| ZHAO Fei1，LAN Tian2，KAI Wen-jie1.Fault Accommodation of Fuel Signal for Turbine-Shaft Engine[J].航空发动机,2021,47(5):72-77 |
| Fault Accommodation of Fuel Signal for Turbine-Shaft Engine |
| DOI： |
| Key Words:fuel metering valve position signal fault accommodation servo loop corrector actuator turbo-shaft engine |
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| Abstract:After the failure of the position signal of the fuel metering valve of a turbo-shaft engine，the accommodation of artificial shut?
down was adopted. In order to improve the reliability and safety of the fuel system，a servo loop correction method was designed. After the
position signal of fuel metering valve failed，the corrected path gain was 1 through a in series corrector in the fuel servo loop. By calculating
the appropriate current to continue to control the fuel actuator，the engine shutdown could be avoided and the engine stability control could
be realized. A high-precision mathematical model of fuel actuator was identified on a semi-physical tester by sweep frequency method
based on single point integration，and the control parameters of corrector were designed by the model. The simulation model，the semi-phys?
ical tester of the control system and the ground test bench of the engine were tested and verified for fuel system with corrector added. The
test results show that the servo loop correction method can effectively control the engine to work stably under certain condition after the po?
sition signal of fuel metering valve fails. |
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