Abstract
For the purpose of using parallel capillaries as transmission lines in analogue fluidic circuit systems, the power transmission characteristics are theoretically and experimentally investigated. The effects of the dimensions of parallel capillaries, the internal impedance of the signal source, and the load impedance are studied over the frequency range of 0∼300Hz. It is shown that the parallel capillaries are useful as low-pass transmission lines between fluidic amplifiers, but it is difficult to obtain good characteristics at the attenuation band. The experimental results agree well with predictions from a distributed parameter theory over the total frequency range. For a lumped parameter theory, the differences are within 10 percent at Ω≤40. (Ω=2πfa2/ν)
Finally the theoretical method of design for a parallel capillaries transmission line is described with an example.
