Ton Duc Do

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Verified

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• PhD in Electrical Engineering
• Professor (Associate) at Nazarbayev University

Scanning trajectories are essential and important components of trajectory-based scanning and imaging systems such as laser scanning confocal microscopes, atomic force microscopes (AFM), laser scanning systems for aerial surveying (LiDAR), micro-electromechanical systems (MEMS), medical imaging and 2D/3D printing. Previous study has demonstrated th...

Wind speed variables play an important role in exploiting wind power. However, they are fluctuating and random. Therefore, understanding their characteristics and properties is necessary to improve exploitation efficiency. This research investigates various wind speed distribution models, both parametric and nonparametric, to estimate wind speed pr...

Effective control of the generator’s shaft speed will ensure maximum power is captured from the wind turbines. However, the parameters of the wind energy conversion system (WECS)-based generators, including stator resistance and inductance, could change over time due to power loss, winding degradation, or core saturation. These parametric uncertain...

This paper introduces a novel sliding mode control (SMC) design utilizing a Proportional-Integral-Derivative (PID) Sliding Surface (SS) for frequency regulation in multi-area electrical power systems (EPSs) with hydropower turbines, accounting for random load conditions, parameter variations, and matched uncertainties. The global system stability o...

This chapter presents an improved pulse-amplitude modulation (PAM) method based on fuzzy control for an interior permanent magnet synchronous motor (IPMSM) drive system excited by the silicon carbide (SiC) power inverter under load condition. In detail, an automatic scheme with a 12-step switching pattern is developed for real-time seeking the opti...

This research article aims to compare the performance of three distinct types of controllers, namely proportional-integral-derivative (PID), Fuzzy PID (F-PID), and Fuzzy PID controller with prefilter (PF-PID), for the “Quanser” QDrone. In quadrotor applications, control design and implementation are of significant significance. There have been seve...

This article analyzes and assesses the potential for wind energy exploitation in six regions of Vietnam. The wind speed data are used to construct wind speed probability distributions (WSPDs) based on kernel density estimation (KDE). The KDE distribution, with six bandwidth selection methods, is implemented to generate probability density functions...

At high pulse-width modulation (PWM) carrier frequencies up to 200 kHz using silicon carbide (SiC) devices, the individual and mutual impacts of the sample time and dead-time on the SiC inverter loss in a motor drive system may become significantly. Thus, these issues under load condition are experimentally investigated and analyzed in the present...

Control techniques for Permanent Magnet Synchronous Motor (PMSM) drives rely significantly on digital systems and control system discretization is essential for stability and robustness. While continuous-time analyses are widely employed for stability analysis, generally, they fall short of describing phenomena such as the waterbed effect and under...

This paper proposes the use of a deep reinforcement learning method – and precisely a variant of the deep deterministic policy gradient (DDPG) method known as twin delayed DDPG, or TD3 – for maximum power point tracking in wind energy conversion systems that use permanent magnet synchronous generators (PMSGs). An overview of the TD3 algorithm is pr...

In this study, the integral linear quadratic regulator (LQR) with servomechanism for machine-side power converter in PMSG-based variable-speed wind energy conversion systems (WECSs) has been proposed. The solution of the algebraic Riccati equation (ARE) has been found for the extended dimension of the state space equation of the system. The state v...

This paper proposes a sliding-mode observer (SMO) based cascaded proportional-integral (PI) controller design for LC-filtered three-phase voltage source inverters (VSI). First, the proposed SMO-based PI-PI controller contributes to further improvements by providing good control performances in the transient state and steady state with minimal tunin...

This study examines the characteristics of various scanning trajectories or patterns under the influence of scanning parameters in order to develop a theory to define their corresponding image resolutions. The lack of an accurate estimation of pixel size for a specified set of scanning parameters and their connection is a key challenge with existin...

