A continuous nonsingular fast terminal sliding mode (CNFTSM) control strategy with an automated double power reaching law is proposed to improve the performance of speed dynamic response and accuracy tracking for permanent magnet synchronous motor (PMSM) servo system. In pursuit robustness against system uncertainties, a finite-time convergent extended state observer (ESO) designed estimate ext...

In this study, with the help of a disturbance observer, an adaptive fractional-order sliding mode control scheme is designed to achieve trajectory tracking indeterminate manipulators. Firstly, non-singular fast terminal (FO-NFTSM) surface presented increase convergence velocity controller. Secondly, reaching law on strength super-twisting algorithm ensure performance approaching stage. Meanwhil...

The aerial manipulator is a novel flying robot consisting of an unmanned vehicle (UAV) and multi-degree-of-freedom (DoF) robotic arm. It can actively interact with the environment to conduct dangerous or inaccessible tasks for humans. In this paper, we propose composite control scheme considering force position operate in steady contact when influenced by external disturbances. First, method wi...

This study proposes a way of designing reliable voltage controller for buck DC/DC converter in which the terminal attractor approach is combined with an enhanced reaching law-based Fast Terminal Synergetic Controller (FTSC). The proposed scheme will overcome chattering phenomena constraint existing Sliding Mode Controllers (SMCs) and issue related to indefinite time convergence traditional (SCs...

In this article, the issue of attitude control and active vibration suppression of a nonlinear flexible spacecraft is assessed through piezoelectric patches as actuator and sensors. Two controller loops are applied: the inner loop, to make the panel vibration damped through piezoelectric patches; and the outer loop, to perform spacecraft maneuver using the reaction wheel acting on the hub. An o...

Chattering is undesirable phenomenon when dealing with sliding mode control. This paper proposed a new method for addressing chattering with a simple and easy implementation in Digital Signal Processor (DSP). This is realized by replacing the discontinuous function in conventional sliding mode control with statedependent auto-tuning of boundary layer in fast sigmoid function and state-dependent...

This paper features the mathematical modeling of a single input single output based Timoshenko smart beam. Further, this mathematical model is used to design a multirate output feedback based discrete sliding mode controller using Bartoszewicz law to suppress the flexural vibrations. The first 2 dominant vibratory modes is retained. Here, an application of the discrete sliding mode control in s...