船舶運(yùn)動飽和控制
[Abstract]:The backstepping design method was proposed in the late 1980s and early 1990s. It is a recursive nonlinear design method for constructing feedback control rate and Lyapunov function. It is an effective method to solve the control problem of nonlinear systems. Due to the need of research, the Backstepping design method and Lyapunov stability theory are introduced in this paper. Firstly, for the input saturation limitation problem of a class of nonlinear systems, a control algorithm is proposed for the system with uncertain parameters and unknown disturbances, and the hyperbolic tangent function is used to approximate the saturation nonlinear auxiliary compensation. The stability of the system is guaranteed and good control effect is obtained. Then, for the problem of input saturation in the ship course keeping control system, this paper applies this algorithm to the ship course maintenance control system, and designs a ship course maintenance controller. The controller can make the error of ship track and set course any small and achieve the asymptotic stability of the system. The stability of the closed-loop system is guaranteed by the controller algorithm in this paper, and the course tracking error can be reduced arbitrarily. Finally, the simulation research with MATLAB is carried out to verify the validity of the controller.
【學(xué)位授予單位】:大連海事大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:U664.82
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