Moment Method - A Comprehensive Tool for Race Car Development
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Abstract
The MRA Moment Method computer program automates an original approach to the analysis of race car handling. For a given speed and power/braking condition, the computer solution covers the full maneuvering envelope and presents the results graphically in one figure. The model is based on a comprehensive nonlinear vehicle representation utilizing tire, chassis, and aerodynamic input data as available to race car designers and developers. The paper will first explain and illustrate the Moment Method in general terms, with some graphical examples.
The ability of the technique to model the behavior of an F.1 car traversing a small bump in mid-corner on a Grand Prix circuit is then reviewed. The results correlate well with the driver comments relative to changes in directional stability (plow/spin) as the car pitches over the bump. It also correlates well with the lateral acceleration/speed that the driver is willing to use in this corner.
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Citation
Milliken, W., Wright, P., and Milliken, D., "Moment Method - A Comprehensive Tool for Race Car Development," SAE Technical Paper 942538, 1994, https://doi.org/10.4271/942538.Also In
References
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- Rice, R. S. and Milliken W. F., “Static Stability and Control of the Automobile Utilizing the Moment Method”, SAE Paper No. 800847, 1980.
- Milliken, W. F. and Rice R. S., “Moment Method”, IMechE Paper No. C113/83, 1983.
- Segal, David J., and Milliken D. L., MRA Moment Method User's Manual, Milliken Research Associates Inc., 1990, 1994.
- Milliken, W. F., Moment Method Interpretation Manual, Milliken Research Associates Inc., 1989.
- Perkins, C. D. and Hage R. E., Airplane Performance, Stability and Control, Wiley and Sons, 1949.
- Irving, F. G., An Introduction to the Longitudinal Static Stability of Low-Speed Aircraft, Pergamon Press, 1966.
- “Chaparral G. S. Documentation Tests”, Chevrolet File, February 26, 1968, revised April 15, 1968.