Torsional mode suppressor
US4531361A · kind A · utility
10Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1984 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Feb 13, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/96
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Damping of a helicopter rotor drive train, the drive train including the free turbines of a gas turbine engine propulsion system, the aircraft main and tail rotors, and associated shafts and gears, is accomplished through active modulation of the fuel flow to the engine gas generator. The fuel flow is varied such that a transient torque will be developed by the free turbines which is opposite in phase to drive train resonances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.