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Articles de revues sur le sujet « Optimal torque »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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1

Park, Sumin, Jongwon Kim, and Giuk Lee. "Optimal trajectory planning considering optimal torque distribution of redundantly actuated parallel mechanism." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 23 (2018): 4410–19. http://dx.doi.org/10.1177/0954406217751818.

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Previous studies on the optimal operation planning of redundantly actuated parallel mechanisms have focused on optimal torque distribution for a predefined trajectory. However, the optimized result obtained for a predefined trajectory cannot guarantee an optimal operation plan, because the torque distribution ability of a redundantly actuated parallel mechanism is highly dependent on the shape of the end-effector trajectory. Therefore, we can expect the redundantly actuated parallel mechanism performance to be enhanced when both the trajectory and torque distribution are optimized during the o

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2

Sanjuan De Caro, Javier Dario, Md Samiul Haque Sunny, Elias Muñoz, et al. "Evaluation of Objective Functions for the Optimal Design of an Assistive Robot." Micromachines 13, no. 12 (2022): 2206. http://dx.doi.org/10.3390/mi13122206.

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The number of individuals with upper or lower extremities dysfunction (ULED) has considerably increased in the past few decades, resulting in a high economic burden for their families and society. Individuals with ULEDs require assistive robots to fulfill all their activities of daily living (ADLs). However, a theory for the optimal design of assistive robots that reduces energy consumption while increasing the workspace is unavailable. Thus, this research presents an algorithm for the optimal link length selection of an assistive robot mounted on a wheelchair to minimize the torque demands of

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Li, Junqiu, Yihe Wang, and Yizheng Wang. "Optimal control for jitter suppression of clutch engagement in upshift process of electric vehicles." Advances in Mechanical Engineering 8, no. 12 (2016): 168781401667484. http://dx.doi.org/10.1177/1687814016674847.

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In the shift process of large-order automatic transmission, jitter phenomenon is common in clutch engagement process, which greatly affects the ride comfort of the vehicle. In this article, the jitter dynamic model of clutch engagement process was established with lumped mass method and virtual displacement principle. Specific to clutch engagement stage, the optimal control of the coordination between driving motor and wet clutch was studied. In accordance with the jitter dynamic model, the state–space equation with controlling variables of motor torque and clutch friction torque was establish

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4

Qiu, Lei, Shaopeng Zhu, Dong Liu, Zhiwei Xiang, Hong Fu, and Huipeng Chen. "Research on the Torque Control Strategy of a Distributed 4WD Electric Vehicle Based on Economy and Stability Control." Electronics 11, no. 21 (2022): 3546. http://dx.doi.org/10.3390/electronics11213546.

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To improve the comprehensive performance of the distributed wheel-side four-wheel-drive electric bus, the problem of optimal distribution of the driving torque of the four wheel-side motors is studied. Aiming at the poor economy and failure of switching control due to the consideration of both straight and steering conditions, this paper proposes a fuzzy yaw moment control strategy based on the golden section search algorithm. Under full working conditions, according to the efficiency characteristics of the front and rear axle drive motors, the golden section search algorithm is used to determ

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R.P., Praveen, Ravichandran M.H., V. T. Sadasivan Achari, Jagathy Raj V. P., G. Madhu, and G. R. Bindu. "Design and Analysis of Zero Cogging Brushless DC Motor for Spacecraft Applications." ECTI Transactions on Electrical Engineering, Electronics, and Communications 9, no. 1 (2010): 113–20. http://dx.doi.org/10.37936/ecti-eec.201191.172327.

