MULTIDISCIPLINARY OPTIMIZATION OF AIRCRAFT PARAMETERS BY THE LOCAL DISTRIBUTED CRITERIA METHOD

摘要

The philosophy of the new approach to multidisciplinaryrnoptimization of aircraft parametersrnby a target criterion are formulated in view ofrnrequirements of aerodynamics, flight dynamicsrn& control, and strength. The idea of a local decompositionrnof the initial problem into monodisciplinaryrnsubtasks with special criteria-LocalrnDistributed Criteria (LDC), is used. Thernregular method of LDC formation is proposedrnon the basis of sensitivity functions. These functionsrnresult from transformation of adjoint variablesrnand Lagrangian multipliers extractedrnfrom the rigorous solution of the aircraft trajectoryrnoptimization problem by the target criterionrnwith use of the indirect method-the Pontryaginrnmaximum principle. The LDC, on thernone hand, give monodisciplinary subtasks anrnindependent access to the unified target criterion,rnand on the other hand, take into accountrnthe specific contribution of all aircraft flightrnphases.rnThe LDC approach application for thernlauncher parameter optimization is described.rnThe qualitatively new solutions are demonstrated.