The Relationship Between the Complexity of Linear Models and the Utility of the Computer Results 920052
Linear analysis and corresponding vehicle tests have been used since the late 1950's to help understand the directional response of automobiles and commercial vehicles. This work is now well accepted, and linear terms such as understeer gradient and response time are descriptors routinely used to characterize vehicle performance in the linear range.
This paper assesses the use of various levels of complexity in linear models. It verifies that, for steady state measures such as understeer gradient, all important effects can be handled quasistatically and a two degree of freedom model is adequate. The paper then illustrates situations in which the roll degree of freedom can be important for transient calculations, and assesses the changes in calculated transient results deriving from the addition to the model of time lags in lateral tire force buildup.
Citation: Lund, Y. and Bernard, J., "The Relationship Between the Complexity of Linear Models and the Utility of the Computer Results," SAE Technical Paper 920052, 1992, https://doi.org/10.4271/920052. Download Citation
Author(s):
Yvonne I. Lund, James E. Bernard
Affiliated:
Iowa State Univ.
Pages: 10
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Vehicle Dynamics and Rollover Propensity Research-SP-0909, SAE 1992 Transactions: Journal of Passenger Cars-V101-6
Related Topics:
Commercial vehicles
Vehicle performance
Computer simulation
Reaction and response times
Roll
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