Adaptive temperature controller for plastic extrusion process

In this paper, an adaptive temperature controller for the plastic extrusion process is designed. The proposed controller aims to solve the set-point regulation problem and the temperature trajectory tracking of a plastic extrusion process. The controller is an adaptive version of the First Sliding Mode Control which is robust towards parametric uncertainties and external disturbances. Also, the finite time convergence is demonstrated by Lyapunov arguments. Finally, the effectiveness of the proposed controller under several scenarios is demonstrated by computer simulations.

Download Full-text

Adaptive sliding‐mode control for Mars entry trajectory tracking with finite‐time convergence

International Journal of Robust and Nonlinear Control ◽

10.1002/rnc.4433 ◽

2018 ◽

Vol 29 (5) ◽

pp. 1249-1264 ◽

Cited By ~ 6

Author(s):

Ganghui Shen ◽

Yuanqing Xia ◽

Dailiang Ma ◽

Jinhui Zhang

Keyword(s):

Sliding Mode Control ◽

Trajectory Tracking ◽

Finite Time ◽

Sliding Mode ◽

Adaptive Sliding Mode Control ◽

Adaptive Sliding Mode ◽

Finite Time Convergence ◽

Mode Control

Download Full-text

Robust finite-time trajectory tracking control for a space manipulator with parametric uncertainties and external disturbances

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/09544100211014754 ◽

2021 ◽

pp. 095441002110147

Author(s):

Qijia Yao

Keyword(s):

Trajectory Tracking ◽

Finite Time ◽

Tracking Control ◽

Disturbance Observer ◽

Control Method ◽

Parametric Uncertainties ◽

External Disturbances ◽

Trajectory Tracking Control ◽

Space Manipulator ◽

Tracking Controller

Space manipulator is considered as one of the most promising technologies for future space activities owing to its important role in various on-orbit serving missions. In this study, a robust finite-time tracking control method is proposed for the rapid and accurate trajectory tracking control of an attitude-controlled free-flying space manipulator in the presence of parametric uncertainties and external disturbances. First, a baseline finite-time tracking controller is designed to track the desired position of the space manipulator based on the homogeneous method. Then, a finite-time disturbance observer is designed to accurately estimate the lumped uncertainties. Finally, a robust finite-time tracking controller is developed by integrating the baseline finite-time tracking controller with the finite-time disturbance observer. Rigorous theoretical analysis for the global finite-time stability of the whole closed-loop system is provided. The proposed robust finite-time tracking controller has a relatively simple structure and can guarantee the position and velocity tracking errors converge to zero in finite time even subject to lumped uncertainties. To the best of the authors’ knowledge, there are really limited existing controllers can achieve such excellent performance under the same conditions. Numerical simulations illustrate the effectiveness and superiority of the proposed control method.

Download Full-text

A New Control Method for Second-Order Multiple Models Control System Based on Global Sliding Mode

Mathematical Problems in Engineering ◽

10.1155/2018/5709162 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Dan-xu Zhang ◽

Yang-wang Fang ◽

Peng-fei Yang ◽

You-li Wu ◽

Tong-xin Liu

Keyword(s):

Control System ◽

Sliding Mode Control ◽

Finite Time ◽

Sliding Mode ◽

Second Order ◽

Multiple Models ◽

Finite Time Convergence ◽

Mode Control ◽

Global Sliding Mode Control ◽

Control Scheme

This paper proposed a finite time convergence global sliding mode control scheme for the second-order multiple models control system. Firstly, the global sliding surface without reaching law for a single model control system is designed and the tracking error finite time convergence and global stability are proved. Secondly, we generalize the above scheme to the second-order multimodel control system and obtain the global sliding mode control law. Then, the convergent and stable performances of the closed-loop control system with multimodel controllers are proved. Finally, a simulation example shows that the proposed control scheme is more effective and useful compared with the traditional sliding mode control scheme.

Download Full-text