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This paper presents the optimal design of a surface mounted permanent magnet Brushless DC motor (PMBLDC) meant for spacecraft applications. The spacecraft applications requires the choice of a torques motor with high torque density, minimum cogging torque, better positional stability and high torque to inertia ratio. Performance of two types of machine con¯gurations viz Slotted PMBLDC and Slotless PMBLDC with halbach array are compared with the help of analytical and FE methods. It is found that unlike a Slotted PMBLDC motor, the Slotless type with halbach array develops zero cogging torque wi

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Aoyama, Tadayoshi, Kosuke Sekiyama, Yasuhisa Hasegawa, and Toshio Fukuda. "Optimal Limb Length Ratio of Quadruped Robot Minimising Joint Torque on Slopes." Applied Bionics and Biomechanics 6, no. 3-4 (2009): 259–68. http://dx.doi.org/10.1155/2009/702930.

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This paper aims to determine an optimal structure for a quadruped robot, which will allow the robot’s joint torque sum to be minimised. An animal’s characteristic limb length ratio is a vital part of its overall morphology and the one that enables it to travel easily through its environment. For the same reason, a robot’s structure needs to be suitably designed for locomotion in its working environment. Joint torques are necessary to maintain the posture of the robot and to accelerate joint angles during walking motion, hence, minimisation of joint torques reduces energy consumption. We perfor

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Eisler, G. R., R. D. Robinett, D. J. Segalman, and J. D. Feddema. "Approximate Optimal Trajectories for Flexible-Link Manipulator Slewing Using Recursive Quadratic Programming." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (1993): 405–10. http://dx.doi.org/10.1115/1.2899116.

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The method of recursive quadratic programming, coupled with a homotopy method, has been used to generate approximate minimum-time and minimum tracking-error tip trajectories for two-link flexible manipulator movements in the horizontal plane. The manipulator is modeled with an efficient finite-element scheme for a multi-link, multi-joint system with bending only in the horizontal-plane. Constraints on the trajectory include boundary conditions on link tip position, final joint velocities, accelerations and torque inputs to complete a rest-to-rest maneuver, straight-line tip tracking between bo

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Carignan, C. R., and D. L. Akin. "Optimal Force Distribution for Payload Positioning Using a Planar Dual-Arm Robot." Journal of Dynamic Systems, Measurement, and Control 111, no. 2 (1989): 205–10. http://dx.doi.org/10.1115/1.3153038.

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This paper presents a parameter optimization technique for deciding the force distribution on a payload being transported along a predetermined trajectory using two planar manipulator arms. The methodology begins by transforming the singular dynamics of two-arm transport to an ordinary set of differential equations and then proceeds to obtain a relation between the torques exerted by each arm. This relation is then used in a quadratic torque cost which is subsequently minimized to yield an optimal torque distribution. Significant savings in energy were found to occur when the arms were allowed

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Zhao, Jinyi. "Research on Torque Distribution Strategy for Four-Motor Distributed Drive Vehicles." Applied and Computational Engineering 169, no. 1 (2025): 77–85. https://doi.org/10.54254/2755-2721/2025.ch24658.

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With the global economic development and technological advancement, electric vehicles (EVs) have emerged as a key trend in the automotive industry due to their zero-emission advantage. However, handling stability issues in high-power EVs have become increasingly critical. This study focuses on torque distribution strategies for four-wheel independently driven distributed systems, aiming to enhance vehicle stability and safety by optimizing yaw and sideslip control.A MATLAB simulation model was developed to compare three strategies: no control, average torque distribution, and optimal control.

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Chung, Cheng-Ta, and Hung-Yih Tsai. "Conceptual Design and Energy Efficiency Evaluation for a Novel Torque Vectoring Differential Applied to Front-Wheel-Drive Electric Vehicles." Applied Sciences 13, no. 20 (2023): 11434. http://dx.doi.org/10.3390/app132011434.

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This paper presents a novel differential with lateral torque vectoring activated by an auxiliary motor, called motor-modulated lateral torque vectoring differential, or briefly, MLTD. Its architecture and kinematic characteristics are described, and the optimal cornering performance due to torque vectoring is evaluated using a steady-state vehicle dynamic model. Then, a conceptual design case of MLTD installed in a front-wheel-drive electric vehicle is conducted to assess its feasibility in terms of cornering, driving performances, and energy efficiency performance. The calculations show that

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Jin, Yuan Qiang, and Yu Li Zang. "Optimal Design of Rotation Shaft Torque Testing System." Advanced Materials Research 476-478 (February 2012): 1987–90. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1987.

