Bridge dynamic weighing algorithm based on iterative weighted least square

The invention provides a bridge dynamic weighing algorithm (IRLS algorithm for short) based on iterative weighted least squares, and the algorithm comprises the steps: obtaining a bridge load response when a vehicle passes through a bridge, carrying out the axle load recognition through a Moses algorithm, and obtaining an initial axle load A (0); taking the initial axle load A (0) as a known quantity in the algorithm, calculating a residual error R, substituting the residual error into a logic weight coefficient function to obtain a corresponding weight coefficient W, substituting the obtained weight coefficient into an axle load expression to obtain the axle load of the vehicle, and continuously repeating the process to update the axle load of the vehicle until the calculated axle load result is converged. According to the method, a proper weight coefficient is provided for the load response value at each moment in the calculation process. The larger the weight coefficient of the load response is, the larger