Nonsynchronized state estimation of uncertain discrete-time piecewise affine systems

This paper investigates the problem of robust H-infinity state estimation for a class of uncertain discretetimepiecewise affine systems where state space instead of measurable output space partitions are assumed so that the filterimplementation may not be synchronized with plant state trajectory transitions. Based on a piecewise quadratic Lyapunovfunction combined with S-procedure and some matrix inequality convexifying techniques, two different approaches aredeveloped to the robust filtering design for the underlying piecewise affine systems. It is shown that the filter gains can beobtained by solving a set of linear matrix inequalities (LMIs). Finally, a simulation example is provided to illustrate theeffectiveness of the proposed approaches.