Fuzzy logic method and apparatus for changing the position of turbine blades via an induction motor, brake and a position lock.
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United States of America Patent
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Jan 2, 1996
Grant Date -
N/A
app pub date -
Dec 23, 1993
filing date -
Dec 23, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Three separate fuzzy rule sets are applied to three corresponding fuzzy sets developed from various input parameters for providing a pitch engagement/mode selection management system and method for requesting disablement of a blade lock, for disabling such lock when the torque available matches the torque required, and for selecting a motor or brake for creating a differential speed between a rotating pitch change mechanism and a fan shaft of a turbine engine. A fuzzeresis rule set is disclosed for stabilizing the motor/brake mode selection fuzzy logic output.
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