This paper presents an adaptive constrained attitude control for uncertain spacecraft. Inspired by the concept of nonsingular terminal sliding mode and funnel nonlinear systems, a novel is introduced which contains time-varying gain to handle constraints imposed on spacecraft attitude. Indeed, when trajectory approaches boundary constraint set, effort as well will increase in order preclude fro...

Aiming at the speed regulation problem of permanent magnet synchronous motor (PMSM) drives, a novel backstepping nonsingular terminal sliding mode control (BNTSMC) method with finite-time disturbance observer (FTDO) is proposed. In order to ensure excellent tracking and anti-disturbance performance, controller based on equivalent model recursive principle designed for PMSM. The benefits this ap...

A recursive continuous higher order nonsingular terminal sliding-mode (TSM) controller is proposed in this article for nonlinear systems. new integral TSM manifold constructed a manner by modifying the tool of adding power integrator instead exploring nonrecursive design directly. super-twisting like reaching law designed to achieve control action without sacrificing disturbance rejection speci...

In this work, a tracking control strategy is developed to achieve finite-time stability of quadrotor Unmanned Aerial Vehicles (UAVs) subject external disturbances and parameter uncertainties. Firstly, extended state observer (ESO) proposed based on the nonsingular terminal sliding mode variable estimate position subsystem. Then, utilizing information provided by ESO (NTSMC) technique, dynamic s...