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Journal articles on the topic 'Controlled-velocity electric drive'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Tian, Tian, Gang Li, Yuzhi Li, Ning Li, and Hongfei Bai. "Trajectory Tracking Control Study of Unmanned Fully Line-Controlled Distributed Drive Electric Vehicles." Applied Sciences 13, no. 11 (2023): 6465. http://dx.doi.org/10.3390/app13116465.

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Unmanned fully line-controlled distributed drive electric vehicles with four-wheel independent drive, dependent braking and dependent steering have significant advantages over conventional vehicles in terms of dynamic control, but at the same time multiple actuators with multiple degrees of freedom also pose the risk of failure in the steering system, which is studied in this paper for trajectory tracking control. Rational control of multiple systems such as drive, braking, steering and fault tolerance of the unmanned fully line-controlled distributed drive electric vehicles are carried out. F

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2

Glazyrin, Alexander S., Sergey N. Kladiev, Vadim V. Timoshkin, et al. "SETUP AND INVESTIGATION OF THE OPERATION MODES OF THE SPEED OBSERVER IN A CONTROLLED DC ELECTRIC DRIVE." ELECTRICAL AND DATA PROCESSING FACILITIES AND SYSTEMS 19, no. 2 (2023): 30–42. http://dx.doi.org/10.17122/1999-5458-2023-19-2-30-42.

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In modern closed-loop controlled electric drives used in manufacturing, the use of speed, current, torque, and other technological variable sensors is required. In some cases, indirect estimation of the electric drive state vector is required, when the use of technological parameter sensors (primarily speed sensors) is difficult or impossible. One of the problems is the length of the information cable in the feedback channel from the actuator to the power converter, which makes it difficult to use direct measurement methods. There are also difficulties in using sensors in an aggressive environ

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3

Dimukasheva, Gulnaz, Bulat Zekrin, Roman Kirillov, Dmitry Strelnikov, and Regina Khazieva. "ANALYSIS OF STABILITY OF A THE VARIABLE-FREQUENCY DRIVES OF THE MAIN PUMPS." Electrical and data processing facilities and systems 18, no. 3-4 (2022): 13–22. http://dx.doi.org/10.17122/1999-5458-2022-18-3-4-13-22.

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Relevance The problem of saving electricity consumption is becoming a topical and important issue nowadays. A large number of electric motors are operated irrationally due to inefficient or non-existent control systems. Most of these motors are used for mainline pumping units. The use of modern technologies of frequency-controlled electric drive makes it possible to save at least 20% of electric power in comparison with classical methods of regulation and increase the electric motor stability. Aim of research The stability of a frequency-controlled main pumping unit in case of supply voltage f

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Skřivánek, Josef, Martin Bílek, and Michal Kašpárek. "Control Optimisation of the New Drive of Small Diameter Knitting Machines." Autex Research Journal 17, no. 1 (2017): 1–5. http://dx.doi.org/10.1515/aut-2015-0024.

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Abstract The article is concerned with the issues of the drive of small diameter knitting machines. In connection to the proposal of optimum structure of the driving systems of the machine, there have been analysed the possibilities of precisely controlled servo drives. An optimised structure of the drives allows for the utilisation of precisely defined position and velocity functions. There is applied here the function of a polynomial of 7th degree, proposed for impact-free course of the acceleration, and it is compared with the results corresponding to the existing structure of drives of kni

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5

Yang, Jiabin, and Xiaoning Li. "Research on the smooth velocity control of a driving switching process of a new pneumatic electric hybrid actuator." Mechanical Sciences 12, no. 2 (2021): 971–82. http://dx.doi.org/10.5194/ms-12-971-2021.

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Abstract. In order to meet the application requirements of fast-moving, accurate positioning, and low cost, a new type of pneumatic electric hybrid actuator was developed with a positioning accuracy of 0.01 mm. It was found that the velocity fluctuation would occur in the process of driving switching due to the “stop then restart” strategy, resulting in stumbling when positioning. To solve this problem, the basic characteristics of the drive switching mechanism were tested and analyzed. A driving switching strategy called “relay and run” was proposed based on the response characteristics of th

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SOUNART, T. L., and J. C. BAYGENTS. "Lubrication theory for electro-osmotic flow in a non-uniform electrolyte." Journal of Fluid Mechanics 576 (March 28, 2007): 139–72. http://dx.doi.org/10.1017/s0022112006003867.

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A lubrication theory has been developed for the electro-osmotic flow of non-uniform buffers in narrow rectilinear channels. The analysis applies to systems in which the transverse dimensions of the channel are large compared with the Debye screening length of the electrolyte. In contrast with related theories of electrokinetic lubrication, here the streamwise variations of the velocity field stem from, and are nonlinearly coupled to, spatiotemporal variations in the electrolyte composition. Spatially non-uniform buffers are commonly employed in electrophoretic separation and transport schemes,

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7

Dunaev, Mihail, and Sarfaroz Dovudov. "SIMULATION OF A CLOSED SYSTEM OF A DC ELECTRIC DRIVE WITH A WIDTH-PULSE CONVERTER." Bulletin of the Angarsk State Technical University 1, no. 15 (2022): 42–47. http://dx.doi.org/10.36629/2686-777x-2021-1-15-42-47.

