Rolls-royce Corporation

Honeywell International Inc.

Sean Patrick Ellis

Cristian E Anghel

Wayne T Pearson

Marko Bacic

Nicholas Howarth

Huw Llewelyn Edwards

Glenn A Knight

Rory Douglas Stieger

Parag Vyas

Malcolm L Hillel

Mark G Challener

Alasdair Gardner

Glenn Knight

Mark Glyn Challener

A thrust demand signal is provided to a processor of a gas turbine engine and is modified, according to growth time constants of a rotor and/or a casing of the engine, in order to control the rotational speed or the rate of change of rotational speed of the engine so as to prevent contact between the rotor and the casing.

Control of a gas turbine engine

A method of controlling an aircraft gas turbine engine cooling system. The cooling system includes a heat exchanger having a first fluid path through which fan air flows, and a second fluid path through which relatively hot compressor air flows. The cooling system includes a valve configurable between an open position corresponding to a first operating mode, where fan air flows through the first path cooling the compressor air in the second path to a lower temperature, and a closed position corresponding to a second operating mode, where fan air may flow through the first path at a reduced rate, thus the compressor air in the second path could be cooled to a lesser extent. The valve is operated in first mode when the aircraft is in a descent mode, or when turbine entry temperature is above a predetermined amount. Otherwise, the valve is operated in second mode.

Method of controlling a cooling system

Apparatus for controlling a turbine aircraft engine may include apparatus to determine an amount of secondary power extraction from the engine, a secondary load processor configured to receive and condition secondary power extraction data. An electronic engine controller (EEC) may be configured to receive secondary load data from the secondary load processor and produce commands to open bleed-air valves of the engine, said commands being based on the secondary load data.

Optimized engine control using secondary power system horsepower extraction information

A method of constructing a piecewise linear engine performance model, comprises the steps of:

Engine performance model

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Derby, United Kingdom

Sean Patrick Ellis