[특허]Master-slave engine bleed flow sharing control method and system

Honeywell International Inc.

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Master-slave engine bleed flow sharing control method and system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02L-006/08 F02C-006/08
미국특허분류(USC)	060/782; 060/785; 060/795; 454/074
출원번호	US-0349434 (2003-01-22)
발명자 / 주소	Liu, Guang Jun Lam, Chun Ho
출원인 / 주소	Honeywell International Inc.
대리인 / 주소	Palguta Larry J.
인용정보	피인용 횟수 : 4 인용 특허 : 11

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A system and method for an engine bleed flow-sharing control system is disclosed. For a multi-engine bleed system, one ( 10 ) of the engines is selected as the master channel ( 15 ) such that the bleed air supply pressure of the control system receiving the bleed air is controlled ( 11, 12, 13 ) to achieve a desirable supply pressure range. To slave the other engine airflow control channels ( 25, 35, 45 ), the airflow rate ( 14 ) is also measured in the master channel ( 15 ) and the measured airflow rate is used as the airflow setpoint for other channels...

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1. A system for substantially equalizing the flow of bleed air extracted from a plurality of engines for delivery to a common bleed air duct, comprising:a common pressure sensor disposed to measure pressure at said common bleed air duct and generate a measured pressure signal;a master channel disposed to pass engine bleed air from a master engine to said common bleed air duct, said master channel comprising:a master valve disposed to receive bleed air supply from said master engine and regulate bleed air supply pressure;a master flow sensor disposed downstream from said master valve to measure bleed air flow to generate a master flow signal;a master controller disposed to compare a predetermined pressure signal with said measured pressure signal to generate a master error signal, said master error signal being applied to control said master valve;at least one slave channel disposed to pass engine bleed air from at least one slave engine to a common bleed air duct;a slave valve disposed to receive bleed air from said slave engine and regulate bleed airflow;a slave flow sensor disposed downstream from said slave valve to measure bleed airflow and generate a slave flow signal;a slave controller disposed to compare said master flow signal with said slave flow signal to generate a slave flow error signal, said slave flow error signal being applied to control said slave valve. 2. The system of claim 1, wherein:said master controller comprises:a master summing junction disposed to receive said predetermined pressure signal and said measured pressure signal, said summing junction disposed to generate an error signal by subtracting said measured pressure signal from said predetermined pressure signal;a master controller/amplifier disposed to amplify said error signal and apply the amplified error signal to said master valve;said slave controller comprises:a slave summing junction disposed to receive said master flow signal and said slave flow signal, said slave summing junction disposed to generate an error signal by subtracting said slave flow signal from said master flow signal;a slave controller/amplifier disposed to amplify said error signal and apply the amplified error signal to said slave valve. 3. The system of claim 1, wherein each of said master and slave valves is pressure regulator controllably operated by said master controller and said slave controller, respectively. 4. The system of claim 1, wherein each of said master and slave valves comprises one of a valve and an actuator having an area controllably operated by said master controller and said slave controller, respectively. 5. The system of claim 1, wherein each of said master and slave flow sensors comprise a delta-P transducer. 6. The system of claim 1, wherein each of said master and slave flow sensors comprises an anemometer. 7. The system of claim 1, wherein each of said master and slave flow sensors is one of a fluidic, a pneumatic, a ultrasonic and an electromagnetic sensor. 8. The system of claim 1, wherein each of said master and slave controllers is one of a digital/analog or a pneumatic controller. 9. The system of claim 1, wherein each of said master and slave controllers is a fluidic controller. 10. A system for substantially equalizing the flow of bleed air extracted from a plurality of engines for delivery to a common bleed air duct, comprising:common pressure sensor means for measuring pressure of bleed air of said common bleed air duct and generating a measured pressure signal;a master channel disposed to pass engine bleed air from a master engine to said common bleed air duct, said master channel comprising:master valve means for receiving bleed air supply from said master engine and regulating bleed air supply pressure;master flow sensor means coupled to said master valve means for measuring bleed air flow and generating a master flow signal;master controller means for controlling said master valve means by comparing a predetermined pressure signa l with saidmeasured pressure signal;a slave channel disposed to pass engine bleed air from a slave engine to a common bleed air duct;slave valve means for receiving bleed air from said slave engine and regulating one of pressure of bleed airflow and valve opening area;slave flow sensor means for measuring bleed airflow and generating a slave flow signal;slave controller means for controlling said slave valve means, by comparing said master flow signal with said slave flow signal. 