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This article investigates the regulation of the angular speed of an electric drive (ED) with a pulse-width converter (PWC) and a direct current motor (DC motor) of independent excitation (NV) when controlled in a closed-loop system. A proportional-integral (PI) -regulator was used as a regulator of the angular velocity. To analyze the processes in the closed-loop SHIP-DPT system, the methods of simulation are used. The principle of operation of an electric drive with control from a PWM is described. Developed and modeled EP circuits with PWM in the Matlab environment using blocks from the Simu

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8

Glazyrin, Alexander S., Evgeniy I. Popov, Vladimir A. Kopyrin, et al. "Critical expert analysis of permanent magnet synchronous motors identification methods and state variable observers." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 6 (2024): 240–56. http://dx.doi.org/10.18799/24131830/2024/6/4735.

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Relevance. In recent years, the oil industry has seen a tendency to transfer low-yield oil wells to intermittent mode. Unregulated electric drive and the open-loop controlled electric drive of electric centrifugal pumping with permanent magnet synchronous motors are typically not suitable for tasks of intermittent operation of wells. Due to objective reasons, there may not be smooth starts and required quality indicators of transient processes, which leads to even more reduction in oil production. The synthesis of a closed-loop electric drive control system of submersible installations is poss

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9

Kuzyk, Rostyslav-Ivan V., and Ihor Z. Shchur. "Mode decomposed passivity-based speed control of DC drive with bidirectional Zeta-SEPIC DC-DC converter for light electric vehicles." Herald of Advanced Information Technology 7, no. 1 (2024): 71–84. http://dx.doi.org/10.15276/hait.07.2024.6.

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Currently, light electric vehicles are rapidly developing in various kinds. To power these vehicles with batteries, the simplest electric drive system is a DC motor controlled by a DC-DC converter. This work utilizes a bidirectional Zeta-SEPIC DC-DC converter with an integrated DC motor. This implementation enables control of motor speed and torque in traction and regenerative braking modes. Additionally, it allows for the use of a lower voltage battery compared to the motor's rated voltage, reducing battery weight and increasing safety. In this work, a decomposition approach is applied. Two s

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10

Solovyov, S. V., V. Yu Romanenko, and V. G. Chernikov. "Development of Remote-Controlled Self-Propelled Flax Windrow Turner." Agricultural Machinery and Technologies 18, no. 4 (2024): 10–16. https://doi.org/10.22314/2073-7599-2024-18-4-10-16.

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The paper highlights efforts by major global engineering companies to develop agricultural robotic systems, with a particular focus on universal unmanned mobile energy vehicles designed to perform technological operations autonomously. Analysis of current machinery for harvesting and preparing flax straw indicates a lack of sufficient automation and robotization in these processes. Among the operations involved in flax harvesting, turning is defined as the least energy-intensive. In this regard, research has begun on the development of a remotely controlled, self-propelled flax windrow turner,

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11

Denisov, Y. O., O. I. Denisov, and O. O. Bursala. "Synthesis of the digital regulator of the main contour of the three-circuit system of the linear electric drive of the working body of the mechanism of onboard aviation equipment." Electrical Engineering & Electromechanics, no. 4 (July 29, 2021): 39–45. http://dx.doi.org/10.20998/2074-272x.2021.4.05.

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Goal The purpose of the article is to further develop analytical methods for calculating and synthesizing power electronics systems with deep pulse width modulation (PWM). A three-circuit linear electric drive system for positioning the working body of the mechanism of onboard aircraft equipment, in which the linear electric motor is controlled from a pulse width converter (PWC), is considered. The power converter is included in the current loop. It has a noticeable effect on the level of current ripple, travel speed and positioning accuracy of the operating mechanism of a linear electric driv

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12

Osadchyy, Volodymyr, Olena Nazarova, Taras Hutsol, et al. "Adjustable Vibration Exciter Based on Unbalanced Motors." Sensors 23, no. 4 (2023): 2170. http://dx.doi.org/10.3390/s23042170.

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In European industry, such as metallurgical, mining and processing, construction, food, and chemical, vibration exciters are used, which indicates their wide and, in some cases, unique technological capabilities. The most common are electromagnetic and unbalanced vibration exciters. The advantages of electromagnetic vibration exciters include the ability to control the amplitude of the vibration by changing the electrical power supplied; the disadvantages are high material consumption. However, unbalanced vibration exciters have low energy efficiency, which is associated with difficult start-u

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13

Y., O. Denisov, I. Denisov O., and O. Bursala O. "Synthesis of the digital regulator of the main contour of the three-circuit system of the linear electric drive of the working body of the mechanism of onboard aviation equipment." Electrical Engineering & Electromechanics, no. 4 (August 2, 2021): 39–45. https://doi.org/10.20998/2074-272X.2021.4.05.

