illustrate the effects of backlash and friction on gear dynamics. The results are compared with that of a previously established model which does not account for the friction. Finally, the effect of adding a damper on the driving shaft is also studied. This model is judged to be more realistic for real time control of electronmechanical systems to reduce gear noise and to achieve high precision.

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