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Improving Gas Turbine Engine Control System

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Improving Gas Turbine Engine Control System ( improving-gas-turbine-engine-control-system )

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Occasionally, engine manufacturers will recognize a customer need that is not satisfied by their existing product line. Ifthe business opportunity holds adequate promise for future revenue streams, a formal business case will be developed. As with most business case studies of complex products with relatively long life cycles (at least 30 years for most jet engine models), the more effort that is applied to the study, the more accurate the prediction of the potential revenue stream. Since these studies usually are internally funded, managers must make difficult decisions regarding the amount ofscarce engineering resources to apply to the studies. If the business case meets internally defined criteria for investment, revenue, and risk, the airline or airframer will be approached with an unsolicited proposal to re-engine an existing aircraft with the new product. The investment required to develop a new centerline powerplant with even modest technology incorporation can be quite substantial (in the hundreds of millions of dollars), therefore, some form ofcustomer commitment is usually negotiated prior to launching the engine development program. Since the control system itself does not produce thrust, butfacilitatesthe thrust- producing process of the turbomachinery by providing the proper inputs such as fuel metering and variable geometry positioning, there are only a few customer needs that are directly satisfied by the control system. Probably the most significant needs addressed directly by the control system are communicating operator commands and airframe data to the propulsion system and monitoring and communicating propulsion system health to the operators and maintainers (i.e. pilots and ground maintenance crew). Performing the latter task with a high degree of accuracy and comprehensiveness can substantially reduce the customer's cost of ownership of the propulsion system through reduced unnecessary maintenance (i.e. fewer "false calls"), more efficient resolution of on-condition maintenance (accurate troubleshooting), and the accurate 25

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Improving Gas Turbine Engine Control System

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