純流体逆形フィードバック発振器の発振原理

Abstract

A new wall attachment type pure fluid oscillator was developed by means of inverse feedback loops. These loops are generally called positive feedback loops between right outlet and left control inlet and between left outlet and right control inlet. This inverse feedback oscillator itself is not self-excited, but needs one trigger pulse in order to begin oscillation.The principle of the oscillation of the inverse feedback oscillators was studied theoretically and experimentally. It was found that their frequencies were about twice as much as that of the conventional feedback oscillator. The pulse width of the inverse feedback oscillations was decided by the phase lag between two cycles, right to left cycle and left to right cycle. If these two cycles are different from each other, the oscillation will soon be stopped as the oscillation continues. However, these two cycles were experimentally found to be the same and the stable oscillation did not stop even when the device was asymmetrical. The reason why these two cycles were the same was studied and the stable conditions for the pulse width were discovered.