Browse Publications Technical Papers 2019-01-1527
2019-06-05

Effect of Optimal Hypoid Gear Tooth Profile Modifications on Vehicle Axle System Dynamics 2019-01-1527

The vehicle axle gear whine noise and vibration are key issues for the automotive industry to design a quiet, reliable driveline system. The main source of excitation for this vibration energy comes from hypoid gear transmission error (TE) and transmits through the flexible axle components, then radiates off from the surface of the housing structure. Thus, the design of hypoid gear pair with minimization of transmission error is one way to improve the dynamic behavior of the vehicle axle system. In this study, an approach to obtain minimum transmission error and improved dynamic response with optimal tooth profile modification parameters is discussed. A neural network algorithm, named Back Propagation (BP) algorithm, with improved Particle Swarm Optimization (PSO) is used to predict the transmission error if some tooth profile modification parameters are given to train the model. With the optimal Hypoid gear tooth profile modification, a system level analysis of vehicle axle system is performed to verify the improvement on dynamic response aiming at minimizing the transmission error. A case study of a Hypoid gear pair with specified design parameters and working condition is presented to verify the proposed method. The modal characteristics and dynamic response before and after the tooth profile modification have been compared. The results conclude that minimization TE, the main excitation of vehicle axle gear whine noise and vibration, with optimal tooth profile modification parameters can improve the overall NVH behavior. The proposed approach provides a better understanding of an optimal design Hypoid gear set to minimize TE and effect on vehicle axle system dynamics.

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