Study of an Advanced Control System for Small Free-Turbine Engines
Final rept. 1 Jul-31 Dec 1968
UNITED TECHNOLOGIES CORP WINDSOR LOCKS CT HAMILTON STANDARD CORP
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Advanced small free-turbine engines in the 2-to-5-pps airflow class have undergone vast improvements in performance, permitting large reductions in overall size. Effort is required to optimize performance and to miniaturize the engine control system to keep pace with these improvements. This study program was undertaken to conceptually design an advanced engine control system for this class of engine, providing all the required functions consistent with an advanced system and to accommodate, with minimum hardware change, such variants as regenerative cycle andor variable turbine geometry. Study effort to determine the optimum control for the small engine of the mid 1970s fell into two major categories mode selection and technology selection. Technology selection consisted of reviewing electronic, fluidic, and hydromechanical technologies against a weighted set of evaluation criteria for application to the proposed system.
- Jet and Gas Turbine Engines