The analyzed signal comes from an analytical model of a fixed-axis gear transmission. The model takes into account the deformability of the gear teeth. The modeled damages are: tooth surface damage and tooth cracking (resulting in tooth breakage). Surface damage is modeled by increasing the backlash, while cracking is modeled by a percentage reduction in the stiffness of the damaged tooth.Such gear damage has a minor effect on torque transmission, but it causes a change in the transverse forces acting on the gear shafts. Measurement and analysis of signals from transverse forces (i.e., dynamic reactions) allow for the diagnostics of this type of gear damage. A gear transmission is an integral part of the kinematic chain of the power transmission system from the engine to the energy receiver. The basic assumption for a gear transmission is to change the transmitted torque and rotational speed while minimizing dynamic disturbances and maximizing efficiency. (…)
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Source: Logistyka Magazine 2010
Using the kurtogram for gear damage detection – PDF file for download