Optimization of Cab Vibration Comfort for Construction Machinery Based on Multi-Target Regression Forests

Abstract

With the increasing awareness of the importance of environmental protection and the fierce competition in the construction machinery market, improving the vibration comfort of a whole construction machine has become a new focus of competition; therefore, optimizing the performance of cab mounts has become an urgent problem to be solved. At present, the problems of low modeling efficiency, serious technical difficulties, and long development cycles exist in the design and optimization of cab mounts. In this paper, a multi-target regression forests method is introduced into the design and optimization of the construction machinery installation system, which circumvents the traditional complex modeling process and establishes a mapping relationship between cab assembly parameters and the mounts’ stiffness, as well as introduces the system decoupling rate and vibration isolation rate as the boundary conditions. Furthermore, the MRFs method is compared and evaluated with MLRP and Multi-SVR prediction results. Finally, a complete, accurate, and efficient design method for the cab mount system optimization is developed, improving the decoupling rate and vibration isolation rate of the cab system. This design method can predict the stiffness of the mounts in multiple directions.

Optimization of Vehicle Powertrain Mounting System Based on Generalized Inverse Cascade Method under Uncertainty

“…In order to further verify the effect of the improvement scheme through experiments, mount samples were manufactured according to the median value of Pareto optimal solution set #1 in Table 7. Although the previous optimization objectives were weighted force transmission rate and weighted decoupling rate, considering the inconvenience of measuring the force and decoupling rate in actual testing, the mount vibration isolation rate was used for evaluation [29,30]. The mount vibration isolation rate is calculated by Equation ( 5): where; aa is the RMS value of the vibration acceleration at the active end of the mount (powertrain end); and ap is the RMS value of the vibration acceleration at the passive end of the mount (body end).…”