This paper studies output feedback control of pure-feedback systems with immeasurable states and completely non-affine property. Since availability of all the states is usually impossible in the actual process, we assume that just the system output is measurable and the system states are not available. First, to estimate the immeasurable states a state observer is designed. Relatively fewer res...

In this letter, we study the irregular output feedback linear quadratic (LQ) control problem where state is measured through a system with noise. It interesting to show that standard average LQ cost unsolvable even if solvable, which completely different from classical regular control. order guarantee solvability of control, modified at terminal time expectation in letter. framework function, i...