Patent ID: 11898498
Assignee: ROLLS-ROYCE PLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 9:
10. A method for controlling an apparatus of a gas turbine having at least a first shaft and a second shaft that are rotatable, the method comprising:
controlling rotation of at least one chosen from the first and second shafts depending on a speed ratio of speeds, wherein controlling rotation of the at least one chosen from the first and second shafts depending on the speed ratio is performed so as to avoid an integer ratio of speeds of the first and second shafts;
determining a level of vibrations at the apparatus and comparing the level of vibrations with a predetermined threshold, wherein controlling rotation of at least one of the shafts depending on a speed ratio R of speeds of the shafts is performed when the level of vibrations exceeds the predetermined threshold.