Study on basic principles of operation noise of wiper system on vehicle 2019-01-1421
The wiper system consists of a motor, linkage, arm, and blade, which provides a clear front view to the driver by removing rain, snow, and foreign matter from the windshield glass. It is a system component that requires a robust design to meet system rigidity, scrubbing performance, and operating noise to any external conditions to provide the driver with a front view. In recent years, however, customer complaints about wiper noise have increased as automobile engine and noise levels have decreased. Based on the analysis of wiper noise, this paper presents quantitative judgment criteria for various wiper noises. In addition, we predict the change of wiper noise to environmental factors through the sound field analysis and propose the solution.
The results of this study are as follows.
First, qualitative criteria were established for the wiper noise according to customer 's standard. The frequency range and noise characteristics for chatter, reversal, and squeak noise, which are not preferred by the customer, were classified and noise standard was suggested.
In addition, we analyzed the influence factors on the wiper noise, identify the noise sensitivity of our wiper system through the sound field analysis technique, the experimental design method, and the Zwicker noise sensitivity evaluation parameter and analyze the noise according to the frequency. As a result, noise analysis that reflects the physical properties and environmental conditions of the wiper system can be used to prevent problems in advance by simulating the noise problems that may occur in the wiper.
Nak Kyoung Kong, Kihong Lee, Jongmin Park