Relevant bibliographies by topics / Traction torque

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Traction torque'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2023

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Journal articles on the topic "Traction torque"

1

Baek, Seung-Yun, Seung-Min Baek, Hyeon-Ho Jeon, Wan-Soo Kim, Yeon-Soo Kim, Tae-Yong Sim, Kyu-Hong Choi, Soon-Jung Hong, Hyunggun Kim, and Yong-Joo Kim. "Traction Performance Evaluation of the Electric All-Wheel-Drive Tractor." Sensors 22, no. 3 (January 20, 2022): 785. http://dx.doi.org/10.3390/s22030785.

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This study aims to design, develop, and evaluate the traction performance of an electric all-wheel-drive (AWD) tractor based on the power transmission and electric systems. The power transmission system includes the electric motor, helical gear reducer, planetary gear reducer, and tires. The electric system consists of a battery pack and charging system. An engine-generator and charger are installed to supply electric energy in emergency situations. The load measurement system consists of analog (current) and digital (battery voltage and rotational speed of the electric motor) components using a controller area network (CAN) bus. A traction test of the electric AWD tractor was performed towing a test vehicle. The output torques of the tractor motors during the traction test were calculated using the current and torque curves provided by the motor manufacturer. The agricultural work performance is verified by comparing the torque and rpm (T–N) curve of the motor with the reduction ratio applied. The traction is calculated using torque and specifications of the wheel, and traction performance is evaluated using tractive efficiency (TE) and dynamic ratio (DR). The results suggest a direction for the improvement of the electric drive system in agricultural research by comparison with the conventional tractor through the analysis of the agricultural performance and traction performance of the electric AWD tractor.
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Samsonov, V. A., and Yu F. Lachuga. "Optimization of traction characteristics of agricultural tractors." Traktory i sel hozmashiny 84, no. 11 (November 15, 2017): 49–56. http://dx.doi.org/10.17816/0321-4443-66355.

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The productivity of the machine-tractor unit depends on the energy saturation of the tractor. It is assumed that the optimum traction characteristic corresponds to the minimum operating weight of the tractor and its maximum energy saturation, at which the maximum productivity of the machine and tractor unit is achieved with the lowest fuel consumption and compliance with restrictions on tractive effort, slippage and theoretical speed. As a criterion for determining the maximum energy saturation, the maximum efficiency coefficient is adopted with maximum tractive power and maximum tractive efficiency. Calculation of the optimal traction characteristics is an actual task of the theory of the tractor. The purpose of the study is to develop a methodology and algorithms for calculating the indicators of the optimal traction characteristics of the tractor when the engine speed of the crankshaft is changed. The objects of research are wheeled and caterpillar tractors of general purpose. Input data: engine and tractor performance indicators; coefficients that characterize the traction and coupling properties of the tractor; the tractor power balance equation; slipping functions; the dependence of the fuel consumption of the engine and its torque on the speed of the crankshaft. The method of research is the calculation using the basic formulas of the theory of the tractor when the speed of the crankshaft is changed by one rotation. Taking into account the accepted values of the nominal engine speed and the torque adaptive factor, the gear ratio is calculated. The calculation procedure for the optimum traction characteristic is developed for tractors with a minimum operating weight, calculated taking into account the nominal tractive effort and the coefficients of using the gravity of the tractors. The maximum energy saturation for each type and traction class of the tractor is determined by calculating the tractive characteristic of the transmission, at which the maximum efficiency factor, traction power and traction efficiency are reached. The main conclusion: the optimum traction characteristic corresponds to the minimum operating weight of the tractor and its maximum energy saturation.
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Kim, Wan-Soo, Yeon-Soo Kim, and Yong-Joo Kim. "Development of Prediction Model for Axle Torque of Agricultural Tractors." Transactions of the ASABE 63, no. 6 (2020): 1773–86. http://dx.doi.org/10.13031/trans.14012.

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HighlightsA prediction model was developed for estimating the axle torque of an agricultural tractor.The model was developed by complementing and modifying a previously proposed traction equation.Compared to the actual axle torque, the proposed model attained MAPE of 2.1%, RMSE of 29 Nm, and RD of 2.7%.The model predicted axle torque more accurately than the traction force-based prediction model.Abstract. The tractor driving axle torque is an important factor in optimal transmission design and service life evaluation. Axle torque measurement sensor systems are very expensive, and traction force-based axle torque prediction models cannot accurately estimate the axle torque because they do not consider both the conditions of the tractor and the attached implement. Therefore, in this study, a prediction model was developed to estimate the axle torque of an agricultural tractor based on the traction force equation and motion resistance. A load measurement system was established to verify the developed prediction model, and actual field torque data were collected through field tests. The developed prediction model was verified by comparing the results of five reference prediction methods, including weight, engine-rated torque, and three traction equations (Wismer-Luth, ASABE Standard D497.4, and Brixius), using the measured axle torque. Performance evaluation was conducted based on the main variables, including travel speed, tillage depth, and slip ratio. The proposed prediction model was found to be closest to the 1:1 line at all travel speeds, tillage depths, and slip ratios, implying that it can best explain the measured torque values among all prediction models. Compared to the other prediction models, the proposed prediction model’s results under all variable conditions had an R2 of 0.65, MAPE of 2.1%, RMSE of 29 Nm, and RD of 2.7%, indicating excellent prediction of the measured torque. The results show that the developed prediction model can be applied to axle torque prediction by explaining the actual measured axle torque. Keywords: Agricultural tractor, Axle torque, Prediction model, Torque estimation, Traction force.
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Wu, Xiao Yu, Zhe Ming Chen, and Ze Hao Huang. "Analysis and Calculation of Electromagnetic Torque for the Voltage Source Traction Motors." Applied Mechanics and Materials 446-447 (November 2013): 672–77. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.672.

