Hyperspectral Imaging comprises excessive data consequently leading to significant challenges for data processing, storage and transmission. Compressive Sensing has been used in the field of Hyperspectral Imaging as a...
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In this study, we explore the enhancement of stability in a four-machine power system through the optimized tuning of Tilt-Integral-Derivative Power System Stabilizer (TID-PSS) parameters. We introduce a novel applica...
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Addressing control performance of the Permanent Magnet Synchronous Motor (PMSM) with sensorless controlsystems which use Field Oriented control (FOC), this paper proposes a control structure which uses a Super Twisti...
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ISBN:
(数字)9798350364293
ISBN:
(纸本)9798350364309
Addressing control performance of the Permanent Magnet Synchronous Motor (PMSM) with sensorless controlsystems which use Field Oriented control (FOC), this paper proposes a control structure which uses a Super Twisting-Terminal Sliding Mode control (ST-SMC) type control. Moreover, concerning the speed estimation for the PMSM rotor, the performance of a Sliding Mode Observer (SMO) type observer is improved by using a Phase Locked Loop (PLL) control technique. The control performance of the sensorless control system is improved by optimally tuning the parameters of the ST-SMC controller using an Ant Colony Optimisation (ACO) algorithm. The control structures, observer and controller synthesis and proof of their convergence are also presented. Several computer simulations achieved in the Matlab/Simulink software environment demonstrate the superiority of the proposed sensorless PMSM control system compared to the classical version. The performance criteria used for comparisons are classical indicators such as settling and rise time, speed signal ripple, stationary error, and Total Harmonic Distortion (THD).
During the last few years, there has been a growing interest in the topic of using natural or synthetic esters as an alternative to mineral oils in oil transformers due to the easier way to obtain them and their abili...
During the last few years, there has been a growing interest in the topic of using natural or synthetic esters as an alternative to mineral oils in oil transformers due to the easier way to obtain them and their ability to exhibit better electrical properties. In addition, more and more researchers are describing in their work that doping esters with nanoparticles is capable of further improving these properties. Therefore, in the current work, it was decided to see what effect the addition of a hydrophobic carbon shell iron nanoparticle to ORLEN mineral oil and Midel 7131 synthetic ester would have on selected electrical parameters of the insulating fluid, i.e. breakdown voltage and electrical strength.
In this work, a method for hierarchical hybrid linear-nonlinear microgrid control is proposed based on nonlinear primary control and linear secondary control. The nonlinear controller is an Extended Feedback Lineariza...
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Usually, a controller for path- or trajectory tracking is employed in autonomous driving. Typically, these controllers generate high-level commands like longitudinal acceleration or force. However, vehicles with combu...
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EVs will play an important role in transport, climate change and electrification. However, there is a consensus that one of the main obstacles to full market penetration of EVs is the so-called range anxiety (fear of ...
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EVs will play an important role in transport, climate change and electrification. However, there is a consensus that one of the main obstacles to full market penetration of EVs is the so-called range anxiety (fear of not having enough charge in the vehicle). Electric vehicle charging infrastructures have two opposing approaches to their use. For urban routes, where distances travelled, and EV usage times are low, on-board alternative current (AC) chargers (Level 1 and 2) can meet the charging requirements in most situations. The solution is a gradual increase of the existing electrical infrastructure and charging points, together with the integration of new energy sources to cope with the new loads. On the other hand, on highway routes, EVs require large amount of energy in a short time in order to provide a continuous trip. Nowadays, electric charging stations provide fast charging points for vehicles by connecting external chargers that supply direct current (DC) directly to the battery bank (Level 3) and these can take up to 30 minutes. However, a time of more than 10 minutes is considered to be a very long time in contrast to the time required to fill the tank of internal combustion vehicles. In this context, ultrafast charging is defined with charging time to 10 minutes or less. This report proposes the electrical architecture of an ultrafast charging station for electric vehicles (EVs), which is based on a hybrid energy distribution system made up of an AC bus and two DC buses, each one of different voltage. The proposal is the result of a statistical analysis based on Monte Carlo simulations, which uses real traffic data and stochastic models to estimate the number of vehicles, the energy required and the time to charge each EV that would access the station. Once the architecture is established, the operating modes of the station are defined, where a storage system is contemplated to provide service reliability, and which is sized following load levelling and
Starting from the fact that the Field Oriented control (FOC) control strategy of the Permanent Magnet Synchronous Motor (PMSM) gives good results in terms of the usual indicators of response time quality, overshoot, s...
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ISBN:
(数字)9798350364293
ISBN:
(纸本)9798350364309
Starting from the fact that the Field Oriented control (FOC) control strategy of the Permanent Magnet Synchronous Motor (PMSM) gives good results in terms of the usual indicators of response time quality, overshoot, steady-state error, but only in the usual operating range of the PMSM. The Maximum Torque Per Ampere (MTPA) control type strategy is utilised to limit current during operation while maintaining the required load torque, while the Field Weakening (FW) control type strategy is used to achieve speeds above the rated speed of the PMSM. These strategies are also complemented by the use of a Model Reference Adaptive System (MRAS) observer for PMSM rotor speed estimation and a Butterfly Optimization Algorithm (BOA) for achieving optimal values of the PI speed controller according parameters. The PMSM operating equations and the FOC, MTPA, and FW control strategies are also presented, together with the implementation structures in the Matlab/Simulink software programming environment. The features of these PMSM controlsystems in the corresponding operating regimes are presented through numerical simulations accomplished through Matlab/Simulink.
Fused deposition modelling (FDM) is simulated in this research work to anticipate the characteristics of 3D printed parts. Eight FDM variables are studied for Polyether-ether-ketone (PEEK) and Polyether-ketone-ketone ...
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In this paper, an adaptive semi-active suspension system by adjusting air springs is proposed to design of vehicle stability control system, which can achieve handling stability. In order to develop the adaptive contr...
In this paper, an adaptive semi-active suspension system by adjusting air springs is proposed to design of vehicle stability control system, which can achieve handling stability. In order to develop the adaptive control algorithm, the CarSim dynamic model is acquired, and a reinforcement learning scheme using the deep deterministic policy gradient (DDPG) control strategy is used to decide the best amount of air spring pressure. This method is able to adjust the yaw activity to avoid understeer and oversteer issues as well as increasing the vehicle stability. In summary, the simulation results show that the handling stability is improved by 25.78 % under high road curvatures.
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