TIME-SERIES ANALYSIS OF BEHAVIOR OF A 2-LINK NOZZLE IN A DISHWASHER

The two-link nozzle in the dishwasher-dryer is composed of two links w hich rotate by the water flow. Although the behavior of the two-link n ozzle is related closely to the washing performance of the dishwasher, its behavior is complex. In this sense, in order to improve the washi ng performance of the dishwasher, it is necessary to analyze the behav ior of the two-link nozzle and to clarify the washing mechanism. This study aims at providing the basis for the analysis of the behavior of the two-link nozzle. The motion of the nozzle is detected by image pro cessing, and the behavior of the nozzle is analyzed based on the deriv ed time-series from the viewpoint of the deterministic chaos. The resu lt is reported. The following calculations are made as the data analys is: (1) analysis of the Poincare section and the circle map, based on the attractor reconstructed from the time-series; (2) calculation of t he maximum Lyapunov exponent; and (3) calculation of the fractal dimen sion. As the result of analysis, the fractal dimension of approximatel y 2.4 as well as the positive maximum Lyapunov exponent are obtained f rom the time-series data detected by the image processing. The noninve rtible structure is observed in the circle map. Those results suggest that the behavior of the two-link nozzle is related closely to the det erministic chaos.