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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that the engine meets functional requirements but is not involved in the cost/weight allocation process, modules where cost and weight are heavily influenced by functional requirements (such as the control system) are destined for significant conflict in the attempt to meet all requirements. Although one of the roles of the Chief Engineer is to resolve technical conflicts and issues, the basic conflict of cost and weight requirements versus functional requirements in essence originates within the SDCI/PSA organizations. To be fair, equitable allocation of cost and weight is an extremely difficult task and is essentially a no-win situation for the Chief Engineer. All modules must be challenged to achieve aggressive cost and weight targets at the propulsion system level. However, if a process exists that ties functional requirements to cost and weight allocations, it is not evident. Another organizational process issue that may be a bit more manageable concerns reallocation or transfer of cost/weight target for subsystem Integrated Product Teams (IPTs) that cross module center boundaries. When an IPT is formed for a module or subsystem that crosses module center boundaries (such as variable geometry actuation in which the fan, compressor, or nozzle owns the variable geometry, but controls owns the actuation system), there is no formal process to equitably reallocate cost/weight based on trade studies that result in an overall propulsion system cost/weight reduction. This is particularly detrimental when additional cost/weight is taken on by one module center to allow the other to gain a cost/weight reduction resulting in an overall reduction at the system level. This behavior tends to stifle creativity and innovative thinking if team members believe they will not receive some reward (in the form of additional component weight/cost allocation) for ideas that result in a system improvement. 120

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