Robust Control Scheme for a Microgrid With PFC Capacitor Connected

2007 ◽  
Vol 43 (5) ◽  
pp. 1172-1182 ◽  
Author(s):  
Yun Wei Li ◽  
D. Mahinda Vilathgamuwa ◽  
Poh Chiang Loh
Keyword(s):  
Robust Control ◽  
Control Scheme

A computationally efficient adaptive robust control scheme for a quad-rotor transporting cable-suspended payloads

2021 ◽  
pp. 095441002110136
Author(s):  
Nasim Ullah ◽  
Irfan Sami ◽  
Wang Shaoping ◽  
Hamid Mukhtar ◽  
Xingjian Wang ◽  
...  
Keyword(s):  
Robust Control ◽  
Fractional Order ◽  
Sliding Mode ◽  
Adaptive Robust Control ◽  
Computationally Efficient ◽  
Control Scheme ◽  
Control Schemes ◽  
Adaptive Laws ◽  
Unknown Disturbances ◽  
The Stability

This article proposes a computationally efficient adaptive robust control scheme for a quad-rotor with cable-suspended payloads. Motion of payload introduces unknown disturbances that affect the performance of the quad-rotor controlled with conventional schemes, thus novel adaptive robust controllers with both integer- and fractional-order dynamics are proposed for the trajectory tracking of quad-rotor with cable-suspended payload. The disturbances acting on quad-rotor due to the payload motion are estimated by utilizing adaptive laws derived from integer- and fractional-order Lyapunov functions. The stability of the proposed control systems is guaranteed using integer- and fractional-order Lyapunov theorems. Overall, three variants of the control schemes, namely adaptive fractional-order sliding mode (AFSMC), adaptive sliding mode (ASMC), and classical Sliding mode controllers (SMC)s) are tested using processor in the loop experiments, and based on the two performance indicators, namely robustness and computational resource utilization, the best control scheme is evaluated. From the results presented, it is verified that ASMC scheme exhibits comparable robustness as of SMC and AFSMC, while it utilizes less sources as compared to AFSMC.

A robust control scheme to improve the stability of anaerobic digestion processes

2010 ◽  
Vol 20 (4) ◽  
pp. 375-383 ◽  
Author(s):  
H.O. Méndez-Acosta ◽  
B. Palacios-Ruiz ◽  
V. Alcaraz-González ◽  
V. González-Álvarez ◽  
J.P. García-Sandoval
Keyword(s):  
Anaerobic Digestion ◽  
Robust Control ◽  
Control Scheme ◽  
The Stability

scholarly journals Multitechnique Concise Robust Control for the Insulation Containment Space Pressure Control of LNG Carrier

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zuojing Su ◽  
Xianku Zhang ◽  
Xu Han
Keyword(s):  
Time Delay ◽  
Robust Control ◽  
Energy Saving ◽  
Pressure Control ◽  
Smith Predictor ◽  
Mapping Technique ◽  
Delay Model ◽  
Nonlinear Feedback ◽  
Maintenance System ◽  
Control Scheme

In this note, a novel multitechnique concise robust control scheme, based on the mirror mapping technique (MMT), closed-loop gain shaping algorithm (CGSA), Smith predictor (SP), and nonlinear feedback technique (NFT), is proposed for the pressure control of the liquefied natural gas (LNG) carrier insulation containment space. Firstly, a kind of integral unstable time-delay model is obtained by linearizing the nonlinear model of the pressure maintenance system around its equilibrium. By using the MMT and CGSA, one acquires the corresponding stable mirror mapping model of the unstable linear model and the designed controller. And the SP is introduced to tackle the time-delay problem. In addition, for the purpose of energy saving, the NFT is added into the control scheme. Finally, a set of experiments has been employed to illustrate the control effects, and the results show that it can achieve satisfying performance in aspects of disturbance rejection and energy saving.

A Robust Control Scheme for Medium-Voltage-Level DVR Implementation

2007 ◽  
Vol 54 (4) ◽  
pp. 2249-2261 ◽  
Author(s):  
Yun Wei Li ◽  
D. Mahinda Vilathgamuwa ◽  
F. Blaabjerg ◽  
Poh Chiang Loh
Keyword(s):  
Robust Control ◽  
Voltage Level ◽  
Medium Voltage ◽  
Control Scheme
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