This article proposes a new control scheme with a nonlinear quadratic regulator (NQR) associated with a hybrid switching stage for permanent magnet synchronous generator-based wind turbines (WTs). The proposed method shows a new approach combining a nonlinear optimal control method with a hybrid switching stage for WT generations (WTGs). As the WTG...

The current study concerns with improving the performance of a renewable energy system using systematic designed control algorithms. The performance of system under study is evaluated under two operating scenarios: the first in which the system is consisted of only a wind driven synchronous generator connected to the utility grid; meanwhile in the...

The International Conference on Power, Energy and Cybernetics (ICPEC) is an initiative to connect students, researchers and engineers all over the world who are studying, researching and working on the fields of Power, Energy and Control. It is intended to be organized biannually for scholars to share their wisdoms and visions in the related fields...

Three-phase dual active bridge converters (DAB3) are a widely used topology in battery charging applications thanks to their numerous advantages, such as bidirectional power flow, galvanic isolation, low output current ripple, and inherent soft-switching. In such applications, three single-phase transformers are commonly employed as the AC-link to...

Small-scale permanent magnet motor to reach high torque density and low torque ripple is discussed in this research. To increase the torque density, meanwhile making the motor size smaller and lighter, the motor axial length within a constrained diameter is optimized in view of various pole-slot configurations. Different slot-poles are selected and...

This paper presents a novel auto-tuning proportional derivative (PD) controller based on fuzzy logic for significant reduction of selective current harmonics in interior permanent magnet synchronous motor (IPMSM) drive systems under silicon carbide (SiC) inverter excitation, where the ultimate goal is to mitigate the IPMSM copper loss and SiC inver...

This article presents a comprehensive review of current Magnetic Imaging Techniques (MIT), specifically Magnetic Particle Imaging (MPI) and Magnetic Resonance Imaging (MRI) methods as well as their impacts and potential in biomedical applications. The paper particularly focuses on several perspectives of MPI and MRI techniques including technical c...

The necessity of rejecting the external disturbance and model uncertainty is vital for control design to achieve high performance and robustness of the system. Disturbance cancelation techniques are, therefore, of interest for both academic and industrial research and development. Among them, disturbance observer based control (DOBC) and active dis...

This paper proposes a novel disturbance rejection control scheme for permanent magnet synchronous motor (PMSM) drives. Based on the framework of modified disturbance observer (DOB)-based control, the final topology of the proposed disturbance rejection proportional–integral (DR-PI) controller includes a pre-filter and a controller in a proportional...

⇨[Update 8 Apr 2022] There were 11 research papers submitted to our Special Session in the conference IEEE ICCE 2022. Thank you very much. 🌟Submission Deadline: 8 Apr 2022 ⇨Homepage: https://ieee-icce.org/category/special-sessions 🌟You are warmly welcomed to submit 5-page papers to our Special Session: "Advances in Design and Control of Power Conve...

("Featured Paper" in journal ENERGIES: WoS SCIE, I.F. = 3.252, Scopus Q1, CiteScore = 5.0) This work presents a control scheme to control a grid-connected single-phase photovoltaic (PV) system. The considered system has four 250 W solar panels, a non-inverting buck-boost DC-DC converter, and a DC-AC inverter with an inductor-capacitor-inductor (LCL...

In this article, integral servomechanism based state‐dependent Riccati equation (SDRE) nonlinear output feedback control for wind energy conversion systems (WECSs) has been proposed. The numerical off‐line solving the proposed SDRE control requires to formulate algebraic Riccati equation and algebraic Lyapunov equation. This method approximates the...

This paper proposes a generalized high-order observer for estimating total disturbance of permanent magnet synchronous motors (PMSMs). This total disturbance is dominated by load torque but also includes many other terms such as frictions, viscous force, Eddy and flux pulling forces, and noises. Comprehensive experimental results and analyses under...

[Update 10 Feb 2022: This paper was published as a "Featured Paper" in journal ENERGIES (WoS SCI-E, I.F. = 3.0, Scopus Q1, CiteScore = 4.7) after thorough peer-review process [URL: www.mdpi.com/1996-1073/15/4/1286 ] - This work presents a control scheme to control the grid-connected single-phase photovoltaic (PV) system. The considered system has f...

