scholarly journals Sliding Mode Observer-Based Finite Time Control Scheme for Frequency Regulation and Economic Dispatch in Power Grids

2021 ◽  
pp. 1-8
Author(s):  
Gianmario Rinaldi ◽  
Prathyush P. Menon ◽  
Christopher Edwards ◽  
Antonella Ferrara
Keyword(s):  
Finite Time ◽  
Sliding Mode ◽  
Economic Dispatch ◽  
Sliding Mode Observer ◽  
Power Grids ◽  
Frequency Regulation ◽  
Time Control ◽  
Control Scheme

scholarly journals RBFNN-Based Singularity-Free Terminal Sliding Mode Control for Uncertain Quadrotor UAVs

2021 ◽  
Vol 2021 ◽  
pp. 1-10 ◽  
Author(s):  
Meiling Tao ◽  
Xiongxiong He ◽  
Shuzong Xie ◽  
Qiang Chen
Keyword(s):  
Finite Time ◽  
Sliding Mode ◽  
Auxiliary Function ◽  
External Disturbances ◽  
Terminal Sliding Mode ◽  
Finite Time Convergence ◽  
Time Control ◽  
Control Scheme ◽  
Unknown Disturbances ◽  
Quadrotor Unmanned Aerial Vehicles

In this article, a singularity-free terminal sliding mode (SFTSM) control scheme based on the radial basis function neural network (RBFNN) is proposed for the quadrotor unmanned aerial vehicles (QUAVs) under the presence of inertia uncertainties and external disturbances. Firstly, a singularity-free terminal sliding mode surface (SFTSMS) is constructed to achieve the finite-time convergence without any piecewise continuous function. Then, the adaptive finite-time control is designed with an auxiliary function to avoid the singularity in the error-related inverse matrix. Moreover, the RBFNN and extended state observer (ESO) are introduced to estimate the unknown disturbances, respectively, such that prior knowledge on system model uncertainties is not required for designing attitude controllers. Finally, the attitude and angular velocity errors are finite-time uniformly ultimately bounded (FTUUB), and numerical simulations illustrated the satisfactory performance of the designed control scheme.

Finite-time coordination control for networked bilateral teleoperation

Robotica ◽  
2014 ◽  
Vol 33 (2) ◽  
pp. 451-462 ◽  
Author(s):  
Yana Yang ◽  
Changchun Hua ◽  
Huafeng Ding ◽  
Xinping Guan
Keyword(s):  
Finite Time ◽  
Sliding Mode ◽  
Bilateral Teleoperation ◽  
Coordination Control ◽  
Terminal Sliding Mode ◽  
Time Control ◽  
Control Scheme

SUMMARYA continuous finite-time control scheme for networked bilateral teleoperation is proposed in this brief. The terminal sliding mode technology is used and new master–slave torques are designed. With the new controller, the coordination error of the master manipulator and the slave manipulator converges to zero in finite time. Moreover, the reaching time and the sliding time can be derived. Finally, the comparisons are performed and simulations show the effectiveness of the proposed approach.

scholarly journals Finite-Time Terminal Sliding Mode Tracking Control for Piezoelectric Actuators

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Jin Li ◽  
Liu Yang
Keyword(s):  
Finite Time ◽  
Tracking Control ◽  
Sliding Mode ◽  
Piezoelectric Actuators ◽  
Fast Response ◽  
Terminal Sliding Mode ◽  
Time Control ◽  
Sliding Mode Disturbance Observer ◽  
Control Scheme ◽  
Bounded Disturbances

This paper proposes a continuous finite-time control scheme using a new form of terminal sliding mode (TSM) combined with a sliding mode disturbance observer (SMDO). The proposed controller is applied for nanopositioning of piezoelectric actuators (PEAs). Nonlinearities, mainly hysteresis, can drastically degrade the system performance. Same as the model imperfection, hysteresis can also be treated as uncertainties of the system. These uncertainties can be addressed by terminal sliding mode control (TSMC) for it is promising for positioning and tracking control. To further improve the robustness of the TSM controller, the SMDO is employed to estimate the bounded disturbances and uncertainties. The robust stability of the TSMC is proved through a Lyapunov stability analysis. Simulation results demonstrate the effectiveness of the proposed TSM/SMDO controller for both positioning and tracking applications. The fast response, few chattering, and high precision positioning and tracking performances can be achieved in finite time by the proposed controller.

scholarly journals Finite-time control for uncertain systems and application to flight control

2020 ◽  
Vol 25 (2) ◽  
Author(s):  
Fang Wang ◽  
Jianmei Wang ◽  
Kun Wang ◽  
Changchun Hua ◽  
Qun Zong
Keyword(s):  
Flight Control ◽  
Finite Time ◽  
Sliding Mode ◽  
Lyapunov Stability Theory ◽  
Fixed Time ◽  
Closed Loop System ◽  
Finite Time Stability ◽  
Time Control ◽  
Control Scheme ◽  
Mismatched Uncertainty

In this paper, the finite-time control design problem for a class of nonlinear systems with matched and mismatched uncertainty is addressed. The finite-time control scheme is designed by integrating multi power reaching (MPR) law and finite-time disturbance observer (FTDO) into integral sliding mode control, where a novel sliding surface is designed, and the FTDO is applied to estimate the uncertainty. Then the fixed-time reachability of the MPR law is analyzed, and the finite-time stability of the closed-loop system is proven in the framework of Lyapunov stability theory. Finally, numerical simulation and the application to the flight control of hypersonic vehicle (HSV) are provided to show the effectiveness of the designed controller.

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