An automatic balancer using magnetic fluid and magnets (A study on settling time)

Abstract

This paper describes the settling time of an automatic balancer that uses magnetic fluid and magnets. The settling time was examined, both by experiments and calculations. The settling time was calculated from the trajectory of the magnets. Trajectory was calculated using the Runge-Kutta method. A prototype was fabricated to confirm the settling time, through an experiment. Theoretical calculation results generally matched with experiment results. Additionally, the influence of change in the number of magnet was examined. Measurement results confirmed that the mean values and standard deviations were 2.06 seconds and 1.98 respectively for the case of two magnets, whereas they were 1.55 seconds and 0.670 respectively for case of four magnets, indicating that the settling time was smaller for both values with the case of four magnets. Such results made it apparent that the case of four magnets offers a superior settling time and smaller variance. The same results were also derived from calculations. We confirmed that the balance correcting performance is influenced magnetic repulsive force of magnets by calculations. Automatic balancer with a superior performance of the balance correcting and settling time is proposed.

Keywords

• automatic balancer
• imbalance
• magnet
• magnetic fluid
• settling time
• transient response