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Novel Use of a Piezoelectric Ultrasonic Motor for Headlamp Leveling | IEEE Conference Publication | IEEE Xplore

Novel Use of a Piezoelectric Ultrasonic Motor for Headlamp Leveling


Abstract:

The driver must always have clear visibility and the Automatic Headlamp Levelers (AHL) are one among several devices used to enhance vision in dim conditions. Typically, ...Show More

Abstract:

The driver must always have clear visibility and the Automatic Headlamp Levelers (AHL) are one among several devices used to enhance vision in dim conditions. Typically, dynamic levelers use a stepper motor and present intrinsic play due to the utilization of geared mechanisms that transform the initial rotational movement in a linear one. However, some scenarii or even some lighting applications require a higher dynamic behavior with higher precision and repeatability for adjusting the headlamp cut-off, e.g. rough terrain driving, long range illumination with high power sources, etc. In this paper, we study the use of a piezoelectric motor as an actuator for dynamic headlamp leveling, a mechatronic actuator that may be the next step in automotive lighting. The paper describes an experimental setup for headlamp leveling using a piezoelectric motor and a first evaluation of the results. The system may be used to compensate the short time pitch angles caused by the driving dynamics besides offering ultra-high precision of ±0.003°.
Date of Conference: 08-12 July 2019
Date Added to IEEE Xplore: 17 October 2019
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Conference Location: Hong Kong, China

References

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