Optimal Design of Vehicle Power-Train Mounting System Based on Improved Particle Swarm Optimization

Abstract

Applying the multi-dynamic theory, a dynamic model of the power-train mounting system of motor vehicles is established. An optimization model for the power-train mounting system is constructed, in which decoupling efficiency of six freedom vibrations is selected as objective function, and the natural frequency distribution of system as constraint condition, the stiffness and installing angles as design variables of optimization. Based on improved particle swarm optimization, as an example, isolation characteristics of a truck power-train mounting system are analyzed. The comparison between the optimal and original design shows that distribution of both the modal kinetic energy and the system natural frequency are more reasonable, that means NVH of the power-train mount system can be improved using the optimal design.

Vibration and acoustic investigation for a deep hybrid transmission with power-split compound planetary gear set

“…By setting the external load F to zero, the natural mode of the power-split FSPG can be derived with solving equation (26), which is given as where ωi is the angular frequency and φi is the corresponding displacements of the six DOFs of the system with respect to its owner coordinate system. If the power-split FSPG system vibrated at the ith -order angular frequency, the mode kinetic energy distribution can be estimated from 21 where φni is the n th element in the mode vector φi and m nl is the element of the mass matrix M in the n row and l column.…”