The measurement of Gear Transmission Error as an NVH indicator: Theoretical discussion and industrial application via low-cost digital encoders to an all-electric vehicle gearbox

Palermo, Antonio; Britte, Laurent; Janssens, Karl; Mundo, Domenico; Desmet, Wim

doi:10.1016/j.ymssp.2018.03.005

Cited by 72 publications

(41 citation statements)

References 45 publications

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“…In most cases, however, the TE at the tooth pitch is evaluated, since most of the noise from the gearing is occurred at the mesh / tooth frequency [19]. When evaluating the measurement, it is therefore necessary to mathematically separate the transmission JOURNAL OF MEASUREMENTS IN ENGINEERING error from the total transmission error [3].…”

Section: Transmission Errormentioning

confidence: 99%

“…Transverse profile modifications are mainly used to compensate for tooth deformation, flank line modifications to compensate for shaft deformation [20]. The aim is, among other things, to reduce the peak-to-peak value of the mesh stiffness and thus also the transmission error [3]. The most common transverse profile modifications include linear tip / root relief, or a combination of both on one gear, the other gear being left unmodified.…”

Section: Gear Teeth Modificationsmentioning

confidence: 99%

“…In order to reduce the radiated noise, it is therefore necessary to deal with the gear mesh and its optimization. It turns out that the relation between vibration / noise and gear mesh can be relatively well expressed by the parameter called transmission error [3,4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of static transmission error of helical gears using finite element analysis

Czakó¹,

Řehák²,

Prokop³

et al. 2020

J. meas. eng.

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At present, increasing emphasis is being placed on low noise levels, especially in the automotive industry. One of the dominant sources of noise (and vibration) in vehicles (with an electric motor as well as an internal combustion engine) is the transmission system. In order to effectively reduce vibration and noise of gears and transmission systems, some important gear parameters should be determined / measured. One of these parameters is the static transmission error, which is addressed in this article. The evaluated parameter is the peak-to-peak value of the transmission error, which appears to be closely related to NVH (Noise Vibration and Harshness). The transmission error depends, inter alia, on the tooth macrogeometry (expressed by the contact ratio) and the tooth microgeometry (intentional tooth modifications), the influence of both has been analyzed and is presented in this article. The transmission error can be determined by virtual measurement (computationally) in software enabling finite element analysis or by technical experiments on a test rig. The results in this paper are based on the outputs of numerical simulations using the finite element method. This approach can be used at developing phase to find the optimal solution and to save a lot of time. In addition, no physical components are required and a wide range of arbitrary gear configurations can be analyzed. Nevertheless, the technical experiment is still necessary, thus the test rig will be designed/constructed in the near future, including the possibility of lubrication. The results will then be compared with numerical simulations.

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Section: Transmission Errormentioning

confidence: 99%

Section: Gear Teeth Modificationsmentioning

confidence: 99%

See 1 more Smart Citation

Determination of static transmission error of helical gears using finite element analysis

Czakó¹,

Řehák²,

Prokop³

et al. 2020

J. meas. eng.

View full text Add to dashboard Cite

show abstract

“…Nowadays, the need for dynamic TE measurement grows faster because dynamic TE has a closer relationship with gear whine noise. ere are three methods suitable for measuring dynamic TE: one based on optical encoders [143,144], another based on vibrometers [145], and the last based on accelerations [142,[146][147][148].…”

Section: Transmission Error Measurementmentioning

confidence: 99%

Classifying, Predicting, and Reducing Strategies of the Mesh Excitations of Gear Whine Noise: A Survey

Sun

Liu

et al. 2020

Shock and Vibration

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Gear whine noise has attracted increasing attention from researchers in both the academe and the industry over the past two decades. The wide range of research topics demonstrates that there is a huge technical challenge in understanding the source-path-receiver mechanisms deeply and predicting the gear whine noise precisely. Thoroughly understanding the sources of gear whine noise is the first step to solving this issue. In this paper, the authors summarize a certain number of published articles regarding the sources of gear whine noise. The excitations of gear whine noise are classified into three groups: transmission error along the line of action direction, frictional excitations along the off-line of action direction, and shuttling excitation along the axial direction. The mechanisms, characteristics, predicting approaches, measuring methods, and decreasing strategies for these excitations are summarized. Current research characteristics and future research recommendations are presented at the end.

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“…The power source of the pure electric bus is electric motor, the transmission is used to transfer power from electric motor to drive axle [1]. The transmission noise becomes dominated especially when the transmission given the absence of masking noise from the internal combustion engine [2,3].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study of Vibration and Noise of Pure Electric Bus Transmission based on Finite Element and Boundary Element Methods

Lei

et al. 2019

IJE

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A B S T R A C TSince the electric motor of pure electric vehicle replaced the engine, the "masking effect" disappears, and the problem of vibration and noise of the transmission becomes prominent. This is generated during the gear meshing and is transmitted to the housing through the shaft and bearing. Thereby, radiation noise of the housing are generated. The prediction and analysis of the vibration and noise problems of transmission can be avoided during the design process, which will shorten the development cycle and reduce the development costs. In this paper, the finite element model and boundary element model of the three-axis four-speed automated mechanical transmission (AMT) for pure electric bus were established by Finite Element Method (FEM) and Boundary Element Method (BEM) for modal and acoustic analysis. The excitation of the gear system is used as the input, and the direct boundary element method is used to predict the noise of the AMT. The correctness of the simulation method is verified by the comparing simulation with bench test results.

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The measurement of Gear Transmission Error as an NVH indicator: Theoretical discussion and industrial application via low-cost digital encoders to an all-electric vehicle gearbox

Cited by 72 publications

References 45 publications

Determination of static transmission error of helical gears using finite element analysis

Determination of static transmission error of helical gears using finite element analysis

Classifying, Predicting, and Reducing Strategies of the Mesh Excitations of Gear Whine Noise: A Survey

Simulation and Experimental Study of Vibration and Noise of Pure Electric Bus Transmission based on Finite Element and Boundary Element Methods

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