Abstract This paper is concerned with the problem of stability analysis of nonlinear Roesser-type two-dimensional (2D) systems. Firstly, the fuzzy modeling method for the usual one-dimensional (1D) systems is extended to the 2D case, then the underlying nonlinear 2D system could be represented by the 2D Takagi-Sugeno (TS) fuzzy model which is convenient to implement the stability analysis. Secondly, a new kind of fuzzy Lyapunov function which is homogeneous polynomially parameter-dependent on fuzzy membership functions is developed to conceive less conservative stability conditions for the TS Roesser-type 2D system. In the process of stability analysis, the obtained stability conditions approach to exactness in the sense of convergence by applying some novel relaxed techniques. Moreover, the obtained result is formulated in the form of linear matrix inequalities, which can be easily solved via standard numerical software. Finally, a numerical example is also given to demonstrate the effectiveness of the proposed approach.
Received: 01 April 2012
Revised: 30 May 2012
Accepted manuscript online:
PACS:
05.45.-a
(Nonlinear dynamics and chaos)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60972164, 60904101 and 61273029), the Key Project of Chinese Ministry of Education (Grant No. 212033), the Key Technologies R & D Program of Liaoning Province (Grant No. 2011224006), the Program for Liaoning Innovative Research Team in University (Grant No. LT2011019), the Program for Liaoning Excellent Talents in University (Grant No. LJQ2011137), and the Science and Technology Program of Shenyang (Grant No. F11-264-1-70).
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