11. A system of claim 10, wherein said salve controller means comprises:a summing junction disposed to subtract said slave flow signal from said master flow signal to generate a slave error signal;a controller/amplifier unit disposed to amplify said slave error signal. 12. A system of claim 10, wherein said master controller means comprises:a summing junction disposed to subtract said measured pressure signal from said predetermined pressure signal to generate a master error signal;a controller/amplifier unit disposed to amplify said master error signal. 13. The system of claim 10, wherein each of said master and slave valve means comprises a pressure regulator. 14. The system of claim 10, wherein each of said master and slave valve means comprises one of a valve and an actuator. 15. A system for substantially equalizing the flow of bleed air extracted from a plurality of engines for delivery to a common bleed air duct, comprising:a master channel disposed to pass engine bleed air from a master engine to said common bleed air duct, said master channel comprising:a master valve disposed to receive bleed air supply from said master engine and regulate pressure of bleed air supply in said master channel;a common pressure sensor disposed downstream from said master valve to measure pressure of bleed air of said master channel and generate a measured pressure signal;a master flow sensor disposed downstream from said master valve to measure bleed air flow of said master channel to generate a master flow signal;a master controller disposed to control said master valve, by comparing a predetermined pressure signal with said measured pressure signal to generate a master error signal;at least one slave channel disposed to pass engine bleed air from at least one slave engine to a common bleed air duct;a slave valve disposed to receive bleed air from said slave engine and regulate one of pressure of bleed air flow and valve opening area in said slave channel;a slave flow sensor disposed downstream from said slave valve to measure bleed air flow of said slave channel and generate a slave flow signal;a slave controller disposed to control said slave valve, by comparing said master flow signal with said slave flow signal to generate a slave error signal. 16. The system of claim 15, wherein:said master controller comprises:a master summing junction disposed to receive said predetermined pressure signal and said measured pressure signal, said summing junction disposed to generate an error signal by subtracting said measured pressure signal from said predetermined pressure signal;a master controller/amplifier disposed to amplify said error signal and apply the amplified error signal to said master valve;said slave controller comprises:a slave summing junction disposed to receive said master flow signal and said slave flow signal, said slave summing junction disposed to generate an error signal by subtracting said slave flow signal from said master flow signal;a slave controller/amplifier disposed to amplify said error signal and apply the amplified error signal to said slave valve. 17. The system of claim 15, wherein each of said master and slave valves is pressure regulator controllably operated by said master controller and said slave controller, respectively. 18. The system of claim 15, wherein each of said master and slave valves comprises one of a valve and an actuator having an area controllably operated by said master controller and said slave controller, respec tively. 19. The system of claim 15, wherein each of said master and slave flow sensors comprise a delta-P transducer. 20. The system of claim 15, wherein each of said master and slave flow sensors comprises an anemometer. 21. The system of claim 15, wherein each of said master and slave flow sensors is a fluidic sensor. 22. The system of claim 15, wherein each of said master and slave flow sensors is an ultrasonic sensor. 23. The system of claim 15, wherein each of said master and slave flow sensors is an electromagnetic sensor. 24. The system of claim 15, wherein each of said master and slave controllers is one of a digital/analog and a pneumatic controller. 25. The system of claim 15, wherein each of said master and slave controllers is a fluidic controller. 