Accuracy of the Switching Pressure of Fluidic Amplifiers

Abstract

The statistical properties of the switching process of wall attachment amplifiers were studied in order to make the accuracy of the switching pressure clear. The switching process is classified into two modes : the initial switching and the random switching. The probability distribution functions of the switching delay were determined for both switching processes by considering the average deflection and the random fluctuation of the attached jet. A mathematical model was verified by experiments and the parameters in the model were determined. The relation or the input pressure vs. the switching probability for the input pulse with the finite duration is obtained by the mathematical model. A longer pulse yields a smaller pressure range of the uncertain switching. The theoretical estimation was verified by experiments.