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The traction motor installed on the high-speed train is powered by inverter. A large number of harmonics may appear when motor is operating. Then the motor speed generate oscillation and finally the dynamic characteristic is affected in vehicle system. In this paper, relied on the electromagnetism of traction motor, the mechanism about emerging harmonic torque is analyzed. In addition, based on the equivalent circuit, the method of calculating the parameters in harmonic circuit is proposed. Two mathematical formulas are also proposed to obtain the fundamental electromagnetic torque and the harmonic electromagnetic torque on traction motor. The time domain and frequency domain distributions of the torques are gained and analyzed. Finally a calculation example of traction motor harmonic torque was analyzed and calculated, and prepared for further study of harmonic torque impacting on vehicle system dynamic performance.
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Li, Qingtao, Li Liang, Chao Li, Runtao Li, Chongyong Yan, and Shengzhen Liu. "Characteristic Investigation and Torque Distribution Diagram-Based Computational Method for Continuously Variable Power-Split Transmission." Mathematical Problems in Engineering 2022 (February 28, 2022): 1–15. http://dx.doi.org/10.1155/2022/6136766.

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The key parameter of power-split transmission is the planetary ratio. To obtain various planetary ratios in one transmission system, people use complex systems with multiple planetary gear trains, clutches, and brakes. Another solution is replacing the planetary gear train with a planetary traction drive. However, the participation of the planetary traction drive brings about creep and spin motion, which increase the difficulty of precise calculation. In this study, we investigate the relationships between torques and speeds. Then, we derive the torque and speed distribution formulas that consider the influence of spin torque and creep motion. This study is the first step to precisely calculate the emerging power-split transmission with the planetary traction drive. Based on a contact model and a proposed torque distribution diagram method, this study proposes a fast computational method for calculating the performance of the new continuously variable power-split transmission. The results show that the proposed torque distribution diagram-based computational method is feasible, and the planetary traction drive can be a competitive power-split device for power-split transmission.
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Liu, Jianhua, Rui Nie, and Zheshu Li. "Multimotors Coordination Control Method for Consistent Total Traction Torque of Electric Locomotives." Journal of Advanced Transportation 2020 (September 1, 2020): 1–11. http://dx.doi.org/10.1155/2020/2092463.

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Multimotors traction is a common driving mode for electric locomotives. The complexity and variability of the operating environment often cause difficulties for one or some traction motors to output the distributed traction torque, which requires the redistribution of the torque output of multimotors to maintain the total traction torque of all motors at a given constant. To this end, a multimotors coordination control method was proposed for consistent total traction torque of electric locomotives. Through this approach, a traction torque-coordinated control structure was constructed on the basis of energy minimisation with an optimal dynamic adjustment mode. The sliding mode tracking control was developed for each independent motor to improve its dynamic response performance. A simulation verification of motors fault types in two different cases was conducted. The results showed that the proposed method could track the total traction torque in a short time, and the system fluctuations in independent motor coordination process were very small.
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Geonea, Ionut, Nicolae Dumitru, Alexandru Margine, and Petre Cristian Copilusi. "Experimental Investigations Concerning Friction from Threaded Assemblies." Applied Mechanics and Materials 880 (March 2018): 33–38. http://dx.doi.org/10.4028/www.scientific.net/amm.880.33.

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In this research an experimental test rig and method to measure friction torque from screw-nut assemblies is presented. The experimental test rig uses to measure friction torque an elastic cylinder bush with strain gauge transducers. The frictions torque and the traction force from the threaded assembly are transmitted to the elastic cylinder bush and produce elastic deformations. The elastic cylinder is calibrated in order to establish a correlation between elastic deformation and force of solicitation. In order to measure the experimental data the MGCPlus data acquisition system is used. The experimental results obtained are presented, consisting in the dependence between friction torques and axial traction force occurred in the screw.
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Samsonov, V. A., and Yu F. Lachuga. "Calculation of the parameters of the corrector section of the speed characteristics tractor engine." Traktory i sel hozmashiny 85, no. 5 (October 15, 2018): 20–25. http://dx.doi.org/10.17816/0321-4443-66390.

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One of the main indicators of the corrector section of the high-speed characteristics of the tractor engine is its torque adaptability factor. The article describes the method of General solution of the problem of calculation of this coefficient. The method is to minimize the difference between the two functions (optimality criterion): the first - the dependence of the denominator of the geometric series of gears on the coefficient of adaptability, the second-the dependence of the denominator on the tractor power range, that is, the ratio of the tangential thrust force in the last gear to the same force in the first gear. Taking into account the found coefficient of adaptability by the moment, the rotation frequency of the motor shaft at the maximum torque, the coefficient of adaptability of the engine by the shaft speed, the traction and speed ranges, the theoretical speed in the last gear are determined. The speed of the shaft at the maximum torque is determined from the condition that the engine load factor by power at the maximum torque is equal to 0,85. The power range is determined by the results of minimization of the optimality criterion, the speed range is equal to C-low. The speed of the tractor in the last gear is determined taking into account the given speed in the first gear and the found speed range. The generally accepted range of minimum values of the coefficient of adaptability, based on the time increase in traction resistance, is 1,15...1,20. In some modern tractor engines, this co-efficiency is greater than 1,2. The aim of the article is to optimize the interval of adaptability coefficient values greater than 1,2. The object of study - the engine of a wheeled tractor traction class 3. The initial material-nomi-nal traction and weight of the tractor, its traction range, the interval of theoretical speed in first gear. Research methods-nel programming using the minimization of the convex function; approximation of the linear function of the torque dependence on the current speed of the shaft. The main conclusion: given the accepted criterion of optimality, constraints, and the coefficient of variation moment of resistance of the optimum the coefficient of adaptability at the twisting mo-ment of tractor engines comply with the interval of 1,27 to 1,45.
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Wang, Neng Jian, Li Jie Zhou, Qiang Song, and De Fu Zhang. "Simulation Research on Braking Safety Properties of Aircraft Traction System." Key Engineering Materials 419-420 (October 2009): 705–8. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.705.

