Implementation of Active and Passive Load Alleviation Methods on a Generic mid-Range Aircraft Configuration

Abstract

The influence of passive and active load alleviation methods on the structure weight has been investigated on the wing of a Generic Mid-Range aircraft configuration. The models have been created with ModGen, an in-house program at DLR-AE (Institute of Aeroelasticity, DLR German Aerospace Center). The models comprise FE-models for the structure and masses, as well as DLM (Doublet-Lattice-Method) model for the aerodynamics. For the investigation of the influence of the loads alleviation systems a loop of loads analyses and subsequent structure sizing has been conducted. The loads analyses consist of gust and maneuver simulations. For the passive loads alleviation an aeroelastic tailoring of the wing structure has been implemented, whereas for the active loads alleviation the ailerons are deflected to redistribute lift during maneuvers and to partially compensate lift increment during gust encounters.