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<strong><em>Goal </em></strong><em>The purpose of the article is to further develop analytical methods for calculating and synthesizing power electronics systems with deep pulse width modulation (PWM). A three-circuit linear electric drive system for positioning the working body of the mechanism of onboard aircraft equipment, in which the linear electric motor is controlled from a pulse width converter (PWC), is considered. The power converter is included in the current loop. It has a noticeable effect on the level of current ripple, travel speed and positioning accuracy of the operating

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14

V., A. Lebedev, V. Zhuk G., J. Оstroverkhov N., and M. Khalimovskyy A. "CONTROL OF VALVE ELECTRIC DRIVE COORDINATES OF AUTOMATED WELDING EQUIPMENT FEED MECHANISMS." Electrical engineering & electromechanics, no. 6 (December 17, 2020): 24–29. https://doi.org/10.20998/2074-272X.2020.6.04.

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<strong><em>Goal.</em></strong><em> Finding ways to improve the quality of operation of the electrode wire feeder in terms of increasing the frequency of undistorted pulse feed with controlled characteristics, in particular its speed, as well as developing methods to simplify the adjustment of regulators of fast-acting electric drive to improve the results of the arc welding and surfacing process. <strong>Methodology.</strong> In the work, methods of analysis of existing technical solutions were used to increase the speed of operation of electric drives for a specific purpose wi

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Coelho, Andre L. de F., Daniel M. de Queiroz, Domingos S. M. Valente, and Francisco A. C. Pinto. "Development of a Variable-Rate Controller for a Low-Cost Precision Planter." Applied Engineering in Agriculture 36, no. 2 (2020): 233–43. http://dx.doi.org/10.13031/aea.13784.

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HighlightsA low-cost controller for variable-rate seeding was developed.The controller successfully identified management zones and changed the angular velocity of the seed metering device.The variable-rate controller maintained the actual seeding rate according to the prescribed seeding map.Abstract. The use of machines for variable-rate applications is becoming popular in modern agriculture. Due to the presence of imported and complex components, the acquisition cost of these machines is high for smallholder farmers. Several studies have been carried out using low-cost components in the deve

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16

Gade, Chandrasekhar Reddy, and Razia Sultana Wahab. "Conceptual Framework for Modelling of an Electric Tractor and Its Performance Analysis Using a Permanent Magnet Synchronous Motor." Sustainability 15, no. 19 (2023): 14391. http://dx.doi.org/10.3390/su151914391.

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The purpose of this article is to model and validate the propulsion system of an electric tractor. Initially, the mathematical model of the ET and its load characteristics are developed based on the velocity profiles used in the agriculture ploughing operations. A PMSM is selected from the torque and power requirement of the ET. In order to replicate the ET load on the PMSM, the load is simulated in accordance with the specifications of the PMSM drive system. This article proposes a novel load-tracking control of the propulsion unit with the arrangement of a PMSM and dynamometer. The speed and

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17

Czerepicki, A., A. Górka, and J. Szustek. "Analysis of Trams’ Consumption Depending on the Type of Traffic Light Used." Science & Technique 18, no. 6 (2019): 490–94. http://dx.doi.org/10.21122/2227-1031-2019-18-6-490-494.

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In the XXI century, when environmental awareness is growing and the impact of human activity on the planet is more and more noticeable, striving to minimize energy consumption seems to be a necessary direction in the development of technology. This development cannot take place without an initial understanding and describing the relationships influencing specific technologies. It also needs empirical verification of assumed theories. Modern trams play an important role in the functioning of urban transport. Being one of the oldest modes of environmentally friendly transport, in European capita

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18

Avalos, Gustavo O. Guarniz, Milad Shadman, and Segen F. Estefen. "Application of the Latching Control System on the Power Performance of a Wave Energy Converter Characterized by Gearbox, Flywheel, and Electrical Generator." Journal of Marine Science and Application 20, no. 4 (2021): 767–86. http://dx.doi.org/10.1007/s11804-021-00238-7.

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Abstract The latching control represents an attractive alternative to increase the power absorption of wave energy converters (WECs) by tuning the phase of oscillator velocity to the wave excitation phase. However, increasing the amplitude of motion of the floating body is not the only challenge to obtain a good performance of the WEC. It also depends on the efficiency of the power take-off system (PTO). This study aims to address the actual power performance and operation of a heaving point absorber with a direct mechanical drive PTO system controlled by latching. The PTO characteristics, suc

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19

Stankov, Stanko. "Modern control of mineral wool production process." Chemical Industry 67, no. 2 (2013): 375–84. http://dx.doi.org/10.2298/hemind120428069s.

