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neptune
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 Posted: Aug 05, 2012 - 10:05 PM
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Elite 1K
Joined: Oct 24, 2008 - 01:03 AM
Posts: 1165
Location: Houston
Status: Offline
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Software Releases Configurations For F-35 Lightning II JSF (Analysis)
http://www.aviationreportglobal.com/201 ... ng-ii-jsf/
Software Releases Configurations For F-35 Lightning II JSF (Analysis)
April 3, 2012
...Software development involving the F-35 Lightning II sub systems is seeing multiple configurations being developed simultaneously as the new aircraft is progressing towards reaching initial operational capabilities later in the decade. .. In the F-35 case, multiple teams are working on various software releases hoping to merge capabilities at a future stage of maturity. As a result various timetables describe the scope of remaining work done against the aircraft’s sub systems architecture. ..
The F-35 presents major systems components whose functionality..software-enabled capabilities (flight sciences, training systems, etc)... the aircraft program is seeing a greater share of software development and integration bound to the innovative Prognosis Health Management System (PHM) and the powerful Autonomic Logistics Information Systems (ALIS) management and planning tool.
Autonomic Logistics Information Systems (ALIS)
ALIS is ... a major software development and integration ... The system is designed to improve the aircraft maintainability by providing direct visibility horizontally across maintenance, support, pilot, mission, logistics etc.. functions. In that realm, spare parts can be produced and inventoried in keeping with ALIS-generated components life cycle model. It forms a high value distributed information system implementing best practice Enterprise Supply Chain Management. In fact ALIS is at the heart of the F-35 JSF achieving major requirement of guaranteed “low cost” logistics throughout the targeted 30 years (or 8,000 flight hours) of service life.
Structural Prognostic Health Management System (PHM)
With both on-board and off-board sub systems components, the F-35 Prognosis Health Management systems (PHM) plays the critical role of orchestrating the data flow between aircraft sensors linked to ALIS ground stations.... forecasting optimized towards the 8,000 flight hours/30 years service life target).
PHM Sensor Fusion
The sensor fusion paradigm promulgated by the PHM provides data as diverse as:
-Inertia and Strain sensor data (longitudinal, normal, lateral acceleration at the center of gravity) ,
-Engine Data (estimated total gross thrust feedback, estimated main nozzle thrust, main engine core speed, engine fan speed, ready to convert to jet, lift fan nozzle, pitch angle position,estimated lift fan thrust, estimated left and right roll nozzle thrust feedback, lift fan speed -physical/RPM, lift fan clutch status word),
-Control Surface (left & right flaperon angular position, left & right horizontal tail angular position, left & right vertical tail angular position),
-Air Data (angle of attack, static pressure measured, angle of sideslip, mach number, true airspeed, altitude rate) etc.
... etc.
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