Optimal recovery manoeuvres of racing motorcycles

Abstract

The focus of this work is on the optimal recovery manoeuvres of racing vehicles, which are here defined as the manoeuvres that need be performed in order to complete the lap in the minimum time, after a driving error occurs. The driving errors considered are speed excess and trajectory deviations, with respect to the baseline conditions. The baseline conditions are those giving the minimum lap time, and are vehicle and track dependent. The practical applications of the methodology proposed include the estimation of the driving errors that can be recovered while remaining within the racetrack borders, and the estimation of the minimum asphalted run-off area that need be provided to recover from driving errors of given magnitude. An example of application is given for a racing motorcycle on the Mugello circuit.

An experimental procedure for the identification of the dynamic parameters for the rigid-ring tyre model

“…Tyre models which provides forces and torques as a function of slips and loads are commonly used in vehicle dynamics applications [1][2][3][4][5][6][7][8]. Tyre models may be classified in three main levels of complexity: basic, neglecting the belt inertia [9][10][11][12], suitable for simulations with frequencies up to approximatively 15 Hz and wavelength greater than approximatively 1.5 m, intermediate, considering the belt as a rigid ring elastically mounted on the rim [13][14][15], suitable for simulations up to 60-100 Hz and wavelength greater than 0.1-0.2 m, and advanced, allowing belt deflection [16][17][18][19], suitable for higher frequencies and shorter wavelengths.…”

“…A number of works dealing with the vibration modes of tyres are documented in the literature. The most relevant to this work are those dealing with vehicle-dynamic applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], rather than those focusing on stress and fatigue estimations.…”