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Torque measuring in the extra-high rotation speed has not been resolved ideally yet, due to the restriction of the rough conditions. The dynamic characteristics of the developed digital plane grating angular-torquer measuring system are analyzed in this paper. The paper mainly calculates and designs the parameters of elastic shafts with different cross-section. Via the compare of dynamic characteristics and compactness of the elastic shafts with different cross-section, the optimized design is proposed at the end of the paper. The achievements of this paper can supply references to the study a

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Xu, Shijie, Naigang Cui, Youhua Fan, and Yingzi Guan. "A Study on Optimal Compensation Design for Meteorological Satellites in the Presence of Periodic Disturbance." Applied Sciences 8, no. 7 (2018): 1190. http://dx.doi.org/10.3390/app8071190.

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Periodic disturbance may cause serious effects on the attitude of meteorological satellites, and the attenuation of periodic disturbance is required. In this paper, a fundamental study on the optimal design of constant compensations against known-law periodic disturbance for meteorological satellites is investigated. An analytical solution for the relationship between the frequency and amplitude ratios and the response of a typical second-order vibration system is firstly derived. The compensation and disturbance torques are determined according to practical engineering. The criteria for desig

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Zeng, Xiao Hua, Ge Bai, Jin Xin Wang, and Zhen Ping Zhou. "The Instantaneous Optimal Control Strategy of Parallel Hybrid Loader." Applied Mechanics and Materials 380-384 (August 2013): 467–71. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.467.

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In this paper, the instantaneous optimal control strategy of parallel hybrid loader is presented. The aim is to achieve the real time optimal allocation of internal combustion engine (ICE) torque and motor torque in any driving cycle for loader. Thus, all combinations of the ICE torque and the motor torque is determined in any demand torque. Then integrated instantaneous fuel consumption (IIFC) is calculated as a target function, by establishing the equivalent relationship between the electric energy consumption of battery and the fuel consumption, which is converted to the electric energy. Wh

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Ding, Yadong, Yaoyao Wang, Feng Ju, and Bai Chen. "An improved robot trajectory planning method considering torque saturation and modeling errors." Transactions of the Canadian Society for Mechanical Engineering 44, no. 2 (2020): 213–27. http://dx.doi.org/10.1139/tcsme-2019-0007.

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Time-optimal trajectory planning algorithms have been widely adopted to minimize the motion time by exploiting the dynamics and joint allowable torques of a robotic manipulator. However, the actual joint torques may exceed the joint allowable torques because of modelling errors or disturbances in the control system. When the torque limit is added for actuator safety, the controller will have no margin to deal with modeling errors or disturbances, which may lead to large path tracking errors. An on-line trajectory time scaling method called path velocity controller can improve path tracking per

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15

Kumagai, A., D. Kohli, and R. Perez. "Near-Minimum Time Feedback Controller for Manipulators Using On-Line Time Scaling of Trajectories." Journal of Dynamic Systems, Measurement, and Control 118, no. 2 (1996): 300–308. http://dx.doi.org/10.1115/1.2802318.

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A near-minimum time feedback controller for robotic manipulators with bounded input torques is developed. Since the bang-bang input torque obtained from the timeoptimal control theory leaves little or no room for the extra torque of the feedback control action, it is difficult to combine a minimum time open-loop controller with an additional feedback controller. A simple solution to this problem has been to solve the minimum time problem using arbitrarily reduced torque bounds so that a torque head room is created for the feedback control action. Such a scheme, however, wastes considerable inp

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16

Wu, Hao, Wenliang Zhao, Gefei Zhu, and Min Li. "Optimal Design and Control of a Spoke-type IPM Motor with Asymmetric Flux Barriers to Improve Torque Density." Symmetry 14, no. 9 (2022): 1788. http://dx.doi.org/10.3390/sym14091788.

