Accession Number : AD0700764

Title :   FLUERIC NOISE STUDY IN SINGLE AND CASCADE FLUID AMPLIFIERS.

Descriptive Note : Final rept. Jan 68-Aug 69,

Corporate Author : SINGER-GENERAL PRECISION INC LITTLE FALLS N J KEARFOTT DIV

Personal Author(s) : Donoghue,James ; Galowin,Lawrence S. ; Morici,Frank ; Rakowsky,Edward L. ; Thau,Fred

Report Date : AUG 1969

Pagination or Media Count : 101

Abstract : An investigation of a method to predict the noise response within fluid amplifiers was undertaken using well established analytical techniques from electrical circuit network theory. The synthesis of a flueric analog amplifier mathematical model was based upon establishing an equivalent electrical circuit. Appropriate noise voltage and current generators were employed to account for the experimentally observed noise responses of the flueric elements. The general approach was based upon the assumption that a vacuum tube equivalent circuit could be applied for the representation of the noise response of analog flueric elements. Initially, to accomplish this, justification was sought for the electrical analogy adopted by other investigators and presumably found valid by comparison with test data for the deterministic case. Subsequently, the deterministic gain of a single amplifier was determined experimentally at different supply pressures. Experimental results contradicted the predicted response of the electrical equivalent circuit which indicated that the cross-over frequency and the magnitude of the gain for frequencies below cross-over should both be directly proportional to supply pressure. It was hypothesized that the discrepancies between experimental and calculated deterministic gains would disappear if the circuit parameters were calculated considering the Reynolds number held fixed as supply pressure varied. Experimentally determined amplifier gains for three different supply pressures, but with constant output channel Reynolds number, were obtained. (Author)

Descriptors :   (*FLUID AMPLIFIERS, *NOISE), MATHEMATICAL MODELS, MATHEMATICAL PREDICTION, CASCADE STRUCTURES, SIMULATION, REYNOLDS NUMBER, FLUIDICS

Subject Categories : Fluidics and Fluerics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE