Real-time modeling and simulation of a gas-turbine engine control system

The basic operating principles of an electronic digital computer gas turbine engine control system are presented. Closed loop turbine discharge temperature and speed controls have been implemented; their feasibility was demonstrated through hybrid digital/analog simulation and actual tests of a GE J85 turbojet engine through the start mode to maximum afterburner. Control mode description and results of the analysis and experimental runs are given in this paper.

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Real-Time Modeling Methods for Gas Turbine Engine Performance

10.4271/air4548 ◽

1995 ◽

Author(s):

Keyword(s):

Real Time ◽

Gas Turbine ◽

Engine Performance ◽

Gas Turbine Engine ◽

Turbine Engine ◽

Modeling Methods ◽

Time Modeling

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Full Authority Digital Engine Controller for Marine Gas Turbine Engine

Volume 2: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Environmental and Regulatory Affairs ◽

10.1115/gt2006-90439 ◽

2006 ◽

Author(s):

B. Githanjali ◽

P. Shobha ◽

K. S. Ramprasad ◽

K. Venkataraju

Keyword(s):

Control System ◽

Gas Turbine ◽

Gas Turbine Engine ◽

Engine Fuel ◽

Electronic Control ◽

Gas Generator ◽

Turbine Engine ◽

Engine Control System ◽

Control Units ◽

Commercial Off The Shelf

A full authority digital engine control system (FADEC) has been configured for the marine gas turbine engine being developed at the Gas Turbine Research Establishment, Bangalore, India. This paper presents the development of a prototype FADEC for this aero-derivative marine gas turbine engine. A dual-redundant architecture, with two identical digital electronic control units (DECU) in an active-standby configuration, was chosen to provide the necessary reliability, availability and maintainability. The system provides automatic control of engine fuel flow and compressor variable geometry, without exceeding parameter limits, so as to control either the speed of the gas generator or the power turbine in order to meet the power demanded. While the control units incorporate hardware and software features to detect and accommodate faults, an independent electronic trip system was included as a part of the overall control system to handle those situations resulting in uncontrolled overspeeding or safety interlock requirements. Recognizing the global trend towards the use of commercial off the shelf (COTS) technology, the system was configured with industry proven hardware and software. In addition, a hydro-mechanical backup control provides limited operational capability in the event of electronic control failure.

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