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In this paper, the control of the plant for mineral wool production consisting of a number of the technological units of different sizes and complexity is considered. The application of modern equipment based on PLC (Programmable Logic Controller) and SCADA (Supervisory Control And Data Acquisition) configuration provides optimal control of technological process. Described supervisory and control system is consisting of a number of units doing decentralized distributed control of technological entities where all possible situation are considered during work of machines and devices, which are i

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20

Stasevych, Ryshard, Vasyl Zberovskyi, Ruslan Ahaiev, Yevhen Tyshchenko, Roman Savochenko, and Dmytro Yelatontsev. "Study of modes and parameters of mineral raw material grinding process in ball drum mills." Geo-Technical Mechanics, no. 167 (2023): 13–24. http://dx.doi.org/10.15407/geotm2023.167.013.

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The paper presents the results of research on the vibration-acceleration signal of the ball mill drum bearing support depending on its load when grinding mineral raw materials. Investigations of vibration sensor readings, installed on the bearing support of the mill drum, and amplitudes of the vibration-acceleration signal from the volumetric filling of the installation drum have been carried out. The dependences of vibro-acceleration signal amplitudes on the frequency spectrum of Fourier series at different volumetric filling of the mill drum in the interval of loads from 0 t/h to 18 t/h are

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21

Reddy, G. Tirupathi, S. Masum Basha, and D. David Living Stone. "Electric Vehicle Application Based Fuzzy with Vector Control Controlled High Speed SRM." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 11, no. 2 (2020): 762–67. http://dx.doi.org/10.61841/turcomat.v11i2.14441.

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A high-speed motor is a workable way to achieve motor reduction in an electric vehicle (EV). A switching reluctance motor (SRM) can be utilized for high-velocity drives because of its robust and straightforward rotor construction. The driving concept is somewhat noisy and vibrational, but it works well. Because conventional techniques of current excitation entail a great deal of complexity, torque controllers are infamously hard to construct. It has been proposed that the fuzzy with vector control could help SRM drive overcome these problems. Vector control has not yet been applied to the SRM

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22

Torres, D., and J. Escandón. "Transient analysis of combined electroosmotic and pressure driven flow with multi-layer immiscible fluids in a narrow capillary." Revista Mexicana de Física 66, no. 2 Mar-Apr (2020): 137. http://dx.doi.org/10.31349/revmexfis.66.137.

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Because the development of techniques for pumping parallel flows in miniaturized systems are required, in the present investigation, a semi-analytical solution based in the matrix inverse method and by Laplace transform for the transient flow of multi-layer immiscible fluids in a narrow capillary, under electroosmotic and pressure driven effects, is obtained. The dimensionless mathematical model to solve the electric potential distribution and the velocity field in the start-up of flow, consist on the Poisson-Boltzmann and momentum equations, respectively. Here, the transported fluids are cons

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23

Snow, B., G. J. J. Botha, J. A. McLaughlin, and A. Hillier. "Onset of 2D magnetic reconnection in the solar photosphere, chromosphere, and corona." Astronomy & Astrophysics 609 (January 2018): A100. http://dx.doi.org/10.1051/0004-6361/201731214.

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Aims. We aim to investigate the onset of 2D time-dependent magnetic reconnection that is triggered using an external (non-local) velocity driver located away from, and perpendicular to, an equilibrium Harris current sheet. Previous studies have typically utilised an internal trigger to initiate reconnection, for example initial conditions centred on the current sheet. Here, an external driver allows for a more naturalistic trigger as well as the study of the earlier stages of the reconnection start-up process. Methods. Numerical simulations solving the compressible, resistive magnetohydrodynam

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Bandopadhyay, Aditya, Shubhadeep Mandal, N. K. Kishore, and Suman Chakraborty. "Uniform electric-field-induced lateral migration of a sedimenting drop." Journal of Fluid Mechanics 792 (March 3, 2016): 553–89. http://dx.doi.org/10.1017/jfm.2016.84.

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We investigate the motion of a sedimenting drop in the presence of an electric field in an arbitrary direction, otherwise uniform, in the limit of small interface deformation and low-surface-charge convection. We analytically solve the electric potential in and around the leaky dielectric drop, and solve for the Stokesian velocity and pressure fields. We obtain the correction in drop velocity due to shape deformation and surface-charge convection considering small capillary number and small electric Reynolds number which signifies the importance of charge convection at the drop surface. We sho

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25

Koitto, Teemu, Heikki Kauranne, Olof Calonius, Tatiana Minav, and Matti Pietola. "Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit." Energies 12, no. 8 (2019): 1538. http://dx.doi.org/10.3390/en12081538.

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In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The high energy saving potential of this system has been demonstrated in previous studies by the authors, but the dynamic characteristics of the ramped and P-controlled base system were considered unsatisfactory. Therefore, the system was implemented with an open-loop S-curve control that utilized a pre-calculated RPM (revolutions per minute) profile f

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26

Chao, Yanpu, Hao Yi, Fulai Cao, Yaohui Li, Hui Cen, and Shuai Lu. "Experimental Analysis of Wax Micro-Droplet 3D Printing Based on a High-Voltage Electric Field-Driven Jet Deposition Technology." Crystals 12, no. 2 (2022): 277. http://dx.doi.org/10.3390/cryst12020277.

