IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0521269
(1983-08-08)
|
우선권정보 |
JP-0137916 (1982-08-10); JP-0137917 (1982-08-10); JP-0120561 (1982-08-10) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Nissan Motor Company, Limited
|
대리인 / 주소 |
Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans
|
인용정보 |
피인용 횟수 :
18 인용 특허 :
6 |
초록
▼
An apparatus for controlling a gas turbine engine. A control device is provided for controlling the energy conversion function of the engine. Adjustments of the control device are obtained by comparing an actual value of a condition of the engine with a demand value of the engine condition to produc
An apparatus for controlling a gas turbine engine. A control device is provided for controlling the energy conversion function of the engine. Adjustments of the control device are obtained by comparing an actual value of a condition of the engine with a demand value of the engine condition to produce an error between the actual and demand values and calculating a value corresponding to a setting of the control device to reduce the error to zero. A surge detector generates a surge detection signal when engine surge intensity exceeds a reference level. The engine condition demand value is modified based upon the surge detection signal to suppress the engine surge.
대표청구항
▼
1. An apparatus for controlling a gas turbine engine having a gas turbine gas generator including a compressor and a compressor turbine, a separate power turbine driven by said gas generator, and means for adjusting at least one controlled variable which determines a condition of said gas turbine en
1. An apparatus for controlling a gas turbine engine having a gas turbine gas generator including a compressor and a compressor turbine, a separate power turbine driven by said gas generator, and means for adjusting at least one controlled variable which determines a condition of said gas turbine engine, which condition is related to engine surge, comprising: (a) a surge sensor sensing the intensity of engine surge; (b) an actual signal generator for generating an electrical actual signal indicative of an actual value of said gas turbine engine condition; (c) a demand signal generator for generating an electrical demand signal indicative of a demand value of said gas turbine engine condition; (d) means for comparing said actual signal with said demand signal to generate an error signal indicative of the difference between said actual and demand values; (e) means for calculating a value corresponding to a setting of said controlled variable adjusting means to reduce said error signal to zero; (f) a surge detecting circuit for generating a surge detection signal when the sensed surge intensity exceeds a reference level; and (g) a control circuit for modifying said demand value based upon said surge detection signal to avoid the engine surge, said control circuit subtracting from said demand value, a control signal that increases at a high rate to a predetermined value and then decreases to its initial value at a low rate. 2. An apparatus for controlling a gas turbine engine having a gas turbine gas generator including a compressor and a compressor turbine, a separate power turbine driven by said gas generator, and means for controlling the fuel flow to said gas generator, comprising: (a) a surge sensor for sensing the intensity of engine surge; (b) an actual signal generator for generating an electrical actual signal indicative of an actual value of the speed of said gas generator; (c) a demand signal generator for generating an electrical demand signal indicative of a demand value of the gas generator speed; (d) means for comparing said actual signal with said demand signal to generate an error signal indicative of the difference between said actual and demand values; (e) means for calculating a value corresponding to said error signal for controlling the fuel flow to said gas generator to reduce said error signal to zero; (f) a surge detecting circuit for generating a surge detection signal when the sensed surge intensity exceeds a reference level; and (g) a control circuit for modifying said gas generator speed demand value based upon said surge detection signal to avoid engine surge, said control circuit subtracting, from said gas generator speed demand value, a control signal that increases at a high rate to a predetermined value and then decreases to its initial value at a low rate. 3. An apparatus for controlling a gas turbine engine having a gas turbine gas generator including a compressor and a compressor turbine, a separate power turbine driven by said gas generator, and means for controlling the temperature at the inlet of said compressor turbine, comprising: (a) a surge sensor sensing the intensity of engine surge; (b) an actual signal generator for generating an electrical actual signal indicative of the temperature at the inlet of said compressor turbine; (c) a demand signal generator for generating an electrical demand signal indicative of a demand value of the compressor turbine inlet temperature; (d) means for comparing said actual signal with said demand signal to generate an error signal indicative of the difference between said actual and demand values; (e) means for calculating a value corresponding to said error signal for controlling the temperature at the inlet of said compressor turbine to reduce said error signal to zero; (f) a surge detecting circuit for generating a surge detection signal when the sensed surge intensity exceeds a reference level; and (g) a control circuit for modifying said compressor turbine inlet temperature demand value based upon said surge detection signal to avoid engine surge, said control circuit subtracting, from said temperature demand value, a control signal that increases at a high rate to a predetermined value and then decreases to its initial value at a low rate. 4. The apparatus of claim 1, wherein said surge detecting circuit comprises a first comparator for comparing the sensed surge intensity with a background noise level to generate a surge indication signal when said sensed surge intensity exceeds said background noise level, an integrator for integrating said surge indication signal to generate an integrated signal, and a second comparator for comparing said integrated signal with a reference value to generate said surge detection signal and pass said surge detection signal to said control circuit when said integrated signal exceeds the reference value. 5. The apparatus of claim 4, wherein said surge detecting circuit comprises means for reducing said background noise level for a predetermined time period after said surge detection signal occurs. 6. The apparatus of claim 1, which further comprises means responsive to said surge detection signal for providing an indication whenever said control circuit is modifying said demand value based upon said surge detection signal. 