A Study on the Dynamic Analysis of Recliner Gear for Vehicle Power Seats

Kim, Sung-Yuk; Lee, Jung-Bin; Kim, Key-Sun

doi:10.14775/ksmpe.2017.16.6.015

Cited by 8 publications

(2 citation statements)

References 1 publication

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“…The mechanisms of automobile interior parts, such as power seats, are generally composed of motors, shafts, gears, rails, and frame structures, which are vulnerable to noise and vibration because the mechanisms are intensively arranged in a narrow space [6][7][8]. In particular, in autonomous vehicles, because the seat slide rail has a long rail structure with a length of 1000 mm or more, the stiffness of the rail is reduced and the driving speed is increased, resulting in an overall increase in driving noise [9].…”

Section: Introductionmentioning

confidence: 99%

Methodology for Sound Quality Analysis of Motors for Automotive Interior Parts through Subjective Evaluation

Kim

Ryu

Jun

et al. 2022

Sensors

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With the development of autonomous vehicles, activities in the indoor spaces of autonomous vehicles are diversifying. Therefore, as the operating range of the interior parts increases, the occupant becomes sensitive to the operating noise of autonomous vehicles. Therefore, to reduce operating noise, it is necessary to analyze the causal relationship between the mechanical/electrical noise characteristics of the motor and sound quality. In this paper, we propose a methodology to analyze the relationship between the noise frequency components and the sound quality of small motors used in automobile interior parts. Two types of motors were selected for this study, and noise measurements and analyses were performed by applying the design proposed in this study. Subjective sound quality evaluations were conducted using the 12 pairs of adjectives extracted from the survey. The results suggest that subjective sound quality evaluation scores should be converted to Z-scores to ensure the reliability of the statistical analysis. In addition, we present a critical sound quality value that can be used as a criterion for determining whether the sound quality is positive (good quality) or negative (bad quality). Sound quality regression models explain the causal relationship between rotational frequency components of the motor and subjective sound quality characteristics. Thus, a method for analyzing the effect of the rotational frequency component of the motor on the sound quality is presented, which suggests that it can be used as basic research data to improve the noise performance of the motor.

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Section: Introductionmentioning

confidence: 99%

Methodology for Sound Quality Analysis of Motors for Automotive Interior Parts through Subjective Evaluation

Kim

Ryu

Jun

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

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“…The backrest adjuster is typically composed of a recliner and a DC geared motor, each of which is a major cause of operating noise and vibration [5]. In the case of the recliner, it usually consists of a gear wheel, gear rim, cam, rod, wedge, dry bush, spring, cover, and housing [6], [7]. Here, the cause of operating noise from the recliner is the change in load due to the eccentric motion of the gear wheel, gear mesh frequency, and chattering.…”

Section: Introductionmentioning

confidence: 99%

Analysis of operating noise characteristics and contribution for automotive seat backrest adjuster

Kim¹,

Kim²

2018

IJET

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Background/Objectives: This study involved basic research on operating noise in an automotive seat backrest adjuster through analysis of noise sources, noise source contributions, and seat pad noise reduction effects.Methods/Statistical analysis: The test product was a driver seat of 3300cc commercial sedan. First, basic data is obtained through analysis of driving mechanism of seat backrest adjuster. Based on this, vibration and noise characteristics were analyzed by operating test of backrest adjuster, and contribution analysis to noise sources was performed. Finally, by analyzing the effect of noise reduction on the seat pad, the effect of each noise source on the backrest operating noise was determined.Findings: First, it was confirmed that the low frequency fluctuation caused by the total noise is dependent on change in the load generated by eccentric rotation of the recliner gear. Therefore, it was found that the design of the recliner gear teeth was a decisive factor in controlling the motor load. Second, the 20th order (1,320Hz) of the DC geared motor was the main cause of operating noise, which was derived from friction noise of brush-commutator and torque ripple noise. This noise accounted for more than 55% of total operating noise. In addition, the 30th order amounted to approximately 18%. In other words, the harmonic components of the DC geared motor created most of the noise, and changing the brush material and reducing torque ripple is expected to significantly improve the overall operating noise. Lastly, as a result of the seat pad noise reduction effect, total power decreased by more than 11dB (A). In addition, it was confirmed that the 20th order cause of the main noise was reduced by about 45%p.Improvements/Applications: The noise contribution of the seat recliner adjuster derived from this study can be used as a basic data for noise reduction.

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A Study on Radiation Noise of Vehicle Power Seat Recliner using Finite Element Analysis

Kim¹,

Kim²

2018

KSMPE

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A Study on the Dynamic Analysis of Recliner Gear for Vehicle Power Seats

Cited by 8 publications

References 1 publication

Methodology for Sound Quality Analysis of Motors for Automotive Interior Parts through Subjective Evaluation

Methodology for Sound Quality Analysis of Motors for Automotive Interior Parts through Subjective Evaluation

Analysis of operating noise characteristics and contribution for automotive seat backrest adjuster

A Study on Radiation Noise of Vehicle Power Seat Recliner using Finite Element Analysis

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