The Non-smooth Finite Time Control For Aircraft Attitude

In recent years, with the development of space technology, various flight vehicles appear constantly and the control demand is higher and higher.The paper plans to adopt a non-smooth control method which is ranged from smooth and non-continuous algorithm. The non-smooth methods not only make the system states response smoothly but also reflect faster convergence property and better robustness. Firstly, the development of the aircraft attitude and the non-smooth methods including low order and high order finite time control systems are summarized simply in the paper. To describe the procedure of the non-smooth finite time control method on cascading system, the finite-time controller is designed on a simple nonlinear system. Then a finite time control method is employed to stabilize non-smoothly on the non-linear helicopter model and micro quadrotor. The simulation shows effectiveness and performs faster convergence and better robustness. In light of some deficiencies exist in the paper, the improvements and the perspective are declared at the end of the paper. Compared to other model control methods, there are three advantages in this paper: Firstly, the system states can converge to zero in finite time; Secondly this method performs faster convergence and better robustness; Finally, the cascading system control strategy can be adopted to control by reducing some high order system to low order system.