ENGINE-INDUCED AIRCRAFT CABIN RESONANCE REDUCTION SYSTEM AND METHOD

摘要

A system and method of reducing engine induced aircraft cabin resonance includes sensing the core engine speed of a first turbofan gas turbine engine, and sensing the core engine speed of a second turbofan gas turbine engine. In a control system, the core engine speed of the first turbofan gas turbine engine and the core engine speed of the second turbofan gas turbine engine are processed to determine a core engine speed difference between the first and second turbofan gas turbine engines. The core engine speed difference is processed to supply a variable inlet guide vane (VIGV) offset value. The VIGV offset value is applied to a VIGV reference command associated with one of the first or second turbofan gas turbine engine to thereby cause the VIGVs of one of the first or second turbofan gas turbine engine to move to a more closed position.

主权项

1. A method of reducing engine induced aircraft cabin resonance, comprising the steps of:
sensing core engine speed of a first turbofan gas turbine engine; sensing core engine speed of a second turbofan gas turbine engine; and in a control system:
processing the core engine speed of the first turbofan gas turbine engine and the core engine speed of the second turbofan gas turbine engine to determine a core engine speed difference between the first and second turbofan gas turbine engines;processing the core engine speed difference to supply a variable inlet guide vane (VIGV) offset value; andapplying the VIGV offset value to a VIGV reference command associated with one of the first or second turbofan gas turbine engine, to thereby cause the VIGVs of one of the first or second turbofan gas turbine engine to move to a more closed position.