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This paper studies the optimal design and control scheme of a spoke-type interior permanent magnet motor (SIPM). An asymmetric rotor structure with flux barriers is designed to improve the torque density of SIPM. The design method improves the torque density by approximating the maximum value of the magnetic torque and the reluctance torque, wherein the torque components are separated by the frozen permeability method (FPM) to evaluate the contribution. This scheme does not increase the amount of permanent magnets or the motor size, and reduces motor weight while increasing motor torque output

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Pal Singh, Amrinder, Manu Sharma, and Inderdeep Singh. "Optimal control during drilling in GFRP composite laminates." Multidiscipline Modeling in Materials and Structures 10, no. 4 (2014): 611–30. http://dx.doi.org/10.1108/mmms-04-2014-0019.

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Purpose – Damage due to delamination is an important issue during drilling in polymer-matrix composites (PMCs). It depends on thrust force and torque which are functions of feed rate. Transfer function of thrust force with feed rate and torque with feed rate is constructed through experiments. These transfer functions are then combined in state-space to formulate a sixth-order model. Then thrust force and torque are controlled by using optimal controller. The paper aims to discuss these issues. Design/methodology/approach – A glass fiber reinforced plastic composite is drilled at constant feed

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Hong, M., M. Ouyang, and T. Shen. "Torque-based optimal vehicle speed control." International Journal of Automotive Technology 12, no. 1 (2011): 45–49. http://dx.doi.org/10.1007/s12239-011-0006-z.

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19

Zhu, Genghui, Zhenyu Li, Yong Dong, and Quanzhong Liu. "Optimal Design of Torque Converter Blade Angle Based on Surrogate Model Method." Journal of Physics: Conference Series 2463, no. 1 (2023): 012039. http://dx.doi.org/10.1088/1742-6596/2463/1/012039.

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Abstract In this paper, the blade cascade system of the basic torque converter JQB2 is redesigned and changed into a hydraulic torque converter with an adjustable stator. Firstly, the basic torque converter cascade system is modified to realize the adjustable stator. In order to study the influence of the blade angles on the performance of the torque converter, the blade angles were parameterized. Taking the peak efficiency of the torque converter at the design opening as the optimization objection, the pump torque factor is not less than 90% of the initial torque converter as the constraint c

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Choquehuanca, E., and A. Ortega. "A Reinforcement Learning approach to the Optimal Torque MPPT problem in wind turbines." Journal of Physics: Conference Series 2538, no. 1 (2023): 012005. http://dx.doi.org/10.1088/1742-6596/2538/1/012005.

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Abstract In this work, a torque controller for a variable rotational speed wind turbine has been modelled using Reinforcement Learning and considering the Optimal Torque - Maximum Power Point Tracking problem as one of optimization. The reward optimization function is designed as a non-linear function depending mainly on the rotor power variation. Based on this, an optimal action (electromagnetic torque variation) regulates the turbine rotational speed. A simulated 1.5 MW three bladed wind turbine operation is managed by the torque controller. It keeps the turbine working at optimal operationa

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21

Yang, Yuwan, Jin Tong, Yuxiang Huang, Jinguang Li, and Xiaohu Jiang. "Biomimetic Rotary Tillage Blade Design for Reduced Torque and Energy Requirement." Applied Bionics and Biomechanics 2021 (September 28, 2021): 1–16. http://dx.doi.org/10.1155/2021/8573897.

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A rotary cultivator is a primary cultivating machine in many countries. However, it is always challenged by high operating torque and power requirement. To address this issue, biomimetic rotary tillage blades were designed in this study for reduced torque and energy requirement based on the geometric characteristics (GC) of five fore claws of mole rats, including the contour curves of the five claw tips (GC-1) and the structural characteristics of the multiclaw combination (GC-2). Herein, the optimal blade was selected by considering three factors: (1) the ratio ( r ) of claw width to lateral

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Su, Shi Bin, Yi Kai Shi, Kang Han, and Xiao Qing Yuan. "Optimal Design of Transverse Flux Permanent Motor with Reducing Cogging Torque." Applied Mechanics and Materials 385-386 (August 2013): 1197–200. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1197.

