In this article, we study feedback linearization problems for nonlinear differential-algebraic control systems (DACSs). We consider two kinds of equivalences, namely, external equivalence, which is defined (locally) on the whole generalized state space, and internal locally maximal controlled invariant submanifold (i.e., set where solutions exist). define a notion called explicitation with driv...

The work deals finite frequency H<sub>∞</sub> control design for continuous time nonlinear systems, we provide sufficient conditions, ensuring that the closed-loop model is stable. Simulations will be gifted to show level of attenuation a lower can by our method obtained developed where further comparison.