Large Scale Integrated Circuit Turbine Engine Speed Control.
Final rept. Jan 69-Jul 70,
BENDIX CORP SOUTH BEND IN ENERGY CONTROLS DIV
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It is anticipated that future turbojet engine controls will use some nature of semiconductor technology which provides potential improvements in size, weight, and control design possibilities. The degree of advantage achieved will depend, in part, on significant use of Large Scale Integrated circuit components to minimize space and power required per function. Since using LSI circuits reduces the number of discrete components and interconnections necessary, gains in reliability can also be expected. An LSI demonstration fuel control was designed and built to accomplish speed regulation with a special purpose digital computing intelligence and data processing system to command conventional hydromechanical fuel metering elements. The combination was designed to effect closed-loop regulation of the engine rotor speed within plus or minus 10 rpm about a stabilized operating set-point. Although it operates on different parameters from the standard engine control, the LSI circuit control provided successful engine starts on every attempt and satisfactory operation under all conditions encountered for any variation in power lever handling. Automatic fuel scheduling for desired performance during all engine transients was successfully demonstrated. Author
- Jet and Gas Turbine Engines