26. A system for substantially equalizing the flow of bleed air extracted from a plurality of engines for delivery to a common bleed air duct, comprising:a master channel disposed to pass engine bleed air from a master engine to said common bleed air duct, said master channel comprising:master valve means for receiving bleed air from said master engine and regulating pressure of bleed air flow in said master channel;master pressure sensor means for measuring pressure of said master channel and generating a measured pressure signal;master flow sensor means coupled to said master valve means for measuring bleed air flow of said master channel and generating a master flow signal;master controller means for controlling said master valve means by comparing a predetermined pressure signal with said measured pressure signal;a slave channel disposed to pass engine bleed air from a slave engine to a common bleed air duct;slave valve means for receiving bleed air from said slave engine and regulating one of pressure of bleed air flow and valve/actuator opening area in said slave channel;slave flow-sensor means for measuring bleed airflow of said slave channel and generating a slave flow signal;slave controller means for controlling said slave valve means, by comparing said master flow signal with said slave flow signal. 27. A system of claim 26, wherein said salve controller means comprises:a summing junction disposed to subtract said slave flow signal from said master flow signal to generate a slave error signal;a controller/amplifier unit disposed to amplify said slave error signal. 28. A system of claim 26, wherein said master controller means comprises:a summing junction disposed to subtract said measured pressure signal from said predetermined pressure signal to generate a master error signal;a controller/amplifier unit disposed to amplify said master error signal. 29. The system of claim 26, wherein each of said master and slave valve means comprises a pressure regulator. 30. The system of claim 26, wherein each of said master and slave valve means comprises one of a valve and an actuator. 31. A method of substantially equalizing bleed air flow of a plurality of channels from a plurality of engines to a common air duct, comprising the steps of:a) designating a master channel and a plurality of slave channels from among said channels;b) obtaining master error signal based on a difference between pressure at said common air duct and a predetermined setpoint pressure;c) regulating pressure of said master channel by using said master error signal;d) measuring airflow rate of said master channel to generate master airflow rate;e) measuring airflow rate of each slave channel to generate slave airflow rate;f) obtaining slave error signal based on a difference between said master airflow rate and said slave airflow rate of a corresponding slave channel;g) regulating one of pressure and valve/actuator opening area of each slave channel by using said slave error signal. 32. The method of claim 31, wherein the step of obtaining master error signal comprises:subtracting said pressure at said common air duct from said predetermined setpoint pressure to generate a difference signal;amplif ying said difference signal to generate said master error signal. 33. The method of claim 32, wherein the step d) of measuring airflow comprises using an airflow sensor. 34. The method of claim 32, wherein the step e) of measuring airflow rate comprises using an airflow sensor. 35. The method of claim 31, wherein the step of obtaining slave error signal comprises:subtracting slave airflow rate from master airflow rate to generate a difference signal;amplifying said difference signal to generate said slave error signal. 36. A method of substantially equalizing bleed air flow of a plurality of channels from a plurality of engines to a common air duct, comprising the steps of:a) designating a master channel and a plurality of slave channels from among said channels;b) obtaining master error signal based on a difference between pressure at said master channel and a predetermined setpoint pressure;c) regulating pressure of said master channel by using said master error signal;d) measuring airflow rate of said master channel to generate master airflow rate;e) measuring airflow rate of each slave channel to generate slave airflow rate;f) obtaining slave error signal based on a difference between said master airflow rate and said slave airflow rate of a corresponding slave channel;g) regulating one of pressure and valve/actuator opening area of each slave channel by using said slave error signal. 37. The method of claim 36, wherein the step of obtaining master error signal comprises:subtracting said pressure of said master channel from said predetermined setpoint pressure to generate a difference signal;amplifying said difference signal to generate said master error signal. 38. The method of claim 37, wherein the step d) of measuring airflow comprises using an airflow sensor. 39. The method of claim 37, wherein the step e) of measuring airflow rate comprises using an airflow sensor. 40. The method of claim 37, wherein the step of obtaining slave error signal comprises:subtracting slave airflow rate from master airflow rate to generate a difference signal;amplifying said difference signal to generate said slave error signal.

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이 특허를 인용한 특허 피인용횟수: 4

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Master-slave engine bleed flow sharing control method and system

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