Automatic engine hydro-mechanical control unit preflight test
US5938401A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Feb 3, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D21/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of testing an actuation system for positioning an inlet guide vane, the actuation system including a primary electronic system, a secondary hydro-mechanical system is disclosed. The method includes the steps of controlling the position of the inlet guide vane with the primary system from an start engine speed up to a first engine speed; transferring control of the position of the inlet guide vane from the primary system to the secondary system at said first engine speed; controlling the position of the inlet guide vane with the secondary system from the first engine speed up to a second engine speed; obtaining a monitored position of the inlet guide vane with the primary system from said first speed to said second speed; indicating a failed status if the monitored position obtained by the primary system does not correspond to a predicted position; and transferring control from the secondary system to the primary system for the engine speeds of said second speed or greater, in absence of said failed status.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.