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High-voltage electric field-driven jet deposition technology is a novel high resolution micro scale 3D printing method. In this paper, a novel micro 3D printing method is proposed to fabricate wax micro-structures. The mechanism of the Taylor cone generation and droplet eject deposition was analyzed, and a high-voltage electric field-driven jet printing experimental system was developed based on the principle of forming. The effects of process parameters, such as pulse voltages, gas pressures, pulse width, pulse frequency, and movement velocity, on wax printing were investigated. The experimen

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27

Ali, Ali Abdulkareem, Fatma Ben Salem, and Jamal A. K. Mohammed. "Design and implementation of jerk-controlled elevator systems using S-curve motion profiles." International Journal of Power Electronics and Drive Systems (IJPEDS) 16, no. 2 (2025): 780. https://doi.org/10.11591/ijpeds.v16.i2.pp780-793.

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Electric elevators often experience significant jerks that can shorten their lifespan and cause passenger discomfort, especially during acceleration and deceleration. To address this issue, this study presents the development and implementation of S-curve motion profiles for a prototype three-floor rope elevator system. The elevator cabin is driven by a three-phase induction motor using sensorless vector control technology, with a variable frequency drive (VFD) managing the cabin's velocity. The findings indicate that employing S-curve motion profiles reduces jerk by approximately 29.43% when

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28

Dun, Guoqiang, Xingpeng Wu, Xinxin Ji, and Yuhan Wei. "Design and Experiment of an Electric Control Spiral-Pushing Feed Mechanism for Field Fertilizer Applicator." Applied Sciences 13, no. 23 (2023): 12628. http://dx.doi.org/10.3390/app132312628.

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Due to the unique structural characteristics of the traditional spiral fertilizer applicator, the instantaneous filling coefficient cannot be determined, which is not conducive to achieving precise control of the fertilizer discharge rate. Therefore, a spiral-pushing fertilizer applicator has been designed. By using a structure of variable diameter and variable spiral pitch to squeeze fertilizer gradually, precise control of the fertilizer discharge is achieved. The study analyzes the effects of screw pitch, screw diameter, and rotational speed on the filling coefficient; it uses spiral pitch

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Parkinson, M. L., R. Polglase, B. G. Fejer, L. Scherliess, P. L. Dyson, and S. M. Ujmaia. "Seasonal and magnetic activity variations of ionospheric electric fields above the southern mid-latitude station, Bundoora, Australia." Annales Geophysicae 19, no. 5 (2001): 521–32. http://dx.doi.org/10.5194/angeo-19-521-2001.

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Abstract. We investigate the seasonal, local solar time, and geomagnetic activity variations of the average Doppler velocity measured by an HF digital ionosonde deployed at Bundoora, Australia (145.1° E, 37.7° S, geographic; 49° S magnetic). The Doppler velocities were heavily averaged to suppress the short-term effects (<3 hours) of atmospheric gravity waves, and thereby obtain the diurnal variations attributed to the tidally-driven ionospheric dynamo and electric fields generated by magnetic disturbances. The observed seasonal variations in Doppler velocity were probably controlled by var

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González-López, Juan Miguel, Sergio Sandoval Pérez, Ramón O. Jiménez Betancourt, and Gilberto Barreto. "Active Control for an Electric Vehicle with an Observer for Torque Energy-Saving." World Electric Vehicle Journal 14, no. 10 (2023): 288. http://dx.doi.org/10.3390/wevj14100288.

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Vehicle dynamics play an important role in determining a vehicle’s stability. It is necessary to identify and obtain models related to vehicle dynamics to evaluate the performance of electric vehicles, as well as how to control them. This paper presents fundamentals of vehicle dynamics, proposing a three-degree-of-freedom nonlinear observer and controller to control lateral velocity and tire torque in comparison to a PID control, while also utilizing a Lyapunov function to determine the stability of the controlled state feedback system concerning the observer, which estimates state errors. Thi

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Koralewski, Grzegorz. "Modelling of the system “driver - automation - autonomous vehicle - road”." Open Engineering 10, no. 1 (2020): 175–82. http://dx.doi.org/10.1515/eng-2020-0016.

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AbstractThe work presents a simulation model of a “driver–automation–autonomous vehicles–road” system which is the basis for synthesis of automatic gear shift control system. The mathematical description makes use of physical quantities which characterise driving torque transformation from the combustion engine to the car driven wheels. The basic components of the model are algorithms for the driver’s action logic in controlling motion velocity, logic of gear shift control functioning regarding direction and moment of switching, for determining right-hand side of differential equations and for

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32

Guo, Wei, Wei Cao, Xiang Wang, Qiqi Peng, and Lizhi Wu. "Fabrication and Optimization Design of Multilayer Flyer Plates for Laser-Driven Loading." Laser and Particle Beams 2022 (March 3, 2022): 1–10. http://dx.doi.org/10.1155/2022/4546178.

