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A Current Local Model and Parameter Estimation Algorithm of Nonliner Timevarying Systems

LI Lizheng 1,HE Qinghua 2 (1.college of Information Science and Engineering,Central South University,Changsha,410083,China;2.College of Mechanical and Elecrtical Engineering,Cenrtal South University,Changsha,410083,China)  
Asimple and practical linear current local model is proposed for identification and prediction of nonlinear timevarying systems with unknown and immeasurable deterministic disturbance.The existing theorem of the local model and its proof are descrbbed.By augmenting a certain number of recent linear local models,a rolling multiple model weighted average estimation algorithm is presented for tracking the fast timevarying model parameters.Simulation results conform the effectiveness of the current local model and the estimation algorithm.
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