How significant are transfer function relations and invariant points for a quarter car suspension model?

The quarter car model has been used extensively to study the benefits of active, semi-active and passive suspensions. Despite the evident simplicity of the model, the insights obtained from this model have been found to have counterparts in half- and full-car suspension models. Among the most intere...

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Bibliographic Details
Published in:Vehicle system dynamics 2009-04, Vol.47 (4), p.457-464
Main Author: Karnopp, Dean
Format: Article
Language:English
Subjects:
active suspension
Applied sciences
automotive suspension
Computer science
control theory
systems
Control system synthesis
Control theory. Systems
Exact sciences and technology
invariant points
Machine components
Mechanical engineering. Machine design
quarter car model
Springs and dampers
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Summary:The quarter car model has been used extensively to study the benefits of active, semi-active and passive suspensions. Despite the evident simplicity of the model, the insights obtained from this model have been found to have counterparts in half- and full-car suspension models. Among the most interesting results of the analysis of the quarter car are the relationships among certain transfer function and invariant points in the frequency response functions. These results are of great interest for the application of linear control techniques to the design of active suspensions and the optimisation of linearised passive suspensions. This paper attempts to show why some of the limitations implied by the model are less absolute than they at first seem.
ISSN:0042-3114
1744-5159
DOI:10.1080/00423110802179909