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This paper proposes a new continuous terminal sliding mode guidance law for three-dimensional missile guidance system under maneuvering target with consideration of second-order autopilot dynamics. The proposed guidance law not only guarantees the azimuth rate and elevation rate of guidance system converge to zero in finite time but also ensures the continuity of control action. Simulations of a practical...
In this paper, the drag-based trajectory tracking guidance problem is investigated for Mars entry vehicle subject to uncertainties. A composite super twisting sliding mode control method based on finite-time disturbance observer is proposed for guidance law design. The proposed controller not only eliminates the effects of matched and mismatched disturbances due to uncertainties of atmospheric models...
A continuous finite-time sliding mode control method based on finite-time disturbance observer is designed for DC-AC inverters with matched/mismatched disturbances. First of all, a finite-time disturbance observer is introduced for the estimations of disturbances and their derivatives. And then, the estimation information of disturbances and their derivatives are utilized to construct a new dynamic...
In this paper, the finite-time stabilization problem for second-order systems subject to mismatched disturbances is studied. By integrating the homogeneous control technique and the finite-time disturbance observer together, a kind of feedforward-feedback composite controllers are proposed. These controllers globally finite-time stabilize the disturbed systems. Moveover, the composite control method...
A new composite nonlinear predictive control (NPC) method based on finite-time disturbance observer is proposed for Mars entry drag trajectory tracking. The composite controller uses nonlinear predictive control strategy in a feedback regulation way to obtain desired tracking performance and uses the disturbance estimation based on finite-time disturbance observer (FTDO) to compensate uncertainty...
A continuous nonsingular terminal sliding mode control approach is proposed for mismatched disturbance attenuation. A novel nonlinear dynamic sliding mode surface is designed based on a finite-time disturbance observer. The time taken to reach the desired setpoint from any initial states under mismatched disturbance is guaranteed to be finite time. In addition, the proposed method exhibits the fine...
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