7. The apparatus of claim 1, wherein said control circuit comprises a monostable device responsive to said surge detection signal from said surge detecting circuit for generating a pulse signal having a predetermined pulse width, an integrator responsive to the pulse signal from said monostable device for generating said control signal that increases at a high rate to a predetermined value and then decreases at a low rate, and a subtractor for subtracting said control signal from said engine condition demand signal to generate a signal indicative of the difference therebetween. 8. The apparatus of claim 1, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for modifying said demand signal to avoid engine surge regardless of engine operating conditions. 9. The apparatus of claim 1, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for providing an indication whenever a failure is detected in said surge sensor. 10. The apparatus of claim 2, wherein said surge detecting circuit comprises a first comparator for comparing the sensed surge intensity with a background noise level to generate a surge indication signal when said sensed surge intensity exceeds said background noise level, an integrator for integrating said surge indication signal to generate an integrated signal, and a second comparator for comparing said integrated signal with a reference value to generate said surge detection signal and pass said surge detection signal to said control circuit when said integrated signal exceeds said reference value. 11. The apparatus of claim 10, wherein said surge detecting circuit comprises means for reducing said background noise level for a predetermined time period after said surge detection signal occurs. 12. The apparatus of claim 2, which further comprises means responsive to said surge detection signal for providing an indication whenever said control circuit is modifying said gas generator speed demand signal based upon said surge detection signal. 13. The apparatus of claim 2, wherein said control circuit comprises a monostable device responsive to said surge detection signal from said surge detecting circuit for generating a pulse signal having a predetermined pulse width, an integrator responsive to the pulse signal from said monostable device for generating said control signal that increases at a high rate to a predetermined value and then decreases at a low rate, and a subtractor for subtracting said control signal from said gas generator speed demand signal to generate a signal indicative of the difference therebetween. 14. The apparatus of claim 2, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for modifying said gas generator demand signal to avoid engine surge regardless of engine operating conditions. 15. The apparatus of claim 2, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for providing an indication whenever a failure is detected in said surge sensor. 16. The apparatus of claim 2, wherein said demand signal generator comprises means for generating a signal indicative of the amount of depression of an accelerator pedal, a low-pass filter receiving said accelerator pedal depression indication signal to generate a filtered signal, and means responsive to said filtered signal for generating said gas generator speed demand signal. 17. The apparatus of claim 16, wherein said surge detecting circuit comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and wherein said low-pass filter includes an RC integrator comprised of a capacitor and a series circuit of first and second resistors, and a normally closed switch connected in parallel with said second resistor, said switch opening in response to said failure indication signal. 18. The apparatus of claim 3, wherein said means for controlling the temperature at the inlet of said compressor turbine comprises means for varying the effective area of a gas passage connected between said compressor turbine and said power turbine. 19. The apparatus of claim 3, wherein said surge detecting circuit comprises a first comparator for comparing the sensed surge intensity with a background noise level to generate a surge indication signal when said sensed surge intensity exceeds said background noise level, an integrator for integrating said surge indication signal to generate an integrated signal, and a second comparator for comparing said integrated signal with a reference value to generate a surge detection signal and pass said surge detection signal to said control circuit when said integrated signal exceeds said reference value. 20. The apparatus of claim 14, wherein said surge detecting circuit comprises means for reducing said background noise level to zero for a predetermined time period after said surge detection signal occurs. 21. The apparatus of claim 3, which further comprises means responsive to said surge detection signal for providing an indication whenever said control circuit is modifying said temperature demand signal based upon said surge detection signal. 22. The apparatus of claim 3, wherein said control circuit comprises a monostable device responsive to said surge detection signal from said surge detecting circuit for generating a pulse signal having a predetermined pulse width, an integrator responsive to the pulse signal from said monostable device for generating said control signal that increases at a high rate to a predetermined value and then decreases at a low rate, and a subtractor for subtracting said control signal from said temperature demand signal to generate a signal indicative of the difference therebetween. 23. The apparatus of claim 3, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for modifying said temperature demand signal to avoid engine surge regardless of engine operating conditions. 24. The apparatus of claim 3, which further comprises means for detecting a failure in said surge sensor to generate a failure indication signal, and means responsive to said failure indication signal for providing an indication whenever a failure is detected in said surge sensor. 25. The apparatus of claim 3, wherein said demand signal generator comprises means for generating an actual speed signal indicative of the speed of rotation of said gas generator, means for generating a signal indicative of the air temperature at the inlet of said gas generator, and means for modifying said gas generator actual speed indication signal based upon said air temperature indication signal to generate a modified signal, means for generating said temperature demand signal as a function describing a relationship between said modified signal and said temperature demand signal. 26. The apparatus of claim 25, wherein said means for generating said temperature demand signal is responsive to said surge detection signal for reducing said temperature demand signal by a predetermined value to avoid engine surge regardless of engine operating conditions.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.