Full Authority Digital Engine Controller for Marine Gas Turbine Engine

Abstract

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.

Conceptual Study on Integration of Engine Health Monitoring (EHM) System with Integrated Vehicle Health Monitoring (IVHM) System

“…This paper is an attempt to bring out Conceptual Study on Integration of Engine Health Monitoring (EHM) System with Integrated Vehicle Health Monitoring (IVHM) System. The concepts of control system have been attempted during the previous in house design attempts and have been captured and analysed for its usability and improvements (Githanjali, et al May 8-11, 2006). The study made in this paper will bring out SE approach to manifest the various scenarios during operational role of control system for EHMS.…”

“…EMS will interface with each lane of FADEC through a digital bus. EMS shall have access to engine health related FADEC data (Githanjali, et al May 8-11, 2006). Suitable codes shall be generated by EMS to indicate the health of the engine.…”

Aircraft Turbine Engine Automatic Control Based on Adaptive Dynamic Models

“…The scheme for such system is shown in Fig. 6, examples of its realization are given in the papers [13][14][15][16][17][18][19][20]. When a fault is detected, corrective action will be generated.…”

Full Authority Digital Engine Control: Overall System, Function and its Application

“…FADEC with situational control methodology approach with gating neural network having situational frames and controller system to handle it was used [3].B Githanjali et al, presented their work for development of FADEC for aero-derivative marine gas turbine engine. By including the complicated controls, method for fault identification, improved actuator, sensor and fuel system design, FADEC offers important and economical benefits to engine control of marine propulsion system and has provided suitable control requirements of engine and fault withstanding features [4].S R Balakrishnan [6] discussed the bottom to top approach considering engine requirement and developing control system to required level. At starting gas turbine engines had electromechanical system then it switched to electronic system and then integration with electronic system followed by audit process and finally verification and validation [5].…”