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Transverse Flux Permanent-magnet Motor has low speed, high torque density characteristics. In order to reduce cogging torque, a novel topology model of transverse flux motor has been designed for electric vehicle wheel in this paper. Its remarkable characteristic is sufficient to reduce the cogging torque, raise motor output torque and raise utilization ratio to the space in electric vehicle wheel. The cogging torque of the prototype model is calculated through the three dimensional finite element analysis methods. The result shows that the theoretical research method is effective and topology

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Bernat, Jakub, and Sławomir Stępień. "Application of optimal current driver for the torque control of BLDC motor." Archives of Electrical Engineering 60, no. 2 (2011): 149–58. http://dx.doi.org/10.2478/v10171-011-0014-7.

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Application of optimal current driver for the torque control of BLDC motorThis research presents the novel control strategy of the brushless DC motor. The optimal current driver is designed using Linear Quadratic Regulator and feedback linearization. Additionally, the current reshaping strategy is applied to control the motor torque. Thus, the torque controller is built based on the optimal current driver. The motor is simulated using the FEM analysis.

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Mengesha, Samuel, Shailendra Rajput, Simon Lineykin, and Moshe Averbukh. "The Effects of Cogging Torque Reduction in Axial Flux Machines." Micromachines 12, no. 3 (2021): 323. http://dx.doi.org/10.3390/mi12030323.

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An axial flux permanent magnet single-rotor generator has good potential in various applications that require high efficiency, prolonged service life, as well as low mass and dimensions. However, the effect of cogging torque diminishes generator efficiency and flexibility of functionality. The effect of cogging torque arises because of a small air gap between the stator teeth and the rotor. In this article, we suggest that shifting the opposite teeth of the stator to the optimal angle can reduce the effect of cogging torque. A special axial flux permanent magnet generator is developed to choos

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Noble, Sam, and K. Kurien Issac. "An improved formulation for optimizing rocker-bogie suspension rover for climbing steps." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 18 (2019): 6538–58. http://dx.doi.org/10.1177/0954406219863086.

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We address the problem of improving mobility of rovers with rocker-bogie suspension. Friction and torque requirements for climbing a single step were considered as performance parameters. The main contribution of the paper is an improved formulation for rover optimization using smooth functions, which enables use of powerful gradient based nonlinear programming (NLP) solvers for finding solutions. Our formulation does not have certain shortcomings present in some earlier formulations. We first formulate the problem of determining optimal torques to be applied to the wheels to minimize (a) fric

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Cudicio, Alessandro, Eduardo Martinez-Valdes, Marta Cogliati, Claudio Orizio, and Francesco Negro. "The force-generation capacity of the tibialis anterior muscle at different muscle–tendon lengths depends on its motor unit contractile properties." European Journal of Applied Physiology 122, no. 2 (2021): 317–30. http://dx.doi.org/10.1007/s00421-021-04829-8.

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Abstract Purpose Muscle–tendon length can influence central and peripheral motor unit (MU) characteristics, but their interplay is unknown. This study aims to explain the effect of muscle length on MU firing and contractile properties by applying deconvolution of high-density surface EMG (HDEMG), and torque signals on the same MUs followed at different lengths during voluntary contractions. Methods Fourteen participants performed isometric ankle dorsiflexion at 10% and 20% of the maximal voluntary torque (MVC) at short, optimal, and long muscle lengths (90°, 110°, and 130° ankle angles, respec

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Ghosh, Bijoy K., and Bhagya Athukorallage. "Minimum energy optimal external torque control of human binocular vision." Control Theory and Technology 18, no. 4 (2020): 431–58. http://dx.doi.org/10.1007/s11768-020-00015-x.

