Optimal Gust Load Alleviation for a Flexible Aircraft

Optimal Gust Load Alleviation for a Flexible Aircraft Presented by: Nabil Aouf

Optimal Gust Load Alleviation for a Flexible Aircraft I-Introduction: Gust load alleviation (GLA) systems Longitudinal dynamics of the flexible B-52 bomber Optimal control techniques are designed

Optimal Gust Load Alleviation for a Flexible Aircraft II-GUST (TURBULENCE) MODEL: Von karman and Dryden models Generation of Dryden model:

Optimal Gust Load Alleviation for a Flexible Aircraft (1) An alternative use of the Dryden model: :

Optimal Gust Load Alleviation for a Flexible Aircraft III-FLEXIBLE AIRCRAFT MODEL: . Short period approximation of the rigid body mode. . Five flexible modes. . State space representation: (2)

Optimal Gust Load Alleviation for a Flexible Aircraft * Coupling structure:

Optimal Gust Load Alleviation for a Flexible Aircraft IV-Problem setup: Fig 2: Problem setup

Optimal Gust Load Alleviation for a Flexible Aircraft : : Fig 3: standard control problem setup

Optimal Gust Load Alleviation for a Flexible Aircraft V- in is embedded in the generalized plant

Optimal Gust Load Alleviation for a Flexible Aircraft VIa- b-

Optimal Gust Load Alleviation for a Flexible Aircraft * (3) , and (4)

Optimal Gust Load Alleviation for a Flexible Aircraft Fig 4: Norms of closed-loop transfer matrices

Optimal Gust Load Alleviation for a Flexible Aircraft VII-Time simulation: Fig 5: Gust signals and Open loop response.

Optimal Gust Load Alleviation for a Flexible Aircraft Fig 6: Control simulation

Optimal Gust Load Alleviation for a Flexible Aircraft Fig 7: Control simulation

Optimal Gust Load Alleviation for a Flexible Aircraft Fig 8: Control simulation

Optimal Gust Load Alleviation for a Flexible Aircraft VIII-Conclusion: . Gust signals representation and motivation of. Comparison of different modern type of control. . Future research. control.