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The jack-knifing tendency of aircraft traction system during braking was discussed and analyzed using multi-body dynamics models that consist of aircraft-towing tractor, aircraft draw link and aircraft. The braking critical conditions of the aircraft traction system for straight-line braking and turning braking were discussed and analyzed respectively. In the case of straight-line braking, the effect of friction coefficient on the maximum braking torque is described. In the case of turning braking, the relationship between the maximum baking torque and relative angle is obtained.
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Li, Hao, Zheng He Song, and Bin Xie. "Plowing Performance Simulation and Analysis for Hybrid Electric Tractor." Applied Mechanics and Materials 365-366 (August 2013): 505–11. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.505.

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According to plowing operation characteristics, a case study on a parallel HET (hybrid electric tractor) with the torque combinator is conducted to develop a plowing operation performance simulation system. The mathematical models of drive equilibrium, battery, power combinator and control system are established respectively. A simulation system for evaluating the tractive performance, fuel economy, battery characteristics and controller performance of HET is developed in the environment of MATLAB/Simulink. Simulation results suggest that: in this HET, the output torque and traction vary in a large range with the variations in the operation modes and SOC level of the battery; in the common interval of SOC (0.4~0.7), compared with the traditional tractor, HET can achieve larger output torque with a fuel consumption reduction of 18% ~20% in discharge mode; with the capability of keeping the battery charge-discharge stage stable and guaranteeing the SOC variation in a small range, the controller meets with the requirements of plowing operation and benefits the stability of the tractor power and the extension of battery life cycle.
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Dissertations / Theses on the topic "Traction torque"

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Handoko, Yunendar Aryo, and yunendar@inka web id. "INVESTIGATION OF THE DYNAMICS OF RAILWAY BOGIES SUBJECTED TO TRACTION / BRAKING TORQUE." Central Queensland University. Centre for Railway Engineering, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20070209.101959.

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The limitations of current simulation packages in addressing the true longitudinal behaviour of railway bogie dynamics during braking/traction has prompted the development of a Rail Bogie Dynamics (RBD) program in this thesis. The RBD program offers novel features for the calculation of the speed profile as a function of the brake torque as well as explicitly determining wheelset angular velocity. With such capability, the speed profile is no longer treated as an input calculated as a priori as required by most of the current simulation systems. The RBD program has been developed using a formulation that includes the wheelset pitch degree of freedom explicitly with a coordinate reference system that is fixed in space and time. The formulation has made the simulation of the bogie dynamics during braking/traction possible in a natural way using the brake/traction torque as the input and the resulting speed profile as the output without any need for working out the speed profile as a priori. Consequently, severe dynamics during braking such as the wheelset skid and the onset of wheel climb derailment can be modelled and critical parameters investigated using the RBD program. The RBD program has been validated, where possible, through a series of simulations using a commercial software package (VAMPIRE). For cases which cannot be simulated by VAMPIRE such as the wheelset skid, a novel experimental program has been designed and commissioned in the Heavy Testing Laboratory of the Central Queensland University as reported in this thesis. One of the possible applications of the RBD program in examining the effect of asymmetric brake shoe force in bogies equipped with one-side push brake shoe arrangement is illustrated in this thesis. It is believed that the model and RBD program will have significant benefit in understanding the true longitudinal behaviour of wagons in suburban passenger trains that operate under braking/ traction torques for most of their travel. Similar studies will also be useful to freight train wagon dynamics during entry and exit of speed restriction zones and tight curves.
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Kouns, Heath. "Analysis of Performance Characteristics of Electric Vehicle Traction Drive in Low Speed/Low Torque Range." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/36287.

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In a world with a growing population there is a trend toward higher and higher energy usage. Because of the cost involved in producing extra energy, there is a need for more efficient usage of the energy that is already available. The issue of efficiency rings home especially clear with electric motors. Although induction motors are used in many different applications, the motors used in electric vehicles must be able to generate a large starting torque as well as operate over a wide speed range. This work analyzes the restrictions placed on the motor and inverter drive system. It also looks at the best method for controlling the drive in order to achieve the highest efficiency out of the drive. While other works have shown methods of achieve high efficiency out of the motor, it is the assertion of this work that the efficiency of the total drive is more important. It is to that end that this work analyzes the performance of an induction motor under low torque and speed where a traction drive utilizes the most energy.
Master of Science
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Falbo, Giorgia. "Study of the torque vectoring control problem." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19725/.