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AbstractIn this paper, we consider eyes from the human binocular system, that simultaneously gaze on stationary point targets in space, while optimally skipping from one target to the next, by rotating their individual gaze directions. The head is assumed fixed on the torso and the rotating gaze directions of the two eyes are assumed restricted to pass through a point in the visual space. It is further assumed that, individually the rotations of the two eyes satisfy the well known Listing’s law. We formulate and study a combined optimal gaze rotation for the two eyes, by constructing a single

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Wang, Hongyao, Jingbo Wu, Chengwei Xie, and Zhijun Guo. "Vehicle-Mounted SRM DITC Strategy Based on Optimal Switching Angle TSF." World Electric Vehicle Journal 16, no. 1 (2025): 26. https://doi.org/10.3390/wevj16010026.

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Switched reluctance motors (SRMs) offer several advantages, including a magnet- and winding-free rotor, high mechanical strength, and exceptional output efficiency. However, the doubly salient pole structure and high-frequency switching power supply result in significant torque ripple and electromagnetic noise, which limit the application in the field of new energy vehicles. To address these issues, this paper proposes a direct instantaneous torque control (DITC) strategy based on an optimal switching angle torque sharing function (TSF). Firstly, an improved cosine TSF is designed to reasonabl

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Rifqi Zuber Ahmadi, Muhd Zharif, Auzani Jidin, Maaspaliza Azri, Khairi Rahim, and Tole Sutikno. "Improved Torque Control Performance in Direct Torque Control using Optimal Switching Vectors." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (2015): 441. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp441-452.

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This paper presents the significant improvement of Direct Torque Control (DTC) of 3-phases induction machine using a Cascaded H-Bidge Multilevel Inverter (CHMI). The largest torque ripple and variable switching frequency are known as the major problem founded in DTC of induction motor. As a result, it can diminish the performance induction motor control. Therefore, the conventional 2-level inverter has been replaced with CHMI the in order to increase the performance of the motor either in dynamic or steady-state condition. By using the multilevel inverter, it can produce a more selection of th

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Santos, Edward Rainier G., Jonathan N. Sembrano, Benjamin Mueller, and David W. Polly. "Optimizing iliac screw fixation: a biomechanical study on screw length, trajectory, and diameter." Journal of Neurosurgery: Spine 14, no. 2 (2011): 219–25. http://dx.doi.org/10.3171/2010.9.spine10254.

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Object The authors performed a study to determine the optimal iliac screw size, length, and trajectory that produce the highest insertional torques. Methods Ten fresh cadavers were used and 7.5 × 140–mm and 9.5 × 140–mm iliac screws were placed using 3D image guidance in a randomized fashion in 1 of 2 trajectories. The screws were inserted from the posterior superior iliac spine (PSIS) to either 1) supraacetabular bone or 2) the anterior inferior iliac spine (AIIS). Insertional torque was measured for each full revolution, and the concomitant depth for each torque measurement was recorded. Ins

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Xu, Junxin, Chaozhi Huang, Wensheng Cao, and Yuliang Wu. "Torque Ripple Control Strategy of Switched Reluctance Motor Based on BP Neural Network." Journal of Physics: Conference Series 2242, no. 1 (2022): 012036. http://dx.doi.org/10.1088/1742-6596/2242/1/012036.

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Abstract Switched reluctance motor (SRM) has many advantages, but when the motor is running, the fixed turn-on angle will cause the torque ripple of the motor at different speeds and loads. Therefore, an torque ripple control strategy of switched reluctance motor based on BP neural network is proposed. Firstly, the nonlinear relationship among speed, load torque and opening angle is established by using the fitting generalization ability of BP neural network. In this step, the optimal angle data under the minimum pulsation needs to be obtained by simulation. After collecting data, select and c

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Park, Yong-woon, Jae-sub Ko, and Dae-kyong Kim. "Optimal Design of Step-Sloping Notches for Cogging Torque Minimization of Single-Phase BLDC Motors." Energies 14, no. 21 (2021): 7104. http://dx.doi.org/10.3390/en14217104.

