A regularised solution to the bridge weigh-in-motion equations
by Eugene J. OBrien, Cillian W. Rowley, Arturo Gonzalez, Mark F. Green
International Journal of Heavy Vehicle Systems (IJHVS), Vol. 16, No. 3, 2009

Abstract: The traditional approach to Bridge Weigh-in-Motion (WIM) developed by Moses, gives good accuracy for estimating gross vehicle weights but is less accurate for individual axle weights. In this paper, Tikhonov regularisation is applied to the original Moses' equations to reduce some of the inaccuracies inherent within the algorithm. The optimal regularisation parameter is calculated using the L-curve criterion. The new regularised solution is numerically tested using simulations of moving vehicles on a bridge. Results show that the regularised solution performs significantly better than the original approach of Moses and is insensitive to road surface roughness.

Online publication date: Wed, 15-Jul-2009

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