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The laser-driven flyer plate is an important loading technology in high energy physics, shock wave physics, and explosive initiation application. How to generate a high-velocity and intact flyer plate by using the laser is a matter of concern for laser driving. In this study, the multilayer flyer plates (MFPs) of Al/Al2O3/Al and TiO2/Al/Al2O3/Al with adjustable performance were designed and fabricated by magnetron sputtering and analyzed by scanning electron microscopy (SEM), laser reflectance spectrometer, and differential thermal analysis (DTA). The effects of the structure and material on t

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Miles, Michael, Biddut Bhattacharjee, Nakul Sridhar, et al. "Flattening of Diluted Species Profile via Passive Geometry in a Microfluidic Device." Micromachines 10, no. 12 (2019): 839. http://dx.doi.org/10.3390/mi10120839.

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In recent years, microfluidic devices have become an important tool for use in lab-on-a-chip processes, including drug screening and delivery, bio-chemical reactions, sample preparation and analysis, chemotaxis, and separations. In many such processes, a flat cross-sectional concentration profile with uniform flow velocity across the channel is desired to achieve controlled and precise solute transport. This is often accommodated by the use of electroosmotic flow, however, it is not an ideal for many applications, particularly biomicrofluidics. Meanwhile, pressure-driven systems generally exhi

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Castañeda, Carlos E., Antonio Valderrabano-Gonzalez, Hossam A. Gabbar, and Onofre A. Morfín. "Sliding Mode with Equivalent Control for Induction Motor Drive Based on Multi-Pulse VSC." Energies 16, no. 13 (2023): 4866. http://dx.doi.org/10.3390/en16134866.

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In this work, the application of a sliding mode equivalent control for an induction motor drive based on a multi-pulse Voltage Source Converter is proposed. This is accomplished by transforming the squirrel-cage induction motor mathematical model into a block control form. The equivalent control method is applied to the sliding manifold, where the voltages are obtained in the stationary reference frame to control the angular velocity of the motor. In addition, a proportional-integral control is designed and applied to the motor represented in this form in order to make performance comparisons

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Yun, Ruide, Yangsheng Zhu, Zhiwei Liu, Jianmei Huang, Xiaojun Yan, and Mingjing Qi. "An Electrostatic Self-Excited Resonator with Pre-Tension/Pre-Compression Constraint for Active Rotation Control." Micromachines 12, no. 6 (2021): 650. http://dx.doi.org/10.3390/mi12060650.

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We report a novel electrostatic self-excited resonator driven by DC voltage that achieves variable velocity-position characteristics via applying the pre-tension/pre-compression constraint. The resonator consists of a simply supported micro-beam, two plate electrodes, and two adjustable constraint bases, and it can be under pre-compression or pre-tension constraint by adjusting the distance L between two constraint bases (when beam length l > L, the resonator is under pre-compression and when l < L, it is under pre-tension). The oscillating velocity of the beam reaches the maximum value

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K. S., Suchithra, Gopalakrishnan E. A., Jürgen Kurths, and E. Surovyatkina. "Emergency rate-driven control for rotor angle instability in power systems." Chaos: An Interdisciplinary Journal of Nonlinear Science 32, no. 6 (2022): 061102. http://dx.doi.org/10.1063/5.0093450.

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Renewable energy sources in modern power systems pose a serious challenge to the power system stability in the presence of stochastic fluctuations. Many efforts have been made to assess power system stability from the viewpoint of the bifurcation theory. However, these studies have not covered the dynamic evolution of renewable energy integrated, non-autonomous power systems. Here, we numerically explore the transition phenomena exhibited by a non-autonomous stochastic bi-stable power system oscillator model. We use additive white Gaussian noise to model the stochasticity in power systems. We

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Zhang, Shuzhong, Su Li, and Tatiana Minav. "Control and Performance Analysis of Variable Speed Pump-Controlled Asymmetric Cylinder Systems under Four-Quadrant Operation." Actuators 9, no. 4 (2020): 123. http://dx.doi.org/10.3390/act9040123.

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Since the energy crisis, the further development of a variable speed pump-controlled hydraulic system driven by an electric machine has attracted increasing attention during the past few years. As a response to this, an innovative double pump-controlled asymmetric cylinder system (DPC) and its control method are proposed in this study. The purpose of this study is to investigate the performance of two variable speed pump-controlled systems for asymmetric cylinders under a four-quadrant operating condition, in comparison with single pump control (SPC). The four-quadrant operating principles of

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Yamafuji, Kazuo, and Tetsuya Komine. "Vibration Control of a Slider Pendulum-Type Loader Arm Driven by a Software-Cam Curve." Journal of Robotics and Mechatronics 1, no. 3 (1989): 173–78. http://dx.doi.org/10.20965/jrm.1989.p0173.

