Electronic propeller control system

Details Electronic propeller control system Electronic propeller control system

1999-02-04

2000-05-09

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Impeller rotation speed responsive

416 43, 416 44, 416 47, 416 49, 416 61, 416153, B63H 308

Patent

active

060595280

ABSTRACT:
An improved electronic hydraulic propeller control designed as a retro-fit kit for existing Hamilton Standard Division 54460 and 54H60 propeller controllers includes an apparatus for controlling the pitch angle of a propeller blade. The retro-fit kit includes an electro-hydraulic servo valve, an electronic controller, a protection valve, and a propeller maintenance interface panel. These components functionally replace the existing hydromechanical propeller control system without reconfiguration of the existing interface. The apparatus converts mechanical inputs of the propeller and airframe systems to electronic signals, which can be measured by the electronic control. The apparatus also receives and converts the electronic control's commands into hydraulic pressure and flow changes through an electro-hydraulic servo valve. The electronic controller performs the required calculations to interpret and then react to changes in the propeller/airframe systems. The electronic controller has two channels in a master/slave configuration to provide back up control of 90% of all functionality. Back-up systems are implemented through a protection valve, which can override hydraulic inputs from the electro-hydraulic servo valve. The propeller maintenance interface panel provides a link between the aircraft personnel and the propeller system to allow for calibration, fault interrogation, and real time data display.

REFERENCES:
patent: 2980188 (1961-04-01), Allen, Jr. et al.
patent: 3004608 (1961-10-01), Pond
patent: 3973873 (1976-08-01), Shank
patent: 5037271 (1991-08-01), Duchesneau et al.
patent: 5174718 (1992-12-01), Lampeter et al.

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