Barrier Function Based Adaptive Sliding Mode Controller for a Hybrid AC/DC Microgrid Involving Multiple Renewables

Armghan, Ammar; Hassan, Mudasser; Armghan, Hammad; Yang, Ming; Alenezi, Fayadh; Azeem, Muhammad Kashif; Kamran, Ali

doi:10.3390/app11188672

Cited by 14 publications

(12 citation statements)

References 47 publications

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“…For both possible FOSMC gains designs, the following theorem holds: 𝑘 𝐵 (𝑠(𝑡)) = 𝑘 𝑃𝐵𝐹 (𝑠(𝑡)) and 𝑘 𝐵 (𝑠(𝑡)) = 𝑘 𝑃𝑆𝐵𝐹 (𝑠(𝑡)) are the same things [26], [27]. Theorem.…”

Section: Adaptive First-order Smc (Fosmc) With Barrier Functionmentioning

confidence: 98%

A novel multiple access communication protocol for LoRa networks without LoraWAN

Rakan¹,

Subhi²,

Mhmood³

2023

IJEECS

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Exoskeletons and wearable robots are mechatronic devices that are worn by an operator and fit closely to the body to improve daily activities. The adaptive sliding mode control (ASMC) based on the barrier function is proposed in this study to regulate the movement of the knee joint exoskeleton with friction. This controller is implemented without the requirement to know the system model uncertainty and disturbance bounded and does not require the use of the low pass for chattering elimination with keeping the controller’s performance. The suggested barrier method can be guaranteed the output variable’s convergence and keep it in a preset neighborhood of zero regardless of the disturbance’s upper bound, without overestimating the control gain. The simulation results show that the proposed performs well, the system angle following the target angular position with a modest pre-adjusted steady-state error. Furthermore, when compared to a typically strong and stable ASMC developed with the identical actuator; the obtained results reveal superior features. Concluded from the above this control method indicates the robustness of the proposed adaptive controller with barrier function against uncertainties and disturbances elimination.

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Section: Adaptive First-order Smc (Fosmc) With Barrier Functionmentioning

confidence: 98%

A novel multiple access communication protocol for LoRa networks without LoraWAN

Rakan¹,

Subhi²,

Mhmood³

2023

IJEECS

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“…Furthermore, barrier function-based adaptive SMC may be employed to address both of the aforementioned concerns. In this study, two ways to define barrier functions are assumed [6,9].…”

Section: Figure 1 2-link Robot Armmentioning

confidence: 99%

A 2-Link Robot with Adaptive Sliding Mode Controlled by Barrier Function

Hameed,

Hamoudi

2023

JESA

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This paper focuses on designing several controllers to attenuate the chattering problem: a conventional sliding mode controller (CSMC) with a barrier function (BF) and a saturation function (SF), and an adaptive sliding mode controller (ASMC) with SF as well as ASMC with BF. The key distinction between CSMC and ASMC lies in the fact that ASMC doesn't require knowledge of the upper bounds of uncertainties and the determination of gain. ASMC can minimize the magnitude of control signals to an acceptably low level. Despite perturbations such as parameter uncertainty (PU), external disruption (ED), and the friction coefficient of Coulomb (CF), both CSMC and ASMC can effectively handle the 2-link robot. They stabilize the robot manipulator and achieve the required joint position. Due to the ASMC's lower controller gain compared to CSMC, the amplitude of the chatter (zigzag motion) has been minimized. Simulation results using MATLAB 2018a/Simulink demonstrate that the ASMC outperforms the CSMC in achieving more favorable outcomes.

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“…An AC microgrid is a small-scale power system operating on alternating current (AC), which can function autonomously or in conjunction with an existing utility power grid. Both AC and DC microgrids provide distinct benefits and drawbacks, making it essential to consider the specific application and local conditions when selecting between them [4].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Interactions between Parallel Grid-Forming Inverters in a Microgrid

Almutairi

2023

Applied Sciences

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The potential instability issues caused by the dynamic interactions between parallel grid-forming inverters are examined. The approach adopted for analysis is s-domain admittance-based eigenvalue and mode shape analysis. This admittance is based on a five-node circuit diagram after the conversion of each electric circuit element and inverter control unit into impedance models. Eigenvalue analysis results show that unstable resonance modes may exist due to the interactions of two parallel inverters. Impacts of transmission line length, the converter control’s virtual impedance unit, and the voltage feed-forward unit are examined via the eigenvalue and mode shape analysis. The results show that the virtual impedance control has a negligible influence on the resonance while the voltage feed-forward unit stabilizes the resonance. Finally, the stability analysis is validated using electromagnetic transient (EMT) simulations.

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Barrier Function Based Adaptive Sliding Mode Controller for a Hybrid AC/DC Microgrid Involving Multiple Renewables

Cited by 14 publications

References 47 publications

A novel multiple access communication protocol for LoRa networks without LoraWAN

A novel multiple access communication protocol for LoRa networks without LoraWAN

A 2-Link Robot with Adaptive Sliding Mode Controlled by Barrier Function

Dynamic Interactions between Parallel Grid-Forming Inverters in a Microgrid

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