[특허]Adaptive synchrophaser for reducing aircraft cabin noise and vibration

[미국특허] Adaptive synchrophaser for reducing aircraft cabin noise and vibration 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-011/50
출원번호	US-0199000 (1994-02-18)
발명자 / 주소	Magliozzi Bernard (West Suffield CT)
출원인 / 주소	United Technologies Corporation (Hartford CT 02)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

An “adaptive synchrophaser”is disclosed for modifying the phase angle relationship between aircraft propellers to reduce cabin noise and/or vibration. Rather than use a constant pre-selected angle for a specific passenger cabin configuration during a particular flight mode (e.g., during liftoff or cruise), the synchrophaser periodically monitors actual operating conditions and modifies the phase angle accordingly. In the preferred embodiment, a plurality of transducers (microphones) are installed at several cabin locations to sample noise periodically. The signals are then transmitted via a signal conditioner, a multiplexer and an analog-to-digital converter to a signal processor. The processor calculates the maximum acoustic noise at each microphone location for all possible phase angles. It then identifies the optimum phase angle that resulted in the lowest maximum noise anywhere in the cabin, and signals a synchrophaser to set that angle. This process not only reduces noise based on actual on-going conditions, but also balances the cabin noise so that there are not any “hot”seats with high noise levels.

대표청구항 ▼

Apparatus, disposed on an aircraft having at least two propellers, operable to set a phase angle between the propellers to an desired value, said apparatus comprising: a. sensing means, disposed throughout various locations on the aircraft, for sensing a predetermined aircraft parameter at each of the aircraft locations and for providing a corresponding sensed signal for each of the aircraft locations; b. synchrophaser means, responsive to a phase angle signal, for setting a phase angle between the propellers to a predetermined value; and c. signal processing means, responsive to each of the sensed signals, for incrementally setting the phase angle signal to a series of values, for comparing, at each incremental value of the phase angle signal, the sensed signals to determine the sensed signal with a predetermined characteristic, and for comparing all of the sensed signals with the predetermined characteristic to determine the sensed signal having a predetermined quality and for setting an in-flight value of the phase angle signal equal to the phase angle associated with the determined sensed signal with the predetermined quality.

이 특허를 인용한 특허 (20) 인용/피인용 타임라인 분석

Heath Michael C., Active noise and vibration control system.
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Welsh William A. ; Yoerkie ; Jr. Charles A., Active noise control system for a defined volume.
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Welsh William A. ; Yoerkie ; Jr. Charles A., Active noise control system for a helicopter gearbox mount.
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Terpay, Gregory Weston; Zipfel, George G.; Welsh, William, Active system and method for vibration and noise reduction.
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Saucray, Jean-Michel; Chareyre, Philippe, Aircraft including an engine controlled by synchrophasing.
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Hyde, Roderick A.; Ishikawa, Muriel Y.; Jung, Edward K. Y.; Kare, Jordin T.; Myhrvold, Nathan P.; Tegreene, Clarence T.; Weaver, Thomas A.; Wood, Jr., Lowell L.; Wood, Victoria Y. H., Hybrid propulsive engine including at least one independently rotatable compressor rotor.
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Hyde, Roderick A.; Ishikawa, Muriel Y.; Jung, Edward K. Y.; Kare, Jordin T.; Myhrvold, Nathan P.; Tegreene, Clarence T.; Weaver, Thomas A.; Wood, Jr., Lowell L.; Wood, Victoria Y. H., Hybrid propulsive engine including at least one independently rotatable compressor stator.
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Hyde, Roderick A.; Ishikawa, Muriel Y.; Jung, Edward K. Y.; Kare, Jordin T.; Myhrvold, Nathan P.; Tegreene, Clarence T.; Weaver, Thomas Allan; Wood, Jr., Lowell L.; Wood, Victoria Y. H., Hybrid propulsive engine including at least one independently rotatable propeller/fan.
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Nouhaud, Christophe Claude Philippe, Method and device for synchrophasing the propellers of an aircraft with several propulsion units.
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Pla Frederic Ghislain, Method for reducing noise and/or vibration from multiple rotating machines.
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Wendelsdorf, Joseph W.; Berry, Victor L., Method for suppressing vibration and acoustic signature in a tiltrotor aircraft.
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Wilson, James A.; Barkley, Jr., Charles L.; Smith, Jr., Gerald; Cloud, Jeffrey B., Method for suppressing vibration in a tiltrotor aircraft.
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Gautier, Jr., Stanford Joseph; Mezenner, Rabah; Long, Randy, Methods and apparatus for manufacturing semiconductor devices.
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Antonios N. Kotoulas ; Charles Berezin ; Michael S. Torok ; Peter F. Lorber, Neural net controller for noise and vibration reduction.
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Kotoulas, Antonios N.; Berezin, Charles; Torok, Michael S.; Lorber, Peter F., Neural net controller for noise and vibration reduction.
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Borchers, Ingo Udo; Haeusler, Sigurd; Bauer, Michael; Drobietz, Roger; Gleine, Wolfgang, Process and apparatus for noise reduction in multi-engine propeller-driven aircraft.
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Schnetzka, Harold Robert; Eichelberger, Jr., E. Curtis; Nemit, Jr., Paul, System and method of operation of multiple screw compressors with continuously variable speed to provide noise cancellation.
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Welsh, William A., System for active noise reduction.
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McCaffrey, Michael G., Variable cycle turbine engine.
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Beckman, Brian C., Vehicle noise control and communication.
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[미국특허] Adaptive synchrophaser for reducing aircraft cabin noise and vibration 원문보기