Robust control of refrigeration system based on disturbance observer

2019 ◽  
Vol 569 ◽  
pp. 042012
Author(s):  
Yujia Shang ◽  
Xiaojing Liu ◽  
Tielin Lu
Keyword(s):  
Robust Control ◽  
Disturbance Observer ◽  
Refrigeration System

scholarly journals Sliding Mode Robust Control of a Wire-Driven Parallel Robot Based on HJI Theory and a Disturbance Observer

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 215235-215245
Author(s):  
Yuqi Wang ◽  
Qi Lin ◽  
Jiacai Huang ◽  
Lei Zhou ◽  
Jinjiang Cao ◽  
...  
Keyword(s):  
Robust Control ◽  
Disturbance Observer ◽  
Sliding Mode ◽  
Parallel Robot

Integral terminal sliding-mode robust vibration control of large space intelligent truss structures using a disturbance observer

2021 ◽  
pp. 095441002110290
Author(s):  
Dalong Tian ◽  
Jianguo Guo
Keyword(s):  
Robust Control ◽  
Forced Vibration ◽  
Disturbance Observer ◽  
Sliding Mode ◽  
External Disturbance ◽  
Truss Structures ◽  
Model Parameters ◽  
Large Space ◽  
Terminal Sliding Mode ◽  
Piezoelectric Stack Actuator

This study aims to develop an advanced integral terminal sliding-mode robust control method using a disturbance observer (DO) to suppress the forced vibration of a large space intelligent truss structure (LSITS). First, the dynamics of the electromechanical coupling of the piezoelectric stack actuator and the LSITS, based on finite element and Lagrangian methods, are established. Subsequently, to constrict the vibration of the structure, a novel integral terminal sliding-mode control (ITSMC) law for the DO is used to estimate the parameter perturbation of the LSITS based on a continuous external disturbance. Simulation results show that, under a forced vibration and compared with the ITSMC system without a DO, the displacement amplitude of the ITSMC system with the DO is effectively reduced. In the case where the model parameters of the LSITS deviate by ±50%, and an unknown continuous external disturbance exists, the control system with the DO can adequately attenuate the structural vibration and realize robust control. Concurrently, the voltage of the employed piezoelectric stack actuator is reduced, and voltage jitter is alleviated.

Robust Control of Commercial Vehicle’s Speed Using Disturbance Observer

2021 ◽  
Author(s):  
Kyungjoo Bang ◽  
Seunghyun Kim ◽  
Donghyuk KIM ◽  
Ilhwan KIM
Keyword(s):  
Robust Control ◽  
Disturbance Observer

Modeling of Aerodynamic Database and Robust Control Using Disturbance Observer for Quadcopter

2018 ◽  
Vol 24 (6) ◽  
pp. 519-531 ◽  
Author(s):  
Hoijo Jeaong ◽  
Seunghwan Jo ◽  
Jinyoung Suk ◽  
Seungkeun Kim ◽  
Yung-Gyo Lee ◽  
...  
Keyword(s):  
Robust Control ◽  
Disturbance Observer ◽  
Aerodynamic Database

Application of Robust Control Law for Linear Slider

2008 ◽  
Vol 2 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Satoshi Yamamoto ◽  
◽  
Shinji Wakui
Keyword(s):  
Robust Control ◽  
Disturbance Observer ◽  
High Speed ◽  
Control Law ◽  
Model Matching ◽  
Positioning Accuracy ◽  
Control Laws ◽  
Modified Model ◽  
Applied Model ◽  
Model Following

The most important specifications in precision positioning are positioning accuracy and settling time. When a positioning sensor based on required specifications is installed in equipment, every effort is made to realize throughput, i.e., high-speed positioning. We applied model-matching 2-degree-of-freedom (DOF) control to a linear slider to realize positioning, but found that positioning waveforms were uneven under different conditions. To overcome this problem, we applied robust control laws, e.g., MM-2DOF with a disturbance observer, robust 2DOF control, and modelfollowing 2DOF control to the linear slider. A comparative study confirmed experimentally that robust 2DOF control was most suitable. To improve modelfollowing 2DOF control, we modified model-following 2DOF control and its robust positioning.

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