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This paper describes the control methods, computer simulation and experimental results on the vibration control of the loader arm which is composed of a horizontal slider and a pendulum-type arm suspended from it. In order to achieve high-speed driving and accurate positioning of the loader arm without residual vibration, one of the software-cam curves, termed the ""modified sine curve,"" was applied to drive the loader. The cam curve was described numerically on a personal computer. Three control methods together with highgain feedback control are proposed, in which the path and velocity of t

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Plashchansky, L. A., S. N. Reshetnyak, and M. Y. Reshetnyak. "Improvement of the electric energy quality in underground electric networks in highly productive coal mines." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 7, no. 1 (2022): 66–77. http://dx.doi.org/10.17073/2500-0632-2022-1-66-77.

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One of the main factors for the effective functioning of the power supply system in highly productive coal mines is the uninterrupted power supply of underground consumers for the entire process cycle at sufﬁcient amount of electric energy at a high level of quality and performance. The analysis of electric energy consumption in highly productive coal mine has shown that about 57 % of electric energy consumers are located in underground workings. Consumers can be divided into the following areas of basic technological process of coal production: production areas (13 %); conveyor transport area

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Miyake, Tamon, Yo Kobayashi, Masakatsu G. Fujie, and Shigeki Sugano. "One-DOF Wire-Driven Robot Assisting Both Hip and Knee Flexion Motion." Journal of Robotics and Mechatronics 31, no. 1 (2019): 135–42. http://dx.doi.org/10.20965/jrm.2019.p0135.

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Gait assistance robots are used to improve gait performance ability or perform gait motion with an assistance for several articular motions. The sparing use of a gait assistance robot to decrease the duration of the robot’s assistance is important for keeping the ability to perform a movement when the robot assists walking. In previous research, methods of ensuring a compliance mechanism and control method have been studied, and assistance for articular motions has been conducted independently using actuators corresponding to each articular motion. In this paper, we propose a wire-driven gait

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Casas, Laura, José A. Ortega, Aldo Gómez, Juan Escandón, and René O. Vargas. "Analytical Solution of Mixed Electroosmotic/Pressure Driven Flow of Viscoelastic Fluids between a Parallel Flat Plates Micro-Channel: The Maxwell Model Using the Oldroyd and Jaumann Time Derivatives." Micromachines 11, no. 11 (2020): 986. http://dx.doi.org/10.3390/mi11110986.

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In the present work, an analytical approximate solution of mixed electroosmotic/pressure driven flow of viscoelastic fluids between a parallel plates microchannel is reported. Inserting the Oldroyd, Jaumann, or both time derivatives into the Maxwell model, important differences in the velocity profiles were found. The presence of the shear and normal stresses is only close to the wall. This model can be used as a tool to understand the flow behavior of low viscosity fluids, as most of them experiment on translation, deformation and rotation of the flow. For practical applications, the volumetr

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Cardona, Manuel, Cecilia E. García Cena, Fernando Serrano, and Roque Saltaren. "ALICE: Conceptual Development of a Lower Limb Exoskeleton Robot Driven by an On-Board Musculoskeletal Simulator." Sensors 20, no. 3 (2020): 789. http://dx.doi.org/10.3390/s20030789.

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Objective: In this article, we present the conceptual development of a robotics platform, called ALICE (Assistive Lower Limb Controlled Exoskeleton), for kinetic and kinematic gait characterization. The ALICE platform includes a robotics wearable exoskeleton and an on-board muscle driven simulator to estimate the user’s kinetic parameters. Background: Even when the kinematics patterns of the human gait are well studied and reported in the literature, there exists a considerable intra-subject variability in the kinetics of the movements. ALICE aims to be an advanced mechanical sensor that allow

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Kruglov, S. P., S. V. Kovyrshin, and K. F. Kodenev. "Studies of the Identification Control System of an Overhead Crane on its Layout." Mekhatronika, Avtomatizatsiya, Upravlenie 25, no. 12 (2024): 646–55. https://doi.org/10.17587/mau.25.646-655.

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The construction of a control system for a bridge crane operating in conditions of current parametric uncertainty and the impact of external disturbances, in particular, the impact of wind, is considered. The proposed control system is based on a scheme with an algorithm for current parametric identification, assigned an implicit reference model, which expresses requirements for the behavior of the carried load, with formation of a given speed of movement of the bridge crane trolley. The latter corresponds to the use of servo drives on modern cranes, in particular, based on asynchronous electr

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Otsuka, Jiro, and Sadaji Hayama. "Special Issue on Precision and Ultraprecision Positioning." International Journal of Automation Technology 3, no. 3 (2009): 223. http://dx.doi.org/10.20965/ijat.2009.p0223.

