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- W2135759912 abstract "A test program to demonstrate simplification of Active Noise Control (ANC) systems relative to standard techniques was performed on the NASA Glenn Active Noise Control Fan from May through September 2001. The target mode was the m = 2 circumferential mode generated by the rotor-stator interaction at 2BPF. Seven radials (combined inlet and exhaust) were present at this condition. Several different error-sensing strategies were implemented. Integration of the error-sensors with passive treatment was investigated. These were: (i) an in-duct linear axial array, (ii) an induct steering array, (iii) a pylon-mounted array, and (iv) a near-field boom array. The effect of incorporating passive treatment was investigated as well as reducing the actuator count. These simplified systems were compared to a fully ANC specified system. Modal data acquired using the Rotating Rake are presented for a range of corrected fan rpm. Simplified control has been demonstrated to be possible but requires a well-known and dominant mode signature. The documented results here in are part III of a three-part series of reports with the same base title. Part I and II document the control system and error-sensing design and implementation." @default.
- W2135759912 created "2016-06-24" @default.
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- W2135759912 date "2003-05-12" @default.
- W2135759912 modified "2023-09-27" @default.
- W2135759912 title "Active Control of Low-Speed Fan Tonal Noise Using Actuators Mounted in Stator Vanes: Part 3 Results" @default.
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- W2135759912 doi "https://doi.org/10.2514/6.2003-3193" @default.
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