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The landing accuracy of a Mars entry vehicle will be degraded duo to uncertain factors in the atmospheric entry process and a novel composite guidance law, having a composite hierarchical framework, is presented to improve the landing accuracy in this paper. It could eliminate the constraint that maximum boundary value of uncertain factors must be known in advance in the multiple sliding surface guidance...
This paper investigates the finite-time consensus tracking problem for a group of quadrotor aircraft with a leader-follower structure. Based on finite-time algorithms, the finitetime position controller and attitude controller are designed respectively in this note. Based on homogenous system theory and Lyapunov theory, the finite-time stability of the closed-loop systems is given and it is shown...
Maneuvering aircraft tracking under low accuracy observations is a challenge. To solve this problem, we constructed the corresponding dynamic model for different flying states of aircraft. Then we combined the models of different flying states into single one. Since an accurate dynamic model is a strong constraint for the flying trajectory of aircraft, the trajectory should follow the dynamic characteristic...
Flatness approach is a straightforward method to solve the control problems of flat systems which are a class of systems whose states and control inputs can be expressed by the so-called flat outputs. Some results about flatness of systems and the advantages of studying flatness approach are presented in this paper. By using flatness approach, the controllability and other control problems for some...
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