scholarly journals Design of Nonlinear Backstepping Double-Integral Sliding Mode Controllers to Stabilize the DC-Bus Voltage for DC–DC Converters Feeding CPLs

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6753
Author(s):  
Subarto Kumar Ghosh ◽  
Tushar Kanti Roy ◽  
Md. Abu Hanif Pramanik ◽  
Md. Apel Mahmud
Keyword(s):  
Feedback Linearization ◽  
Distribution Systems ◽  
Sliding Mode ◽  
Sliding Mode Controller ◽  
Double Integral ◽  
Integral Sliding Mode ◽  
Sliding Mode Controllers ◽  
Dc Bus ◽  
Bus Voltage ◽  
Feedback Linearization Approach

This paper proposes a composite nonlinear controller combining backstepping and double-integral sliding mode controllers for DC–DC boost converter (DDBC) feeding by constant power loads (CPLs) to improve the DC-bus voltage stability under large disturbances in DC distribution systems. In this regard, an exact feedback linearization approach is first used to transform the nonlinear dynamical model into a simplified linear system with canonical form so that it becomes suitable for designing the proposed controller. Another important feature of applying the exact feedback linearization approach in this work is to utilize its capability to cancel nonlinearities appearing due to the incremental negative-impedance of CPLs and the non-minimum phase problem related to the DDBC. Second, the proposed backstepping double integral-sliding mode controller (BDI-SMC) is employed on the feedback linearized system to determine the control law. Afterwards, the Lyapunov stability theory is used to analyze the closed-loop stability of the overall system. Finally, a simulation study is conducted under various operating conditions of the system to validate the theoretical analysis of the proposed controller. The simulation results are also compared with existing sliding mode controller (ESMC) and proportional-integral (PI) control schemes to demonstrate the superiority of the proposed BDI-SMC.

Robust Nonlinear Double Integral Sliding Mode Controller Design for Mitigating SSR in DFIG-Based Wind Farms

2021 ◽  
Author(s):  
Farjana Faria ◽  
Tushar Kanti Roy ◽  
Most. Mahmuda Khatun ◽  
Tanmoy Sarkar ◽  
Tabassum Haque ◽  
...  
Keyword(s):  
Controller Design ◽  
Sliding Mode ◽  
Wind Farms ◽  
Sliding Mode Controller ◽  
Double Integral ◽  
Integral Sliding Mode

An optimized double-integral-sliding-mode-controller for a PV microgrid

2021 ◽  
Vol 40 (5) ◽  
pp. 1011-1031
Author(s):  
Swati Sucharita Pradhan ◽  
Raseswari Pradhan ◽  
Bidyadhar Subudhi
Keyword(s):  
Sliding Mode ◽  
Water Evaporation ◽  
Sliding Mode Controller ◽  
Double Integral ◽  
Reference Tracking ◽  
Content Type ◽  
Integral Sliding Mode ◽  
Highly Nonlinear ◽  
System Output ◽  
Linear Controllers

Purpose The dynamics of the PV microgrid (PVMG) system are highly nonlinear and uncertain in nature. It is encountered with parametric uncertainties and disturbances. This system cannot be controlled properly by conventional linear controllers. H− controller and sliding mode controller (SMC) may capable of controlling it with ease. Due to its inherent dynamics, SMC introduces unwanted chattering into the system output waveforms. This paper aims to propose a controller to reduce this chattering. Design/methodology/approach This paper presents redesign of the SMC by modifying its sliding surface and tuning its parameters by employing water-evaporation-optimization (WEO) based metaheuristic algorithm. Findings By using this proposed water-evaporation-optimization algorithm-double integral sliding mode controller (WEOA-DISMC), the chattering magnitude is diminished greatly. Further, to examine which controller between H8 controller and proposed WEOA-DISMC performs better in both normal and uncertain situations, a comparative analysis has been made in this paper. The considered comparison parameters are reference tracking, disturbance rejection and robust stability. Originality/value WEO tuned DISMC for PVMG system is the contribution.

scholarly journals Charging/discharging system based on zeta/sepic converter and a sliding mode controller for dc bus voltage regulation

2020 ◽  
Vol 13 (8) ◽  
pp. 1514-1527 ◽  
Author(s):  
Elkin Edilberto Henao‐Bravo ◽  
Andres Julian Saavedra‐Montes ◽  
Carlos Andres Ramos‐Paja ◽  
Juan David Bastidas‐Rodriguez ◽  
Daniel Gonzalez Montoya
Keyword(s):  
Sliding Mode ◽  
Voltage Regulation ◽  
Sliding Mode Controller ◽  
Dc Bus ◽  
Bus Voltage

scholarly journals Dynamic analysis and controller design for a slider–crank mechanism with piezoelectric actuators

2016 ◽  
Vol 3 (4) ◽  
pp. 312-321 ◽  
Author(s):  
Samin Akbari ◽  
Fatemeh Fallahi ◽  
Tohid Pirbodaghi
Keyword(s):  
Feedback Linearization ◽  
Dynamic Behaviour ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Sliding Mode Controller ◽  
Connecting Rod ◽  
Control Schemes ◽  
Feedback Linearization Approach ◽  
Crank Mechanism ◽  
Crank Length

Abstract Dynamic behaviour of a slider–crank mechanism associated with a smart flexible connecting rod is investigated. Effect of various mechanisms' parameters including crank length, flexibility of the connecting rod and the slider's mass on the dynamic behaviour is studied. Two control schemes are proposed for elastodynamic vibration suppression of the flexible connecting rod and also obtaining a constant angular velocity for the crank. The first scheme is based on feedback linearization approach and the second one is based on a sliding mode controller. The input signals are applied by an electric motor located at the crank ground joint, and two layers of piezoelectric film bonded to the top and bottom surfaces of the connecting rod. Both of the controllers successfully suppress the vibrations of the elastic linkage. Highlights Dynamic behaviour of a slider–crank mechanism associated with a smart flexible connecting rod is investigated. Effect of various mechanisms' parameters including crank length, flexibility of the connecting rod and the slider's mass on the dynamic behaviour is studied. Two control schemes are proposed for elastodynamic vibration suppression of the flexible connecting rod and also obtaining a constant angular velocity for the crank. Controllers are based on feedback linearization approach and sliding mode controller.

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