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The aim of this thesis is to address the design of a torque vectoring system for an electric All-Wheel-Drive car. The torque vectoring objective is to substitute the need of a mechanical differential in case of an electric car with four individual hub motors. It can be exploited also to perform various forms of electronic stability, such as traction and launch control, improving safety, sports performance and off-road capabilities of vehicles. These technologies involve individual control of each wheel’s drive torque or braking force in response to the dynamics of the driving conditions and the driver’s intentions. This work present a non-linear model derived from a Lagrangian approach to the solution of the control problem, that is then studied at the equilibrium point along a curvilinear trajectory.
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Fiorese, Diego Augusto 1985. "Desenvolvimento e validação de um sistema eletromecânico para determinação do torque nas rodas motrizes de tratores agrícolas /." Botucatu, 2014. http://hdl.handle.net/11449/142950.

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Orientador: Kleber Pereira Lanças
Banca: João Alberto Borges de Araujo
Banca: João Eduardo Guarnetti Santos
Banca: Arno Udo Dallmeyer
Banca: Ila Maria Correa
Resumo: As transmissões dos tratores agrícolas transferem energia do motor para as rodas motrizes, e o torque disponível nos rodados é convertido em tração bruta, que é responsável por vencer a resistência ao rolamento do trator e pela tração disponível (líquida) na barra de tração do trator. Este trabalho teve por objetivo desenvolver um sistema eletromecânico para determinação do torque no eixo das rodas motrizes de tratores agrícolas, denominado torsiômetro, e validá-lo através de ensaios de tração com auxílio de um carro dinamométrico equipado com instrumentação eletrônica para aquisição de dados. A pesquisa foi conduzida no Núcleo de Ensaios de Máquinas e Pneus Agroflorestais (NEMPA) da Faculdade de Ciências Agronômicas (FCA/UNESP), Botucatu-SP. O protótipo foi concebido utilizando programas computacionais específicos para projeto mecânico, e construído para ser instalado no eixo traseiro de tratores agrícolas de até 90 kW. O torsiômetro foi confeccionado com estrutura metálica, apta a resistir a grandes demandas de torque, podendo ser adaptado a qualquer outro trator com características similares, de igual ou menor potência. O dispositivo baseia-se em um braço de alavanca (momento torsor), onde obtém-se os valores de força com uma célula de carga e os valores de torque por uma equação matemática. Após a conclusão do projeto e construção do protótipo, foram realizadas avaliações funcionais e de resistência, e em seguida realizaram-se ensaios de tração em pista, para sua validação. Nos ensaios em pista, foram realizadas as avaliações em duas superfícies (concreto e solo firme), três marchas, oito cargas na barra de tração e com a tração dianteira auxiliar (TDA) ligada e desligada. Os resultados obtidos para validar o equipamento foram analisados estatisticamente através de equações de regressão, com destaque ...
Abstract: The transmissions of agricultural tractors transfer the engine power to the drive wheels and the torque, available in the rotated, is converted into gross traction, which is responsible for overcoming the rolling resistance of the tractor and for the net traction on the drawbar. Based on these premises, this research aims to develop an electromechanical system, which we designate "torque meter" or "torque transducer", to determine the torque and power on the axle of the driving wheels in agricultural tractors, and validate it through traction tests, with the support of a dynamometer car, and electronic instrumentation for data acquisition. The work was conducted at the Agro Forestry Machine and Tire Testing Center (NEMPA) at the College of Agronomic Sciences, São Paulo State University (FCA/UNESP), Botucatu-SP, Brazil. The torque meter was developed using specific software for mechanical design, and was built to be installed on rear axle of tractors of up to 90kW. The equipment was made with robust metal structure, able to withstand high demands of torque, and possible to be adapted to any tractor with similar features with equal or less power, simply by meeting the dimensional peculiarities of each model. The torque meter is based on a lever arm (torsional moment) from which it is obtained the strength values with a load cell and the torque values using a mathematical equation. After completion of the development and construction of the prototype, the functional and resistance evaluations were conducted and followed by dynamic tests for the validation of the torque meter. During traction tests, it was performed evaluations on two surfaces (concrete and firm soil), three gears, up to eight drawbar pull and evaluations with the wheel assist drive on and off. The results for the validation of the equipment were statistically analyzed using regression equations, highlighting the linearity ...
Doutor
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Fiorese, Diego Augusto [UNESP]. "Desenvolvimento e validação de um sistema eletromecânico para determinação do torque nas rodas motrizes de tratores agrícolas." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/142950.

