However. the disadvantage of slidin

However. the disadvantage of sliding mode controller is that the chatter will appear. In order to overcome the short coming. we propose an adaptive prescribed performance control scheme to achieve the synchronizat ion of two Inert ain gyros systems with unknown dead-zone input To the author's best knowledge, there is few literature to research the synchronization problem for uncertain gyros system with unknown control gain and unknown dead-zone InputTo handle unknown nonlinear functions in gyro system, fuzzy logic systems will be used in this paper. For adaptive fuzzy approaches, two of the main features are (1) they can be used to deal with those nonlinear systems without satisfying the matching conditions and (ii)they do not require the unknown nonlinear functions being linearly parameterized Compared with related works. There are three main contributions that are worth emphasing.(1) Compared with the results in 10, 11), the uncertain gyros with unknown control gain is considered(2) The prescribed performance function(PPF)is incorporated into the control design(3)The controller will not show singular problem and chatter phenomenon