Entity

Time filter

Source Type


Yang K.,Tianjin University | Xian B.,Tianjin University | Li X.,Tianjin University | Yu Y.,Tianjin University | And 2 more authors.
Proceedings of the 29th Chinese Control Conference, CCC'10 | Year: 2010

In this paper, we proposed a nonlinear robust control design combined with neural network for a 3 degree of freedom (DOF) helicopter test-bed which may be subjected to unknown external disturbance and contains structure uncertainties. Regulation and tracking control design are proposed for the angles of elevation, pitch and travel axes. Numerical simulation results are provided to illustrate that the proposed controllers achieve good performance and the closed loop systems obtain good robustness with respect to system uncertainties and disturbances.


Huang M.,Tianjin University | Xian B.,Tianjin University | Diao C.,Tianjin University | Yang K.,Tianjin University | Feng Y.,Chinese State Nuclear Power Technology Corporation Ltd.
Proceedings of the 2010 American Control Conference, ACC 2010 | Year: 2010

This paper considers about the control problem for an underactuated quadrotor UAV system with model parameter uncertainty. Backstepping based techniques are utilized to design a nonlinear adaptive controller which can compensate for the mass uncertainty of the vehicle. Lyapunov based stability analysis shows that the proposed control design yields asymptotic tracking for the UAV's motion in x, y, z direction and the yaw rotation, while keep the stability of the closed loop dynamics of the quadrotor UAV. Numerical simulation results are provided to show the good tracking performance of proposed control laws. © 2010 AACC.


Li X.,Tianjin University | Xian B.,Tianjin University | Diao C.,Tianjin University | Yu Y.,Tianjin University | And 2 more authors.
IEEE International Symposium on Intelligent Control - Proceedings | Year: 2010

In this paper, the output feedback control problem for a genetic hypersonic vehicle is considered under the restriction that only the vehicle's velocity and altitude are measurable. High gain observers (HGO) are utilized to provide estimation signals for unmeasurable derivatives of the vehicle's velocity and altitude. A comprehensive stability analysis of the closed loop system under the output feedback control is carried to prove that the proposed control law yields semiglobal uniformly ultimately bounded tracking while keep all the closed loop signals bounded. Numerical simulation results are presented to validate the proposed control design. © 2010 IEEE.


Li D.,Tianjin University | Xian B.,Tianjin University | Li X.,Tianjin University | Diao C.,Tianjin University | And 2 more authors.
Proceedings of the 29th Chinese Control Conference, CCC'10 | Year: 2010

In this paper, a continuous nonlinear robust control design was proposed for the longitudinal dynamics of a generic hypersonic vehicle developed at NASA Langley Research Center which may be subjected to unknown external disturbance and contains structure uncertainties. Regulation and tracking control design were proposed with the throttle setting and elevator deflection as control inputs. Lyapunov based analysis proved that the proposed controller could achieve semi-global asymptotic tracking, while keep all the closed loop signals to be bounded. Numerical simulation results were provided to illustrate that the proposed controllers achieve good performance with good robustness with respect to the system's uncertainties and external disturbances.

Discover hidden collaborations