Design of a Near-Optimal Fluidic Operational Amplifier.
LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS
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Traditional design of fluidic operational amplifiers places the loop filter, necessary for stability, in the feedback path. One consequence is severe saturation of the forward-loop high-gain amplifier for all except low frequency or very small amplitude input signals, producing very low effective break frequency. Using optimal control concepts a design was evolved employing, instead, forward-loop filtering. The forward-loop amplifier chosen, a five-stage proportional amplifier has a nearly constant gain for a broad band of frequencies. The optimal design which assumes this characteristic has, theoretically, neglecting certain inevitable dissipative and inertive effects, no transient saturation at all to step changes in the input, and a response which is theoretically ideal. The filters contain closed-end resonant cavities. Modified author abstract
- Fluidics and Fluerics