Delayed unknown input observers for discrete-time linear systems with guaranteed performance

• Published in: Systems & control letters Vol. 103; pp. 9 - 15
• Main Authors: Chakrabarty, Ankush, Ayoub, Raid, Żak, Stanisław H., Sundaram, Shreyas
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2017
• Subjects: [formula omitted] observer; Attack detection; Delayed estimation; Linear matrix inequalities; Unknown input observer; ℓ∞ observer; Unknown input observer; Linear matrix inequalities; Attack detection; Delayed estimation

In this paper, we propose a state and unknown input observer for discrete-time linear systems with bounded unknown inputs and measurement disturbances. The design procedure is formulated using a set of linear matrix inequalities, and leverages delayed (or fixed-lag) estimates. The observer error sta...