This paper presents new developments in common functional observers for two systems. We improve an existing common functional observer scheme by reducing its order, and then investigate its existence conditions in terms of the original system matrices. These conditions have never been explored and they enable the users to know at the outset the class of systems for which the scheme is applicable. They also show that both observers can be designed independently of each other which significantly simplifies the design process. A numerical simulation verifies the findings.
|Journal||International Journal of Control, Automation and Systems|
|Early online date||26 Sep 2015|
|Publication status||Published - Dec 2015|
- Common observers
- functional observers
- unknown input observers