Automatic engine hydro-mechanical control unit preflight test

Details Automatic engine hydro-mechanical control unit preflight test Automatic engine hydro-mechanical control unit preflight test

1998-02-03

1999-08-17

Lopez, F. Daniel

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

By shaft speed or torque responsive means

415 17, 415 36, 415 42, 415 48, 415 49, 415 50, 415 16, 415118, 731182, 73 179, F01D 1726, F01D 1720

Patent

active

059384018

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.

REFERENCES:
patent: 4279568 (1981-07-01), Munroe
patent: 4610599 (1986-09-01), Long

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