H Infinity Robust Control for Gust Load Alleviation of Geometrically Nonlinear Flexible Aircraft
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arXiv
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866913031963803648 |
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| author | Tantaroudas, Nikolaos D. Karachalios, Ilias |
| author_facet | Tantaroudas, Nikolaos D. Karachalios, Ilias |
| contents | H Infinity robust control synthesis for gust load alleviation of very flexible aircraft is presented. The controller is synthesised on a compact reduced-order model comprising 8 degrees of freedom for the UAV configuration and 9 for the flying-wing, obtained through nonlinear model order reduction of the coupled fluid-structure-flight dynamics system, and validated on the full nonlinear model. The control architecture employs trailing-edge flap deflection as the actuator and wing-tip displacement as the performance output, with an input-shaping weighting function Kc that governs the trade-off between structural load alleviation and rigid-body trajectory deviation. Results are presented for a Global Hawk-like UAV and a very flexible flying-wing configuration. The methodology demonstrates that H infinity controllers designed on low-order ROMs can robustly alleviate gust loads when applied to high-dimensional nonlinear aeroelastic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_17443 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | H Infinity Robust Control for Gust Load Alleviation of Geometrically Nonlinear Flexible Aircraft Tantaroudas, Nikolaos D. Karachalios, Ilias Computational Engineering, Finance, and Science H Infinity robust control synthesis for gust load alleviation of very flexible aircraft is presented. The controller is synthesised on a compact reduced-order model comprising 8 degrees of freedom for the UAV configuration and 9 for the flying-wing, obtained through nonlinear model order reduction of the coupled fluid-structure-flight dynamics system, and validated on the full nonlinear model. The control architecture employs trailing-edge flap deflection as the actuator and wing-tip displacement as the performance output, with an input-shaping weighting function Kc that governs the trade-off between structural load alleviation and rigid-body trajectory deviation. Results are presented for a Global Hawk-like UAV and a very flexible flying-wing configuration. The methodology demonstrates that H infinity controllers designed on low-order ROMs can robustly alleviate gust loads when applied to high-dimensional nonlinear aeroelastic systems. |
| title | H Infinity Robust Control for Gust Load Alleviation of Geometrically Nonlinear Flexible Aircraft |
| topic | Computational Engineering, Finance, and Science |
| url | https://arxiv.org/abs/2603.17443 |