Fluid reaction surfaces (i.e. – impellers) – Method of operation
Patent
1982-07-02
1985-05-28
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Method of operation
416 31, 416114, 244 1713, B64C 2744, B64C 2770
Patent
active
045197431
ABSTRACT:
The pitches of the several blades in a helicopter rotor assembly are controlled by individual blade control subsystems. Those blade control subsystems respond to the output signals from accelerometers mounted on the blades. The signals from the accelerometers are used to control the pitch of the blades on which the accelerometers are mounted as well as the pitch of other blades. By appropriate orientation of any accelerometer and filtering within a particular feedback subsystem, each subsystem is designed to correct particular modes of blade motion to the exclusion of other modes of motion by varying lift.
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Massachusetts Institute of Technology
Powell Jr. Everette A.
Smith Arthur A.
Smith James M.
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