一类高阶非线性时滞系统的固定时间自适应控制OA

The fixed-time adaptive control problem for a class of high-order nonlinear systems with un-known time delay is investigated.Based on the backstepping control method and appropriately constructed Lyapunov-Krasovskii(L-K)functionals,a unified fixed-time adaptive control scheme is proposed.During the controller design process,tuning functions are introduced to prevent over-parameterization.The devel-oped adaptive controller guarantees global fixed-time stability of the closed-loop system even when the time delays are unknown,while the upper bound of the settling time can be adjusted by modifying design parameters.Finally,a simulation example is provided to verify the effectiveness of the designed control strategy.