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Made available in DSpace on 2016-08-12T18:48:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-04-28. Added 1 bitstream(s) on 2016-08-12T18:50:50Z : No. of bitstreams: 1 000865107.pdf: 4437907 bytes, checksum: e7ddb13aa3f55f61c8170d212055f16e (MD5)
As transmissões dos tratores agrícolas transferem energia do motor para as rodas motrizes, e o torque disponível nos rodados é convertido em tração bruta, que é responsável por vencer a resistência ao rolamento do trator e pela tração disponível (líquida) na barra de tração do trator. Este trabalho teve por objetivo desenvolver um sistema eletromecânico para determinação do torque no eixo das rodas motrizes de tratores agrícolas, denominado torsiômetro, e validá-lo através de ensaios de tração com auxílio de um carro dinamométrico equipado com instrumentação eletrônica para aquisição de dados. A pesquisa foi conduzida no Núcleo de Ensaios de Máquinas e Pneus Agroflorestais (NEMPA) da Faculdade de Ciências Agronômicas (FCA/UNESP), Botucatu-SP. O protótipo foi concebido utilizando programas computacionais específicos para projeto mecânico, e construído para ser instalado no eixo traseiro de tratores agrícolas de até 90 kW. O torsiômetro foi confeccionado com estrutura metálica, apta a resistir a grandes demandas de torque, podendo ser adaptado a qualquer outro trator com características similares, de igual ou menor potência. O dispositivo baseia-se em um braço de alavanca (momento torsor), onde obtém-se os valores de força com uma célula de carga e os valores de torque por uma equação matemática. Após a conclusão do projeto e construção do protótipo, foram realizadas avaliações funcionais e de resistência, e em seguida realizaram-se ensaios de tração em pista, para sua validação. Nos ensaios em pista, foram realizadas as avaliações em duas superfícies (concreto e solo firme), três marchas, oito cargas na barra de tração e com a tração dianteira auxiliar (TDA) ligada e desligada. Os resultados obtidos para validar o equipamento foram analisados estatisticamente através de equações de regressão, com destaque ...
The transmissions of agricultural tractors transfer the engine power to the drive wheels and the torque, available in the rotated, is converted into gross traction, which is responsible for overcoming the rolling resistance of the tractor and for the net traction on the drawbar. Based on these premises, this research aims to develop an electromechanical system, which we designate torque meter or torque transducer, to determine the torque and power on the axle of the driving wheels in agricultural tractors, and validate it through traction tests, with the support of a dynamometer car, and electronic instrumentation for data acquisition. The work was conducted at the Agro Forestry Machine and Tire Testing Center (NEMPA) at the College of Agronomic Sciences, São Paulo State University (FCA/UNESP), Botucatu-SP, Brazil. The torque meter was developed using specific software for mechanical design, and was built to be installed on rear axle of tractors of up to 90kW. The equipment was made with robust metal structure, able to withstand high demands of torque, and possible to be adapted to any tractor with similar features with equal or less power, simply by meeting the dimensional peculiarities of each model. The torque meter is based on a lever arm (torsional moment) from which it is obtained the strength values with a load cell and the torque values using a mathematical equation. After completion of the development and construction of the prototype, the functional and resistance evaluations were conducted and followed by dynamic tests for the validation of the torque meter. During traction tests, it was performed evaluations on two surfaces (concrete and firm soil), three gears, up to eight drawbar pull and evaluations with the wheel assist drive on and off. The results for the validation of the equipment were statistically analyzed using regression equations, highlighting the linearity ...
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Hu, Zheng [Verfasser]. "Optimization-based robust control for high-performance torque vectoring in electric vehicles operated by induction traction motors / Zheng Hu." Aachen : Shaker, 2017. http://d-nb.info/1138178713/34.

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Saur, Michael [Verfasser]. "Nonlinear Deadbeat-Direct Torque and Flux Control for Highly Saturated Synchronous Reluctance Machines in Automotive Traction Applications / Michael Saur." Aachen : Shaker, 2017. http://d-nb.info/112436546X/34.

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Karlsson, Mattias, and Sebastian Johansson. "Evaluation of Traction Control Systems for an Electric Forklift Truck." Thesis, Linköpings universitet, Fordonssystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176552.

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This thesis evaluates different controllers for traction control on an electric forklift truck and has been done in cooperation with Toyota Material Handling Manufacturing Sweden. The need for a traction control system has increased with the introduction of lithium-ion batteries replacing the older lead-acid batteries, reducing the battery weight and therefore the downward force on the driving wheel increasing the risk for slip. The forklift truck was modelled using Simulink and validated by experiment. Different possible control strategies were investigated and three were chosen for implementation in simulation. These were controllers based on Model Following Control, Maximum Transmissible Torque Estimation and Sliding Mode Control. Model Following Control makes use of a nominal model to compare actual wheel speed values with nominal wheel speed values to determine if slip is occurring, Maximum Transmissible Torque Estimation makes use of a closed-loop disturbance observer to compute the maximum transmissible torque possible without inducing slip and using it as a limitation on the input signal, and Sliding Mode Control uses different functions to \say{slide} along a sliding surface to stay around a specific slip value. All three controller types were developed both as speed controlled and torque controlled. All of the controllers could reduce slip heavily in simulation. The Maximum Transmissible Torque Estimation controller reduced slip the most and kept oscillations at a minimum, but was not as responsive as the others to driver commands. The conclusion was that the controller of choice would depend on the working environment of the forklift truck. In a low friction environment where slip is expected to occur often, the Maximum Transmissible Torque Estimation controller is advisable, while the other two would be a better choice for environment with low slip occurrence. The use of torque control, while often better with regards to decreasing slip, could not be advised due to a perceived increase in implementation cost.
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Михайлиця, Павло Романович, and Pavlo Romanovych Mykhailytsia. "Проект дільниці ремонтного цеху для технічного обслуговування та ремонту трансмісії легкового автомобіля Skoda Octavia з дослідженням тягово-швидкісних характеристик гідротрансформатора." Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2020. http://elartu.tntu.edu.ua/handle/lib/33536.

