Design of a common observer for two linear systems with unknown inputs
Trinh, Hieu and Fernando, T. 2006, Design of a common observer for two linear systems with unknown inputs, in TENCON 2006 : 2006 IEEE Region 10 Conference : Hong Kong, China, 14-17 November 2006., IEEE Xplore, Piscataway, N.J., pp. 1-3.
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TENCON 2006 : 2006 IEEE Region 10 Conference : Hong Kong, China, 14-17 November 2006.
IEEE Region 10 Conference
Place of publication
This paper considers the design of a common linear functional observer for two linear time-invariant systems with unknown inputs. A structure for a common observer which only uses the available output information is proposed. Here, for the proposed structure, we show that the simultaneous functional observation problem of two plants is reduced to a problem of designing two observers: the first is a full-order unknown input observer of one of the two systems; the second observer is a common unknown input observer of a system comprises two-connected systems. In general, the existence conditions for the second observer are very difficult to satisfy. This paper thus concludes that it is indeed very difficult to find a common observer for two linear systems with unknown inputs.
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