Abstract:

A variable structural multimodel method is propose based on a duallayered grid (DLGVSMM) for state estimation of hybrid system. The total model set of DLGVSMM is composed of a basic grid. The structure of the new method can be adaptively tuned and an amendatory model grid C which can move freely in the space of system mode. Firstly, the likely model set technique is used to adjust the topology structure of the M. Then, the central position of C produced by the adaptive grid approach is further used to produce the adaptive amendatory model grid C. Finally, the total estimation can be obtained by optimal information fusion. Simulations demonstrate that the proposed DLGVSMM wiil improve the tracking performance at a limited extra computational cost. 

Key words: variable structure multimodel estimation, double layer model grid, basic grid, amendatory grid