Identification of Road Profile Parameters from Vehicle Suspension Dynamics for Control of Damping

Concept of symmetry covers physical link between road profile form, vehicle dynamic characteristics, and speed conjunction. Symmetry frame between these items is asymmetric itself and has no direct expression, but it affects a vibration level on the vehicle and driving comfort. Usually, we can chang...

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Bibliographic Details
Published inSymmetry (Basel) Vol. 13; no. 7; p. 1149
Main Authors Čerškus, Aurimas, Lenkutis, Tadas, Šešok, Nikolaj, Dzedzickis, Andrius, Viržonis, Darius, Bučinskas, Vytautas
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2021
Subjects
Acceleration
accelerations
Accelerometers
Damping
Dynamic characteristics
Dynamic models
dynamics
fast sensor data transformation
Methods
Parameter identification
Power spectral density
road profile definition
Roads & highways
Shock absorbers
Suspension systems
Symmetry
Traffic speed
Transfer functions
Vehicles
Vibration
Waviness
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Summary:Concept of symmetry covers physical link between road profile form, vehicle dynamic characteristics, and speed conjunction. Symmetry frame between these items is asymmetric itself and has no direct expression, but it affects a vibration level on the vehicle and driving comfort. Usually, we can change only the vehicle’s speed to achieve desired vibrations level of the driver and passengers. Recently, vehicle dynamic characteristics can be changed depending on its damping system structure, but these solutions are limited by construction and control possibilities and evidently represented by symmetric dependency between road input and the resulting acceleration of the vehicle. The main limitation of this process is to have a reliable value of the existing road profile that is mainly defined by road category but unpredictable for each road distance. Functional road profile calculations are provided in this article, where power spectral density (further-PSD) and waviness of the road play the main role in delineating road profile parameters. Furthermore, the transfer function system was created using full car dynamic model analysis. Values on vehicle suspension’s effects on acceleration were obtained from vehicle speed and road roughness. Acceleration values and transfer function were used to calculate PSD value quickly and practically. This calculated result can be formed as a control value to the vehicle damping control. In addition, the provided methodology became useful to determine road quality for adjustment of vehicle suspension parameters and set safe driving characteristics, which became part of driver assistant systems or autonomous driving mode.
ISSN:2073-8994
2073-8994
DOI:10.3390/sym13071149