Multi-rate Sampled-data Observer Design for Nonlinear Systems with Asynchronous and Delayed Measurements Conference Paper uri icon


  • © 2019 American Automatic Control Council. In our previous work, we developed a multi-rate sampled-data observer design method in nonlinear systems with asynchronous sampling. In this article, possible measurement delays are accounted for in the multi-rate observer design. The proposed observer adopts an available multi-rate design in the time interval between two consecutive delayed measurements. A dead time compensation approach is developed to compensate for the effect of delay and update past estimates when a delayed measurement arrives. It is shown that stability of the multi-rate observer is preserved under nonconstant, arbitrarily large delays, in the absence of measurement errors. The proposed multirate multi-delay observer is applied to a gas-phase polyethylene reactor example and provides reliable estimates in the presence of nonuniform sampling and nonconstant delays.

author list (cited authors)

  • Ling, C., & Kravaris, C.

publication date

  • January 1, 2019 11:11 AM