document: Observer-based strict positive real -LRB- SPR -RRB- feedback control system design Presents theory for stability analysis and design for a class of observer-based feedback control systems . Relaxation of the controllability and observability conditions imposed in the Yakubovich-Kalman-Popov lemma can be made for a class of nonlinear systems described by a linear time-invariant system with a feedback-connected cone-bounded nonlinear element . It is shown how a circle-criterion approach can be used to design an observer-based state feedback control which yields a closed-loop system with specified robustness characteristics . The approach is relevant for design with preservation of stability when a cone-bounded nonlinearity is introduced in the feedback loop . Important applications are to be found in nonlinear control with high robustness requirements
doc_bio_tags: O O O O O O O O B I I O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O