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Research on Disturbance in nearspacevehicle Longitudinal Trajectory System

Research on Disturbance in NearspaceVehicle Longitudinal Tra...

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第25届中国控制与决策会议

作者： HE Nai-bao GAO Qian GONG Cheng-long JIANG Chang-sheng School of Electrical Engineering Huaihai Institute of Techology College of Automatic Engineering Nanjing University of Aeronautics and Astronautics

ISBN: (纸本)9781467355339

Considering the severe changes of aero-dynamic parameters and susceptibility on the external disturbances of nearspace vehicle （NSV）, a backstepping control strategy with robust adaptive dynamic surface is proposed in this paper for the disturbance problem in the NSV longitudinal trajectory system during the hypersonic process. Firstly, the complex nonlinear longitudinal dynamic model is transformed into nonlinear affine model by using the input-output feedback linearization method. Meanwhile, the "computer explosion" in the computation procedures for derivatives is avoided with the estimation of the virtual control law in one-order low pass filter. Then,the robustness item in the virtual controller ,which combined with approximation capability of neural network, is used to eliminate the parameter uncertainties and external disturbances in NSV. The simulation results show the improved robustness in this method with reduced complexity.

关键词： dynamic surface control Robust Control nearspace vehicle neural network

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Application of Fuzzy Optimization Control in NSV Anti-disturbance

Application of Fuzzy Optimization Control in NSV Anti-distur...

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第26届中国控制与决策会议

作者： GAO Qian HE Nai-bao School of Computer Engineering Jiangsu University of Techology School of Electrical Engineering Jiangsu University of Techology

Variable universe fuzzy control based on intelligent control technology is proposed in this paper for the hypersonic flight process of nearspace vehicle(NSV) with severe changes of aero-dynamic parameters and susceptibility on the external disturbances. And the contraction-expansion factor of the fuzzy control is given to modify the scale of universe and reduce the computational cost. By adopting fast fuzzy terminal sliding mode with variable universe in the slow loop controller which is suffering the disturbance, its robustness, the speed of anti-disturbance and control accuracy are enhanced with the adaptively modified fuzzy universe. A demonstration with the Lyapunov function is given to proved that the errors of system could converge to zero in finite time.

关键词： Variable Universe Robust Control nearspace vehicle Fuzzy Control

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