Measurement of Vehicle and Suspension Parameters for Directional Control Studies(STABILIZED Jan 2018)
The parameters measured according to this SAE Recommended Practice will generally be used in simulating directional control performance in the linear range. (The “linear range” is the steady-state lateral acceleration below which steering wheel angle can generally be considered to be linearly related to lateral acceleration.) But they may be used for certain other simulations (such as primary ride motions), vehicle and suspension characterization and comparison, suspension development and optimization, and processing of road test data.
This document is intended to apply to passenger cars, light trucks, and on-highway recreational and commercial vehicles, both non-articulated and articulated. Measurement techniques are intended to apply to these vehicles, with alterations primarily in the scale of facilities required. But some differences do exist between passenger cars and trucks, especially heavy trucks, such as differences in body/frame flexibility, suspension stiffness, and suspension friction. These will be addressed in this document or SAE J1574-2, where appropriate.
This technical report is being Stabilized because it covers technology, products, or processes which are mature and not likely to change in the foreseeable future. The Committee considers the report to have considerable reference value. It is being stabilized as issued in 1994 without updates in terminology or test procedures. Stabilization of this report assures its continued accessibility. The Committee may elect to update and republish it in the future.