Finite-time output feedback control for a class of second-order nonlinear systems with application to DC–DC buck converters

2014 ◽  
Vol 78 (3) ◽  
pp. 2021-2030 ◽  
Author(s):  
Haibo Du ◽  
Yingying Cheng ◽  
Yigang He ◽  
Ruting Jia
2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jun Zhou ◽  
Xianqiang Li

A class of unknown nonaffine pure-feedback nonlinear systems is investigated and a novel output feedback control scheme with low complexity is proposed, based on the sliding mode control theory. The scheme is capable of guaranteeing output tracking error with finite-time convergence and bounded closed loop signals. In this scheme, a novel transformation method is included, which can easily transform the state-feedback control of nonaffine systems into output feedback control of strict-feedback affine systems. Based on the transformed affine systems, a novel finite-time sliding mode control is designed, which is continuous and nonsingular. The control scheme proposed in this work is simple and easy to implement, in which the ‘‘explosion of complexity’’ caused by backstepping-like scheme is completely avoided. And the finite-time convergence is successfully achieved. In addition, the scheme is designed based on output feedback control. And the dynamics of the nonaffine nonlinear systems is unknown in the design process. Thus, the system knowledge needed is reduced.


Author(s):  
Libin Wang ◽  
Huanqing Wang ◽  
Peter Xiaoping Liu ◽  
Song Ling ◽  
Siwen Liu

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