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I have been the chairman of the technical committee of ultraprecision positioning at the Japan Society of Precision Engineers (JSPE) from 1993 to 1997. In November 2008, the 3rd International Conference on Positioning Technology (ICPT) was held in Shizuoka, Japan. After the conference I together with Dr. Sadaji Hayama, an adviser of the journal editorial board, asked by mail the most significant presenters and members of the technical committee of ultraprecision positioning if they are willing to contribute their papers for this special issue. As a result, we received more than 20 manuscripts,

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Raksincharoensak, Pongsathorn, Sato Daisuke, and Mathias Lidberg. "Direct Yaw Moment Control for Enhancing Handling Quality of Lightweight Electric Vehicles with Large Load-To-Curb Weight Ratio." Applied Sciences 9, no. 6 (2019): 1151. http://dx.doi.org/10.3390/app9061151.

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In this paper a vehicle dynamics control system is designed to compensate the change in vehicle handling dynamics of lightweight vehicles due to variation in loading conditions and the effectiveness of the proposed design is verified by simulations and an experimental study using a fixed-base driving simulator. Considering the electrification of future mobility, the target vehicle of this research is a lightweight vehicle equipped with in-wheel motors that can generate an additional direct yaw moment by transverse distribution of traction forces to control vehicle yawing as well as side slip m

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Rizzato, Alex, Matteo Bozzato, Giuseppe Zullo, Antonio Paoli, and Giuseppe Marcolin. "Center of Pressure Behavior in Response to Unexpected Base of Support Shifting: A New Objective Tool for Dynamic Balance Assessment." Sensors 23, no. 13 (2023): 6203. http://dx.doi.org/10.3390/s23136203.

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The translation of the base of support represents a promising approach for the objective assessment of dynamic balance control. Therefore, this study aimed to present a servo-controlled, electrically driven movable plate and a new set of parameters based on the center-of-pressure (CoP) trajectory. Twenty subjects were assessed on a force platform screwed over a movable plate that could combine the following settings: direction (forward (FW) and backward (BW)), displacement (25 mm, 50 mm, and 100 mm), and ramp rate (100 mm/s and 200 mm/s). The subjects underwent two sets of 12 trials randomly c

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Kulak, Michal, Maciej Karczewski, Pawel Lesniewicz, et al. "Numerical and experimental analysis of rotating wheel in contact with the ground." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 5 (2018): 1203–17. http://dx.doi.org/10.1108/hff-06-2017-0257.

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Purpose This paper aims to provide the results of investigations concerning an influence of the tyre with longitudinal grooves on the car body aerodynamics. It is considered as an important aspect affecting the vehicle aerodynamic drag. Design/methodology/approach To investigate a contribution of grooved tyres to the overall vehicle drag, three wind tunnel experimental campaigns were performed (two by Peugeot Société Anonyme Peugeot Citroen, one at the Lodz University of Technology). In parallel, computational fluid dynamics (CFD) simulations were conducted with the ANSYS CFX software to enabl

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Brishty, Fahmida Pervin, Ruth Urner, and Gerd Grau. "Machine learning based data driven inkjet printed electronics: jetting prediction for novel inks." Flexible and Printed Electronics 7, no. 1 (2022): 015009. http://dx.doi.org/10.1088/2058-8585/ac5a39.

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Abstract Machine learning (ML) as a predictive methodology can potentially reduce the configuration cost and workload of inkjet printing. Inkjet printing has many advantages for additive manufacturing and printed electronics including low cost, scalability, non-contact printing and on-demand customization. Inkjet generates droplets with a piezoelectric dispenser controlled through frequency, voltage pulse and timing parameters. A major challenge is the design of jettable inks and the rapid optimization of stable jetting conditions whilst preventing common problems (no ejection, perturbation, s

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Boisson, J., R. Monchaux, and S. Aumaître. "Inertial regimes in a curved electromagnetically forced flow." Journal of Fluid Mechanics 813 (January 26, 2017): 860–81. http://dx.doi.org/10.1017/jfm.2016.876.

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We investigated experimentally the flow driven by a Lorentz force induced by an axial magnetic field $\boldsymbol{B}$ and a radial electric current $I$ applied between two fixed concentric copper cylinders. The gap geometry corresponds to a rectangular section with an aspect ratio of $\unicode[STIX]{x1D702}=4$ and we probe the azimuthal and axial velocity profiles of the flow along the vertical axis by using ultrasonic Doppler velocimetry. We have performed several runs at moderate magnetic field strengths, corresponding to moderate Hartmann numbers $M\leqslant 300$. At these forcing parameter

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Kozuka, Hiroaki, Daisaku Uchijima, and Hiroshi Tachiya. "Motion-Assist Arm with a Passive Joint for an Upper Limb." Journal of Robotics and Mechatronics 32, no. 1 (2020): 183–98. http://dx.doi.org/10.20965/jrm.2020.p0183.

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This study proposes a motion-assist arm that can accurately support the positioning of a human upper limb. The motion-assist arm is a three-degree-of-freedom (DOF) planer under-actuated robotic arm with a 1-DOF passive joint that can be driven by an human. A control method for the robot arm is as follows. First, when the human moves an output point of the arm manually, the passive joint is rotated with the movement of the output point. Then, for accurate positioning of the output point on a target path, the actuated joints are controlled according to the displacement of the passive joint. Base

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