This paper proposes a super-twisting adaptive sliding mode control law for maximum power point tracking of wind energy conversion systems based on permanent magnet synchronous generators (PMSGs). The employed sliding mode control algorithm can be considered an effective solution, as it retains the robustness properties of classical sliding mode con...

The Special Issue "Recent Issues on Motors and Motor Drives" in the international prestigious journal ELECTRONICS has been completed, in which A/Prof. Ton Duc Do and I have served as the Guest Editors. A total of 10 research manuscripts was submitted to the Special Issue, of which only 5 research papers were accepted for publication after the thoro...

The problem of tracking the maximum power point for the wind energy conversion system (WECS) is taken into consideration in this paper. The WECSs in this article is simultaneously affected by the uncertainties and the arbitrary disturbance that cause the WECSs to be much more challenging to control. A new method to synthesize a polynomial disturban...

The paper introduces a new design for the predictive control of IM drives. The design of the proposed controller is performed through studying the interconnection between the motor's torque and slip speed. The contribution of the new strategy is illustrated through the simplified error function design which includes two similar terms of the same ca...

The study presents an effective predictive voltage control (PVC) scheme for a variable speed DFIG. The implementation of the PVC is articulated on a unique cost-function which concerns with the error minimization between the desired and actual rotor voltages. Thus, the cost function does not contain any estimated terms as implemented in the model p...

This article presents a novel model predictive voltage control (MP VC) for a doubly fed induction generator (DFIG) without a speed sensor. The methodology of the considered MP VC is articulated on the direct voltage control by incorporating the deadbeat control principle within the model predictive topology. The derivation of the utilized cost func...

This article presents a novel model predictive voltage control (MP VC) for a doubly fed induction generator (DFIG) without a speed sensor. The methodology of the considered MP VC is articulated on the direct voltage control by incorporating the deadbeat control principle within the model predictive topology. The derivation of the utilized cost func...

This article presents the assessment of time-dependent national-level restrictions and control actions and their effects in fighting the COVID-19 pandemic. By analysing the transmission dynamics during the first wave of COVID-19 in the country, the effectiveness of the various levels of control actions taken to flatten the curve can be better quant...

Underwater vehicles (UVs) are subjected to various environmental disturbances due to ocean currents, propulsion systems, and un-modeled disturbances. In practice, it is very challenging to design a control system to maintain UVs stayed at the desired static position permanently under these conditions. Therefore, in this study, a nonlinear dynamics...

This paper presents the assessment of time-dependent national-level restrictions and control actions and their effects in fighting the COVID-19 pandemic. By analysing the transmission dynamics during the first wave of COVID-19 in the country, the effectiveness of the various levels of control actions taken to flatten the curve can be better quantif...

Nowadays, underwater vehicles (UVs) are applied to various tasks such as carrying objects or maintenance of underwater structures. To carry out well these tasks, UVs should keep the position and orientation in the water to perform the specified tasks. However, the systems used in underwater operations are always under the influence of disturbance s...

This paper focuses on designing a disturbance observer-based control (DOBC) system for PMSM drives. The cascade structure of the discrete-time PI-PI control system with tracking anti-windup scheme has been designed for both loops. In this study, high order disturbance observer (HODO) based control is used to improve the speed tracking performance o...

This paper proposes an enhanced cyber secure energy and data transaction framework for the optimal operation and management of the smart city. Recently, the concept of smart city within the power systems has taken the center stage. Although the power system full monitoring and accessibility is guaranteed through the smart city concept, the risk of...

The wind energy conversion system (WECS) is a system which allows the conversion of wind-generated kinetic energy to electrical energy. One of the currently used systems to generate electrical energy is the permanent magnet synchronous generator. The proposed control method in this paper is Takagi–Sugeno (T–S) fuzzy model-based integral sliding mod...