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Роботу виконано на кафедрі автомобілів Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України. Захист відбудеться 23 грудня 2020 р. о 11:00 годині на засіданні екзаменаційної комісії № 10 у Тернопільському національному технічному університеті імені Івана Пулюя за адресою: 46001, м. Тернопіль, вул. Текстильна, 28, навчальний корпус № 9, ауд. 106.
В кваліфікаційній роботі розроблено технологію технічного обслуговування та ремонту трансмісії легкового автомобіля Skoda Octavia, а також досліджено тягово-швидкісних характеристик гідротрансформатора.
The qualification work developed the technology of maintenance and repair of the transmission of the car Skoda Octavia, as well as the traction and high-speed characteristics of the hydraulic transformer were investigated.
ВСТУП……………………………………………………………..…………… 1 ЗАГАЛЬНО-ТЕХНІЧНИЙ РОЗДІЛ ……………………………..……….. 1.1 Огляд та аналіз трансмісій сучасних автомобілів 1.2 Характеристика та конструктивні особливості автомобілів Skoda Octavia 1.3 Діагностика, неполадки та обслуговування трансмісії передньоприводного автомобіля 1.4 Постановка завдання 2 ТЕХНОЛОГІЧНИЙ РОЗДІЛ........................................................................ 2.1 Процес демонтажу трансмісії передньоприводного автомобіля 2.2 Розрахунок виробничої програми 2.3 Розрахунок кількості робітників та пропозиція обладнання 3 КОНСТРУКТОРСЬКИЙ РОЗДІЛ ……………………………………..…. 3.1 Попередній розрахунок зчеплення 3.2 Попередній розрахунок коробки передач. Визначення діапазону передаточних чисел 4 НАУКОВО-ДОСЛІДНИЙ РОЗДІЛ……………..………………… ……. 4.1 Дослідження тягово-швидкісних властивостей 4.2 Розрахунок та аналіз ефективної потужності двигуна 4.3 Розрахунок і уточнення передаточних чисел трансмісії 4.4 Основні критерії тягово-швидкісних властивостей 5 ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ ……………………………………………………………….… 5.1 Розрахунок освітлення 5.2 Нормування захисту від випромінювань ЗАГАЛЬНІ ВИСНОВКИ …………………………………………………… БІБЛІОГРАФІЯ ……………….……..…………………………..………..… ДОДАТКИ
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Villella, Matthew G. "Nonlinear Modeling and Control of Automobiles with Dynamic Wheel-Road Friction and Wheel Torque Inputs." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5198.

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This thesis presents a new nonlinear automobile dynamical model and investigates the possibility of automobile dynamic control with wheel torque utilizing this model. The model has been developed from first principles by applying classical mechanics. Inputs to the model are the four independent wheel torques, while the steer angles at each wheel are specified as independent time-varying signals. In this way, consideration of a variety of steering system architectures, including rear-wheel steer, is possible, and steering introduces time-varying structure into the vehicle model. The frictional contact at the wheel-road interface is modeled by use of the LuGre dynamic friction model. Extensions to the existing two-dimensional LuGre friction model are derived and the steady-state of the friction model is compared to existing static friction models. Simulation results are presented to validate the model mathematics and to explore automobile behavior in a variety of scenarios. Vehicle control with wheel torque is explored using the theory of input-output linearization for multi-input multi-output systems. System relative degree is analyzed and use of steady-state LuGre friction in a control design model is shown to give rise to relative degree singularities when no wheel slip occurs. Dynamic LuGre friction does not cause such singularities, but instead has an ill-defined nature under the same no-slip condition. A method for treating this ill-defined condition is developed, leading to the potential for the system to have relative degree. Longitudinal velocity control and combined longitudinal and angular vehicle velocity control are demonstrated in simulation using input-output linearization, and are shown to produce improved vehicle response as compared to the open-loop behavior of the automobile. Robustness of the longitudinal velocity control to friction model parameter variation is explored and little impact to the controller's ability to track the desired trajectory is observed.
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Books on the topic "Traction torque"

1

Mysłowski, Janusz. Moment obrotowy trakcyjnego silnika z zapłonem samoczynnym. Szczecin: Wydawn. Uczelniane Politechniki Szczecińskiej, 1989.

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Roger Welsch, busted tractors and rusty knuckles: Norwegian torque wrench techniques and other fine points of tractor restoration. Osceola, WI. USA: Motorbooks International, 1997.

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Tractor Trilogy: Busted Tractors, Old Knuckles, Sex, Norwegian Torque Wrench Techniques. Motorbooks International, 2003.

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Welsch, Roger. Busted Tractors and Rusty Knuckles: Norwegian Torque Wrench Techniques and Other Fine Points of Tractor Restoration. MBI, 1997.

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Book chapters on the topic "Traction torque"

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Zhang, Guoqiang, Gaolin Wang, Nannan Zhao, and Dianguo Xu. "Fuzzy Self-tuning Torque Control Strategy." In Permanent Magnet Synchronous Motor Drives for Gearless Traction Elevators, 105–21. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9318-2_6.

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Zhang, Guoqiang, Gaolin Wang, Nannan Zhao, and Dianguo Xu. "Starting Torque Control Based on Dichotomy and Staircase Methods." In Permanent Magnet Synchronous Motor Drives for Gearless Traction Elevators, 89–103. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9318-2_5.

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Zhang, Guoqiang, Gaolin Wang, Nannan Zhao, and Dianguo Xu. "Starting Torque Control Strategy Based on Offset-Free Model Predictive Control Theory." In Permanent Magnet Synchronous Motor Drives for Gearless Traction Elevators, 123–40. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9318-2_7.

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Zhang, Zhiqiang, Jinghai Jiao, Xinying Zhao, Fei Lin, and Zhongping Yang. "Dead-Time Effect on Traction Motor Torque Pulsation of High-Speed Train." In Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation, 267–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49367-0_28.

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Kim, Young-Choon, Moon-Taek Cho, and Ho-Bin Song. "A Study on Brake Torque for Traction Motors by Using the Electric Brake." In Lecture Notes in Electrical Engineering, 1331–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41674-3_184.

