Abstract: This paper mainly deals with the output stability control problem of two classes of uncertain nonlinear systems. The first class of problems is solved through decoupling of uncertain inputs, via partial linearization and poles assignment. The second class is solved through obtaining a direct Lurie's subsystem via partial linearization. The methods provided in this paper can be applied to practice widely and easily.

Key words: uncertain nonlinear system, output stability, partial linearization, Lurie's system