This paper proposes a new approach to design a fault-tolerant control (FTC) scheme for tracking the optimal power of wind energy conversion systems (WECSs). In this paper, the considered fault will not only impact on actuator but also sensors. As the fault severely affects the performance of WECSs, the FTC are required to be worked accurately and e...

This paper introduces a direct model predictive voltage control (DMP VC) for a sensorless five-phase induction motor drive. The operation of the proposed sensorless DMP VC is based on the direct control of the applied stator voltages instead of controlling the torque and flux as in model predictive direct torque control (MP DTC). Thus, the simplici...

Recently, building an accurate mathematical model with the help of the experimentally measured data of solar cells and Photovoltaic (PV) modules, as a tool for simulation and performance evaluation of the PV systems, has attracted the attention of many researchers. In this work, Coyote Optimization Algorithm (COA) has been applied for extracting th...

This paper proposes a simple direct control with fast convergence rates under constraints for tracking optimal power of permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). The simplicity features are on neglecting the following: predicted control performances, measurement of aerodynamic torque/wind speed and st...

This paper aims to develop an innovative sensorless control approach for a five-phase induction motor (IM) drive. The operation principle of the sensorless scheme is based on the sliding mode theory, within which a sliding mode observer (SMO) estimates the speed and rotor resistance simultaneously. The operation methodology of the proposed control...

ARTICLE INFO Keywords Asymptotic stability (A.S) Direct control Finite control set model predictive control (FCS-MPC) Nonlinear observer Permanent magnet synchronous generator (PMSG) Wind turbine ABSTRACT This paper proposes a simple direct control with fast convergence rates under constraints for tracking optimal power of permanent magnet synchron...

This paper proposes a novel integral sliding mode control (ISMC) scheme based on numerically solving a state-dependent Ricatti equation (SDRE), nonlinear feedback control for wind energy conversion systems (WECSs) with permanent magnet synchronous generators (PMSGs). Unlike the conventional ISMC, the proposed control system is designed with nonline...

Integrating wind power plants (WPPs) into power systems is increasing dramatically now a day. However, the dynamic performance of power systems will be affected by the large penetration level of such renewable sources of energy. From this context power system operators and transmission system operators have put regulation rules to keep pushing wind...

Integrating wind power plants (WPPs) into power systems are increasing dramatically now a day. However, the dynamic performance of power systems will be affected by the large penetration level of such renewable sources of energy. From this context power system operators and transmission system operators have put regulation rules to keep pushing win...

A high-speed supercavitating vehicle is a future underwater vehicle which exploits the supercavitating propulsion technology providing a promising way to increase the vehicle speed. Robust control challenges include complex vehicle maneuvering dynamics caused by factors such as undesired switching, delayed state dependency, and nonlinearities. As e...

Recently, wind power production has been under the focus in generating power and became one of the main sources of alternative energy. Generating of maximum power from wind energy conversion system (WECS) requires accurate estimation of aerodynamic torque and uncertainties presented in the system. The current paper proposed the generalized high‐ord...

The paper introduces a cost effective predictive flux control (PFC) approach for a sensorless doubly fed induction generator (DFIG). The base operation of the proposed PFC depends on controlling the rotor flux (α-β) components using a cost function which is derived through analyzing the relationship between the electromagnetic torque and the angula...

The paper introduces a cost effective predictive flux control (PFC) approach for a sensorless doubly fed induction generator (DFIG). The base operation of the proposed PFC depends on controlling the rotor flux (a-b) components using a cost function which is derived through analyzing the relationship between the electromagnetic torque and the angula...

Model predictive control (MPC) has become one of the well-established modern control methods for three-phase inverters with an output LC filter, where a high-quality voltage with low total harmonic distortion (THD) is needed. Although it is an intuitive controller, easy to understand and implement, it has the significant disadvantage of requiring a...