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Kim, Young-Choon, Moon-Taek Cho, and Ho-Bin Song. "A Study on Brake Torque for Traction Motors by Using the Electric Brake." In Lecture Notes in Electrical Engineering, 503–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41674-3_71.

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Mendonça, Paulo, and Duarte M. Sousa. "Scalar Variable Speed Motor Control for Traction Systems with Torque and Field Orientation Filter." In Technological Innovation for Cyber-Physical Systems, 226–34. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31165-4_23.

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Tung, Nguyen Thanh, and Luong Van Van. "A Study on the Effects of Braking Torque on Dynamic Load of Tractor Semi-trailer on a Round Road with the Maximum Longitudinal Friction Coefficient φxmax = 0.6." In Lecture Notes in Mechanical Engineering, 180–86. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99666-6_28.

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Tojiddin Khayrullaevich, Juraev, Norov Sobirjon Negmurodovich, and Musulmanov Furqat Shodiyevich. "Study of the Parameters of the Planner with a Screw Working Body." In Direct Torque Control Strategies of Electrical Machines [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93308.

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This chapter examined the theoretical background of the use of a screw working body in front of the planner bucket and conducting experiments in laboratory conditions with the proposed working body. This work supports the practical solution of using a screw working particle in the current field planning. Significance of the work reducing traction resistance to soil movement up to 20% enables the tractor unit to work at higher speeds of translational motion; the latter contributes to increased productivity, improved planning quality and reduced cash costs per unit of work performed. The chapter was prepared under results of research in the Mechanics Laboratory of Bukhara Engineering Technological Institute.
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Hassan, Ahmed, Jose Frejo, and Jose Maestre. "Enhancement handling performance of 4-wheels drive electrical vehicle using advanced control technique." In XLIII Jornadas de Automática: libro de actas: 7, 8 y 9 de septiembre de 2022, Logroño (La Rioja), 530–36. 2022nd ed. Servizo de Publicacións da UDC, 2022. http://dx.doi.org/10.17979/spudc.9788497498418.0530.

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Electric vehicles (EVs) are gaining attention because they are environmentally friendly. Also, EVs can use in-hub motors, which can be independently controlled, improving maneuverability and allowing to set more ambitious control goals. In this paper, the lateral motion of an EV is controlled using the direct yaw control (DYC) method. The proposed controller uses the yaw moment produced by the longitudinal forces of the tires to stabilize the vehicle motion during critical cornering conditions to improve vehicle handling characteristics. The designed controllers, based on a linear model of the vehicle compute the optimal coupled traction/braking torque of the four in-wheel motors. By using unequal torque distribution, a restoring yaw moment can be generated in order to improve vehicle stability. Two controllers (PID and MPC) were designed to generate the moment required to achieve vehicle stability . The MPC outperforms PID regarding reduction of side slip angle and yaw rate.
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Conference papers on the topic "Traction torque"

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Michael Heaney, Francis, Matthew L. Lee, and Sudhir Gupta. "New Torque Balancing Algorithm Improves Pulling Force and Speed With Wireline Electro-Mechanical Tractor." In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209010-ms.

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Abstract The electro-mechanical eline tractor introduced in 2019 (Lee et al. 2019) has completed over 120 jobs. As discussed in the paper, one of the unique technology drivers was high tractoring speed to improve intervention efficiency. The tractor has several runs where the average rate exceeded 100 feet per minute and one job at 115 feet per minute over a 2900 ft lateral section. An additional attribute was the surface readout (SRO) telemetry and sensor data that proved invaluable in assessing tool performance, and specifically downhole tractor traction. Initial deployment of the electro-hydraulic eline tractor uses an active traction control system primarily based on wheel speed. During the evaluation of the SRO data, including wheel torque, wheel speed, downhole tension, relative bearing, inclination, and CCL, it was apparent that the variance in the wheel torques values was higher on longer lateral sections expected. This inconsistency in torque was unexpected and suggested possible wheel slippage. The CCL helped confirm that the tractor wasn't traveling the expected distance between casing joints and supported a wheel slippage scenario. Interestingly, monitoring the winch operation and reducing the hold back line tension, muted wheel slippage on several runs. Unfortunately, it was not a consistent control as it was both well trajectory and winch operator dependent. Even a qualified winch operator's attention to detail can wane on long lateral sections, which can cause wheel slip. Noting the ladder would be a challenging key performance measurement to accurately control an engineered solution was developed to improve tractor traction. Armed with a large sensor data suite from previous runs, engineers adopted a completely new active feedback traction control system. The new philosophy undertaken provides a weighting measure for wheel speed and torque, downhole tension, and the electrical power drawn by each tractor section. The DC motors used on the electro-mechanical tractor have individual programmable high-speed motor controllers allowing for a precise feedback loop called"GripPro." Test track results showed this new traction algorithm not only minimized wheel slippage but improved the power-sharing equalization, which allowed for continuous downhole tractor force to be increased by 25%. SRO field data highlighted a much smoother deployment with both speed and torque laying over on all wheels and no large power swings when the tractor encountered sections of increased downhole force due to a dog leg change. On the longer laterals, the symmetry of speed & torque allowed the tractor to travel without increased power demands and offered a satisfactory deployment even when the winch operator wasn't consistent while running in the lateral section.
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Kolosiuk, V. P., O. I. Hubachov, N. N. Thibulnik, A. V. Kolosiuk, and B. V. Bolibrukh. "The Torque of Undulated-Current Traction Motors." In 2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES). IEEE, 2019. http://dx.doi.org/10.1109/mees.2019.8896659.

