Author:
Wu Guanghui,Meng Xiuyun,Wang Jie
Abstract
This paper presents a robust adaptive nonlinear dynamic inversion control approach for the longitudinal dynamics of an air-breathing hypersonic vehicle. The proposed approach adopts a fast adaptation law using high-gain learning rate, while a low-pass filter is synthesized with the modified adaptive scheme to filter out the high-frequency content of the estimates. This modified high-gain adaptive scheme achieves a good transient process and a nice robust property with respect to parameter uncertainties, without exciting high-frequency oscillations. Based on input-output linearization, the nonlinear hypersonic dynamics are transformed into equivalent linear systems. Therefore, the pole placement technique is applied to design the baseline nonlinear dynamic inversion controller. Finally, the simulation results of the modified adaptive nonlinear dynamic inversion control law demonstrate the proposed control approach provides robust tracking of reference trajectories.
Reference15 articles.
1. Shaughnessy J.D., Pinckney S.Z., McMinn J.D., Cruz C.I., Kelley M.-L., Hypersonic vehicle simulation model: winged-cone configuration, 1990.
2. Bahm C., Baumann E., Martin J., Bose D., Beck R., Strovers B., The X-43A Hyper-X Mach 7 Flight 2 Guidance, Navigation, and Control Overview and Flight Test Results, AIAA/CIRA 13th International Space Planes and Hypersonics Systems and Technologies Conference, American Institute of Aeronautics and Astronautics, 2005.
3. Smart M.K., Hass N.E., Paull A., Flight Data Analysis of the HyShot 2 Scramjet Flight Experiment, AIAA Journal, 44 (2006) 2366-2375.
4. Nonlinear Longitudinal Dynamical Model of an Air-Breathing Hypersonic Vehicle
5. Robust Nonlinear Control of a Hypersonic Aircraft