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Study and Application of Gear Micro Modification of Electric Drive System
Abstract:
The gear whine in the electric drive system of an electric vehicle is important
and remains a challenge in developing novel electric vehicles. A gearbox dynamic
model is established, and the effects of modification parameters on the sound
pressure level, transmission error, and contact stress of the gear pair are
introduced to reduce the gear whine. A multi-objective optimization study of
four modification variables under multiple torque conditions is carried out by
using transmission error and maximum contact stress as the objective functions.
The eclectic programming method is imported to solve the convergence problem of
multi-objective optimization. The influence of modification variables on
objective functions is studied by establishing an approximate model of the
optimal Latin hypercube design. Results show that the application of the
multi-objective optimization method combined with the eclectic planning method
for the micro modification of the gear can reduce the transmission error of
multi-torque conditions, effectively reducing the gear whine noise in multiple
torque conditions and improving the contact of the tooth surface.