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Lee, Jin-Kyu, Ji-Won Kim, and Byoung-gun Park. "Fast Anti-Slip Traction Control for Electric Vehicles Based on Direct Torque Control with Load Torque Observer of Traction Motor." In 2021 IEEE Transportation Electrification Conference & Expo (ITEC). IEEE, 2021. http://dx.doi.org/10.1109/itec51675.2021.9490107.

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Aguirre, Maitane, Javier Poza, Leire Aldasoro, and Txomin Nieva. "Sensorless torque control of PMSMs for railway traction applications." In 2013 15th European Conference on Power Electronics and Applications (EPE). IEEE, 2013. http://dx.doi.org/10.1109/epe.2013.6634615.

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Tarte, Shrinivas. "Design And Analysis of Light Weight Helical Gear Limited Slip Differential For Racing Car Applications." In FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2020-mml-047.

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The purpose of this paper is to study and designing of light weight limited Slip Differential. The LSD is transmission device that improves traction capabilities leading to high performance road cars, racing cars. Concentrating on the ability of Helical gear limited slip differential to adapt to different cornering conditions, we designed light weight differential for achieving better performance in racing cars. For the designing purpose mathematical equations were used. All the parts of differential are design under static condition and modelled. Design was then iterated to give various models and analysis was carried out on each design for the improvement. Testing of this differential is then carried out on a Formula SAE car in order to verify the performance of differential. This paper considers use of differential in Formula SAE or similar auto racing competition. Casing of differential that is designed consist of 2 parts left hand casing and right hand casing, Left hand casing gives support to 3 planetary gears which is in mesh with left sun gear. Right hand casing gives support to all planetary gears and right sun gear along with star idler. The planetary gears of left and right casing are in mesh. On extension of both casing there is provision for taper roller bearing mount. Differential is provided with mounting of sprocket. Differential is a device that differentiates or splits the engine torque and allow both drive wheels to rotate at different speed hence the name differential. Commonly used differential (open differential) allows each of driving wheels to rotate at different speed when each wheels travels different distance through the turn. But it splits the torque equally between both the drive wheels. When one of the drive wheel looses traction due to slippery condition or cornering neither of the wheel gets torque for the propulsion of vehicle. the maximum torque that can be supplied by the engine to the wheels is limited by the traction capabilities of the tire. Since the torque is distributed equally between both wheels, the maximum total torque transferred to the ground is twice the maximum torque available at the tire with the least traction. This is a major disadvantage for low traction situation such as on off-road terrain, or in cases of large weight transfer like that occurring during racing. During tight cornering weight is transferred from the vehicles inside wheels to the outside ones. The open differential will lead to slipping of the inside wheel thus decreasing the rate of acceleration out of a corner. To overcome this problem Limited slip differential is used. As it differentiates torque and speed, it improves cornering stability and better traction control with direct impact on handling characteristic of car. In the racing application due to cornering condition, leading to weight transfer on wheels hence there are different traction load on different wheel. Also inertia and weight plays an important role in overall performance of a car. Hence LSD is used which fulfil the needs of different tractional load requirement by differentiating torque.
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Cantegrel, M., F. Gillon, and S. Brisset. "Fast computation of ripple torque for PM synchronous traction machines." In 2012 XXth International Conference on Electrical Machines (ICEM). IEEE, 2012. http://dx.doi.org/10.1109/icelmach.2012.6349875.

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Smolin, Viktor, Irina Topolskaya, and Sergey P. Gladyshev. "Energy Method for Torque Control of a Synchronous Traction Motor." In WCX World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2018. http://dx.doi.org/10.4271/2018-01-0766.

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Abouzeid, Ahmed Fathy, Juan Manuel Guerrero, Iker Muniategui, Aitor Endemano, David Ortega, and Fernando Briz. "Torque Dynamics Enhancement of Railway Traction Drives Using Scalar Control." In 2021 IEEE International Electric Machines & Drives Conference (IEMDC). IEEE, 2021. http://dx.doi.org/10.1109/iemdc47953.2021.9449495.

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Ciszak, Robert J., Ekkehard Pittius, and Jarek Rosinski. "Torque Spike Analysis of an AC Haul Truck Traction System." In International Off-Highway & Powerplant Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-2627.

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Zhang, Yonggao, Xiong Jian, Li Cai, and Liu Ni. "Sliding Mode Control Design in Traction Motor Direct Torque Control." In 2016 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2016. http://dx.doi.org/10.1109/vppc.2016.7791777.

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Reports on the topic "Traction torque"

1

Drive modelling and performance estimation of IPM motor using SVPWM and Six-step Control Strategy. SAE International, April 2021. http://dx.doi.org/10.4271/2021-01-0775.

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This paper presents a comprehensive evaluation of the performance of an interior permanent magnet (IPM) traction motor drive, and analyses the impact of different modulation techniques. The most widely used modulation methods in traction motor drives are Space vector modulation (SVPWM), over-modulation, and six-step modulation have been implemented. A two-dimensional electromagnetic finite element model of the motor is co-simulated with a dynamic model of a field-oriented control (FOC) circuit. For accurate tuning of the current controllers, extended complex vector synchronous frame current regulators are employed. The DC-link voltage utilization, harmonics in the output waveforms, torque ripple, iron losses, and AC copper losses are calculated and compared with sinusoidal excitation. Overall, it is concluded that the selection of modulation technique is related to the operating condition and motor speed, and a smooth transition between different modulation techniques is essential to achieve a better performance.
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