Abstract
Operating characteristic of a sonic oscillator using a load sensitive bistable amplifier is considerably affected by an output loading and becomes very complex as the result of interaction of the oscillatory phenomena in the sonic conduit and the output conduits.
In this paper, the effects of output loads consisting of long conduits and restrictors on the sonic oscillation are investigated theoretically and experimentally. In a mathematical model of the oscillator, the sonic loop conduit and the long output conduits are considered as distributed parameter elements. In the analysis, the describing function method are used because of a marked nonlinearity included in the characteristics of the bistable amplifier. A frequency equation of the oscillator is derived and the frequency variation according to the change of length of the sonic loop conduit and output conduits is discussed. Consequently, it is found that the deviation of the oscillation frequency from that of the sonic oscillator having no output conduits is remarkably influenced by the natural frequencies of the output loading. The theoretical results are in good agreement with the experimental ones.