In this paper, a simulation model describing the operation of a PV/wind/diesel hybrid microgrid system with battery bank storage has been proposed. Optimal sizing of the proposed system has been presented to minimize the cost of energy (COE) supplied by the system while increasing the reliability and efficiency of the system presented by the loss o...

Abstract—This study proposes high –order disturbance observer (HODO) SMC method along with HODO load torque observer to control speed of SPMSM system under speed and load torque variations has been proposed. Firstly, dynamic system of the SPMSM has been formulated. Secondly, switching feedback control law with use of continuous approximation of sli...

Abstract—This paper proposes a fault-tolerant control system for interior permanent magnet synchronous motor (IPMSM) drives operating in the middle and high speed regions. The proposed control system is capable of dealing with encoder’s failures, hence increase the reliability and performance of PMSM. Sensor’s setup of the control system consists o...

Abstract — This paper presents an application of a nonlinear ISMC control method combined with H-∞ control method in SPMSM robust control. ISMC control is able to attenuate matched disturbances and solves the reaching phase problem. H-∞ control was utilized as a nominal controller with SM load torque observer for reference speed tracking and for fu...

A sliding mode control (SMC) is a good candidate for design nonlinear system robust to any presented uncertainties. Unfortunately, during the reaching phase, the SMC does not guarantee the stability of the system. To solve this problem the Integral sliding mode controller (ISMC) was introduced. The ISMC consists of two controls such as nominal cont...

The issue of tracking the optimal power for wind energy conversion systems (WECSs) via regulating the rotor speed of the generator is taken into account in this study. Additionally, a novel polynomial observer is proposed for estimating not only aerodynamic torque in WECSs but also d‐axis and electromagnetic torque. Therefore, in this new approach,...

This paper introduces the development of a one-degree-of-freedom (1DOF) power assist device that helps to lift objects and facilitate the operator’s job. Existing designs were examined for different control approaches and human-robot cooperation intuitiveness. The project involves the mechanical design of the experimental setup and development of a...

Model predictive control (MPC) has become one of the well-established modern control methods for three-phase inverters with an output LC filter, where a high-quality voltage with low total harmonic distortion (THD) is needed. Though it is an intuitive controller easy to understand and implement, it has the significant disadvantage of requiring a la...

This paper studies a new approach for synthesizing an observer to estimate both unmeasurable states and faults of the T-S fuzzy system with uncertainties, simultaneously where the bounded constraints of the uncertainties are unnecessary. Both continuous and discrete time systems are taken into account. To deal with the uncertainties and faults, fir...

Chaotic phenomenon of power electronic systems and electric motor drives were introduced a few decades ago and has been followed with numerous of published work. However, chaos of permanent magnet synchronous motors (PMSMs), in particular, did not receive enough deserved interest. Considering this fact, this paper introduces a robust suboptimal con...

Tip speed ratio control is a popular method in wind energy conversion systems in order to capture the maximum power. This method, however, requires wind speed information, which is difficult in practice to accurately measure it. Therefore, estimation methods are usually applied, where a high‐precision estimate leads to a high‐efficient system. Base...

In this paper, a generalized disturbance observer (GDO) is proposed for estimating a broad range of disturbances including fast-varying ones. The estimation error of the proposed GDO is proven to be ultimately bounded provided that an arbitrary rth time derivative of disturbance is bounded. A broader range of disturbances can be estimated by the pr...

Alzheimer’s disease (AD) is the most prevalent age-related neurodegenerative disease, pathologically characterized by the accumulation of amyloid beta (Aβ) aggregation in the brain. Here, we describe for the first time the development of a new, pioneering nanotechnology-based drug delivery approach for potential therapies of neurodegenerative disea...

Magnetic nanorobots are recently used in a drug delivery system in order to perform minimally invasive medical procedures. One main difficulty for controlling nanorobots is the complicated behavior of hydrodynamic drag force and uncertain factors in their dynamics. The drag force depends on the blood velocity but unfortunately, it is apparently unk...