Projection-Based Adaptive Backstepping Control of a Transport Aircraft for Heavyweight Airdrop
| Autor: | Ri Liu, Xiuxia Sun, Wenhan Dong, Guangzhi Xu |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | International Journal of Aerospace Engineering, Vol 2015 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1687-5966 1687-5974 |
| DOI: | 10.1155/2015/538901 |
| Popis: | An autopilot inner loop that combines backstepping control with adaptive function approximation is developed for airdrop operations. The complex nonlinear uncertainty of the aircraft-cargo model is factorized into a known matrix and an uncertainty function, and a projection-based adaptive approach is proposed to estimate this function. Using projection in the adaptation law bounds the estimated function and guarantees the robustness of the controller against time-varying external disturbances and uncertainties. The convergence properties and robustness of the control method are proved via Lyapunov theory. Simulations are conducted under the condition that one transport aircraft performs a maximum load airdrop task at a height of 82 ft, using single row single platform mode. The results show good performance and robust operation of the controller, and the airdrop mission performance indexes are satisfied, even in the presence of ±15% uncertainty in the aerodynamic coefficients, ±0.01 rad/s pitch rate disturbance, and 20% actuators faults. |
| Databáze: | Directory of Open Access Journals |
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