%0 Electronic Article
%A Rong Wu
%A Changzhu Wei
%A Feng Yang
%A Naigang Cui
%A Liang Zhang
%K composite robust control approach
%K small gain-based discontinuous control term
%K disturbance estimation
%K fixed-time disturbance observer
%K bi-limit-weighted homogeneous FxTDO
%K matched uncertain disturbances
%K second-order nonlinear systems
%K chattering phenomenon
%K composite control law
%K second-order uncertain systems
%K differentiation error amplification strategy
%K fast convergence rate
%K power functions
%K FxTDO-based nonsingular terminal sliding mode control
%K parameters tuning process
%X In this study, a composite robust control approach with non-singular terminal sliding mode control and fixed-time disturbance observer (FxTDO) is proposed for a class of second-order non-linear systems in the presence of matched uncertain disturbances. A bi-limit-weighted homogeneous FxTDO is designed based on the efficient utilisation of power functions obtained by the differentiation error amplification strategy. The FxTDO enjoys a fast convergence rate and simple parameters tuning process. By introducing the disturbance estimation to directly compensate the total disturbance in the composite control law, only a particular small gain-based discontinuous control term is needed to guarantee the existence of sliding mode, and chattering phenomenon can be attenuated. The simulation results revealed the effectiveness of the proposed method.
%@ 1751-8644
%T FxTDO-based non-singular terminal sliding mode control for second-order uncertain systems
%B IET Control Theory & Applications
%D December 2018
%V 12
%N 18
%P 2459-2467
%I Institution of Engineering and Technology
%U https://digital-library.theiet.org/;jsessionid=9s8w7173y588.x-iet-live-01content/journals/10.1049/iet-cta.2018.5455
%G EN