Helicopter power plant control
US3963372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1975 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Jan 17, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02C9/42
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control system for a helicopter power plant with three power units driving the lifting rotor system. Each power unit comprises a gas-coupled gas turbine engine, a hydromechanical fuel control receiving electrical inputs to set a gas generator governor, an engine electronic control, and engine accessories. Power plant operation is normally controlled by the pilot through condition levers and switches on a control quadrant, through a collective pitch control for the rotor blades, and through a master beeper switch which is operable to trim the setting of a rotor speed governor and the gas generator governors. A condition lever transmits a speed command signal through the electronic control of each power unit to its gas generator governor. A collective pitch signal from the rotor control system is another factor in setting the gas generator governor of each unit. The power plant includes a power management control which equalizes the power outputs of the engines and includes the rotor isochronous governor. The power management control receives inputs of rotor system speed command and actual rotor speed, and of the torques of the individual power plants and transmits a governor trim …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.