Vibration Analysis of a Horizontal Washing Machine, Part III: Optimal Parameters

The objective of this research work is to assign optimal parameters for the passive suspension of a horizontal washing machine and to assign proper value for the drum mass in order to increase the efficiency of the isolators and reduce the vibration velocity of the drum. The MATLAB optimization toolbox is used to maximize the isolation efficiency subjected to parameters constraints and a functional constraint which is the vibration velocity of the drum. The spinning speed is used as input variable to help the washing machine designer to assign a proper value for the spinning speed of his machine. The presented approach is capable of increasing the isolation efficiency to more than 97 % and reduce the drum vibration velocity to less than 14.8 mm/s RMS