The characteristics of a folding-wing aerial vehicle undergo fairly great changes during its launching time. To fulfill the high robustness requirements of a flight control system, an adaptive robust nonlinear flight controller based on block backstepping is designed. A variable dynamic model is established, and the unknown uncertainty and disturbance caused by aerodynamic characteristic changes are adaptively approximated by radial basis function (RBF) neural networks. Dynamic surface control is employed to replace the differentiations of the virtual control law in traditional backstepping to overcome the problem of "term explosion". The closed-loop system is guaranteed to be bounded and the tracking errors are also proved to converge exponentially to a small neighborhood around zero by the Lyapunov approach. Furthermore,the effectiveness and robustness of the designed flight controller are verified by six degree-of-freedom (DOF) nonlinear flight simulations for the folding-wing aerial vehicle with unknown uncertainty.
CAO Lijia, ZHANG Shengxiu, LI Xiaofeng, LIU Yinan
. Robust Nonlinear Control System Design for Folding-wing Aerial Vehicles During Launching Time[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(10)
: 1879
-1887
.
DOI: CNKI:11-1929/V.20110526.1757.022
[1] 姜智超, 吴森堂, 金宪哲. 折叠翼飞行器鲁棒飞行控制系统设计方法[J]. 控制与决策, 2008, 23(7): 833-836. Jiang Zhichao, Wu Sentang, Jin Xianzhe. Design of robust flight control systems for a flex-wing vehicle[J]. Control and Decision, 2008, 23(7): 833-836. (in Chinese)
[2] Lane S H, Stengel R F. Flight control design using non-linear inverse dynamics[J]. Automatica, 1988, 24(4): 471-483.
[3] Kristic M, Kanellakopoulos I, Kokotovic P. Nonlinear and adaptive control design[M]. New York: John Wiley & Sons, 1995.
[4] Sharma M, Richards N D. Adaptive integrated guidance and control for missile interceptors. AIAA-2004-4880, 2004.
[5] Polycarpou M, Farrell J, Sharma M. On-line approximation control of uncertain nonlinear systems: issues with control input saturation. ADA436259, 2005.
[6] Farrell J, Polycarpou M, Sharma M. Adaptive backstepping with magnitude, rate, and bandwidth constraints: aircraft longitude control. ADA442139, 2006.
[7] Sonneveldt L, Chu Q P, Mulder J A, et al. Constrained adaptive backstepping flight control: application to a nonlinear F-16/MATV model. AIAA-2006-6413, 2006.
[8] 朱铁夫, 李明, 邓建华. 基于Backstepping控制理论的非线性飞控系统和超机动研究[J]. 航空学报, 2005, 26(4): 430-433. Zhu Tiefu, Li Ming, Deng Jianhua. Nonlinear flight control system based on backstepping theory and supermaneuver[J]. Acta Aeronautica et Astronautica Sinica, 2005, 26(4): 430-433. (in Chinese)
[9] Harkegard O, Glad T. Vector backstepping design for flight control. AIAA-2007-6421, 2007.
[10] Robinson J W C. Block backstepping for nonlinear flight control law design[J]. Lecture Notes in Control and Information Sciences, 2007, 365(1): 231-257.
[11] Thunberg J, Robinson J W C. Block backstepping, NDI and related cascade designs for efficient development of nonlinear flight control laws. AIAA-2008-6960, 2008.
[12] Farrell J, Sharma M, Polycarpou M. Backstepping-based flight control with adaptive function approximation[J]. Journal of Guidance, Control, and Dynamics, 2005, 28(6): 1089-1102.
[13] Ren W, Atkins E. Nonlinear trajectory tracking for fixed wing UAVs via backstepping and parameter adaptation . AIAA-2005-6196, 2005.
[14] Lee T, Kim Y. Nonlinear adaptive flight control using backstepping and neural networks controller[J]. Journal of Guidance, Control, and Dynamics, 2001, 24(4): 675-682.
[15] Niu Y, Lam J, Wang X, et al. Adaptive H∞ control using backstepping design and neural networks[J]. Journal of Dynamic Systems, Measurement, and Control, 2005, 127(3): 478-485.
[16] Stevens B L, Lewis F L. Aircraft control and simulation[M]. 2nd ed. New York: John Wiley & Sons, 2003.
[17] Das A. Nonlinear design of 3-axes autopilot for short range skid-to-turn surface-to-surface homing missiles. Kharagpur: Indian Institute of Technology, 2006.
[18] Li C Y, Jing W X, Gao C S. Adaptive backstepping-based flight control system using integral filters[J]. Aerospace Science and Technology, 2009, 13(2-3): 105-113.
[19] Li Y, Qiang S, Zhuang X, et al. Robust and adaptive backstepping control for nonlinear systems using RBF neural networks[J]. IEEE Transactions on Neural Networks, 2004, 15(3): 693-701.
[20] 周丽, 姜长生. 改进的非线性鲁棒自适应动态面控制[J]. 控制与决策, 2008, 23(8): 938-943. Zhou Li, Jiang Changsheng. Improved robust and adaptive dynamic surface control for nonlinear systems[J]. Control and Decision, 2008, 23(8): 938-943. (in Chinese)
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