United Technologies Corporation

Douglas P Modeen

John E Games

Peter Joseph Padykula

Bhupindar Singh

Frank D Sundermeyer

Richard G Hubbard, Jr

Christopher E Paul

Steven R Fischer

Kristin M Devlin

Norman J Faust

A method of testing an actuation system for positioning an actuator, the actuation system including a primary electronic system, a secondary hydro-mechanical system is disclosed. The method includes the steps of measuring the actual position of the actuation device as set by the primary electronic system; measuring the system inputs and computing an ideal actuator position based thereon; determining the difference between the actual actuator position and the ideal position. The difference is then compared to a first threshold value which represents a disturbance beyond which the system cannot safely operate. Control is transferred from the primary control to the secondary control if the difference exceeds the first threshold. If the difference is less than the first threshold, the difference is compared to a second threshold value which represents an operating condition that can be tolerated for a period of time. Control is transferred from the primary control to secondary control if the difference exceeds the second threshold for longer than the time period.

Robust engine variable vane monitor logic

A velocity adaptive method for testing the control of dynamic devices of a system having a position schedule influenced by a dynamic factor is disclosed. The method includes the steps of introducing a step into the position schedule and causing a disturbance in the system; maintaining the step for an interval of time; removing the step; calculating step response by the system while accounting for the dynamic factor; and comparing the step response to a threshold value for determining one of the failure and successful operation of the control.

Velocity adaptive control test system

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.

Automatic engine hydro-mechanical control unit preflight test

A control method for managing a hydraulic control system of a vehicle is disclosed. The method includes the steps of scheduling the invocation of a plurality of vehicle functions through system operations, which functions are used for operating the vehicle; prioritizing the invocation of the vehicle functions and associated operations by the system; performing the operations based on prioritization created in the step of prioritizing; and superseding the performance of one of the operations with the performance of a higher priority one of the operations. This occurs if the higher priority operation arises for performance during the performance of the one of the operations. A related controller is also disclosed.

Controller and method of controlling a hydraulic control network with

A color raster scanner includes separate optical paths including a resolution aperture for resolution imaging and a separate, larger screen aperture for large area imaging; each aperture receiving the reflected source chart image through common collection optics including a combination objective lens and collimating optics which extend the optical length to provide increased gain magnification of the sensed image into the objective image plane; the image from the collection optics being presented by relay optics which divide the image into the two separate apertures, at different gain magnification values (field stop to provide the resolution aperture with the major portion of the available light flux, the larger diameter value of the screen aperture allowing it to receive the minor portion of the available flux at a relatively consistent spectral intensity.

Color raster scanner for recording cartographic data

A run-length encoder circuit for use in compacting data samples from a multicolor cartographic source chart includes hardware filtering which counts the number of incoming identical color samples and rejects them as noise unless they exceed a programmable count; the actual count value being dependent simultaneously on the number of incoming color samples and also the particular type of color, either a line color or an area color which was recognized as valid.

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Granby, CT, United States of America

Douglas P Modeen