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| DOI： |
| Received:December 22, 2005Revised:March 29, 2005 |
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| Robust H-infinity filtering on uncertain systems under sampled measurements |
| Ping SUN, Yuanwei JING |
| (School of Information Science and Engineering, Northeastern University, Shenyang Liaoning 110004, China) |
| Abstract: |
| This paper is concerned with the problem of robust H-infinity filtering on uncertain systems under sampled measurements, both continuous disturbance and discrete disturbance are considered in the systems. The parameter uncer- tainty is assumed to be time-varying norm-bounded. The aim is to design an asymptotically stable filter, using the locally sampled measurements, which ensures both the robust asymptotic stability and a prescribed level of H-infinity performance for the filtering error dynamics for all admissible uncertainties. The derivation process is simplified by introducing auxiliary systems and the sufficient condition for the existence of such a filter is proposed. During the study, the main results were expressed as LMIs by employing various matrix techniques. Using LMI toolbox of Matlab software, it is very convenient to obtain the appropriate filter. Finally, a numerical example shows that the method is effective and feasible. |
| Key words: Uncertain system Auxiliary systems Sampled measurements Robust H-infinity filtering Linear matrix inequality |