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This paper presents a method for reducing the cogging torque for a sloping notch with two notches applied on the stator teeth. The accuracy of FEA was confirmed by a comparison with a previous model using an asymmetric notch for the experiment data and 3D FEA results, followed by a comparison of the cogging torque of a two notches model and a sloping notch model. The sloping notch model was modified to a step-sloping notch model in consideration of a potential manufacturing process. The optimal design for minimizing the cogging torque was developed considering the sloping degree, angle, positi

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Nabilah, Aisyah, Azri Maaspaliza, Jidin Auzani, and Z. Aihsan M. "A new optimal DTC switching strategy for open-end windings induction machine using a dual-inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 3 (2021): 1405–12. https://doi.org/10.11591/ijpeds.v12.i3.pp1405-1412.

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Early in 1980s, fast torque dynamic control has been a subject of research in AC drives. To achieve superior torque dynamic control, two major techniques are used, namely field oriented control (FOC) and direct torque control (DTC), spurred on by rapid advances in embedded computing systems. Both approaches employ the space vector modulation (SVM) technique to perform the voltage source inverter into over modulation region for producing the fastest torque dynamic response. However, the motor current tends to increase beyond its limit (which can damage the power switches) during the torque dyna

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Petukhov, І. S., V. G. Kireyev, K. P. Akinin, and V. A. Lavrinenko. "DECREASING TORQUE RIPPLE OF A SLOTLESS PERMANENT MAGNET TORQUE MOTOR USING A DOUBLE-LAYER WINDING." Tekhnichna Elektrodynamika 2024, no. 4 (2024): 57–62. http://dx.doi.org/10.15407/techned2024.04.057.

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The torque of a magnetoelectric torque motor with surface-mounted permanent magnets on the rotor was studied. The sinusoidal current supply mode is considered. The torque was calculated according to the static model of the magnetic field. It was determined that the sixth harmonic makes a significant contribution to the torque ripple. To reduce the sixth harmonic it is proposed to use a winding with a shortened pitch, for which it is necessary to make this winding in two layers. The optimal values of the number of pole pairs, the angular width of the magnets of the magnetic field exci-tation sy

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Najjari, Behrouz, Mehdi Mirzaei, and Amin Tahouni. "Constrained stability control with optimal power management strategy for in-wheel electric vehicles." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 4 (2019): 1014–32. http://dx.doi.org/10.1177/1464419319856953.

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This paper looks into the energy management and directional stability of four-in-wheel driven electric vehicles, simultaneously. In the proposed strategy, the optimal driving torques are initially distributed between the wheels by considering the condition for minimum losses of motors using the motor efficiency model. In risky maneuvers, a novel optimal torque vectoring system is developed to intentionally change the initial optimal torques for the generation of required stabilizing yaw moment. For designing the stability controller, a new constrained control method is analytically developed b

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Aisyah, Nabilah, Maaspaliza Azri, Auzani Jidin, M. Z. Aihsan, and MHN Talib. "A New Optimal DTC Switching Strategy for Open-End Windings Induction Machine using Dual Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 3 (2021): 1405. http://dx.doi.org/10.11591/ijpeds.v12.i3.pp1405-1412.

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<span>Since the early 1980s, fast torque dynamic control has been a subject of research in AC drives. To achieve superior torque dynamic control, two major techniques are used, namely Field Oriented Control (FOC) and Direct Torque Control (DTC), spurred on by rapid advances in embedded computing systems. Both approaches employ the space vector modulation (SVM) technique to perform the voltage source inverter into over modulation region for producing the fastest torque dynamic response. However, the motor current tends to increase beyond its limit (which can damage the power switches) dur

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Rateb, H. Issa, Sarhan Hussein, and K. Al-Abbas Ibrahim. "Optimization of Electric Passenger Elevator." Journal of Scientific and Engineering Research 8, no. 5 (2021): 43–55. https://doi.org/10.5281/zenodo.10590067.

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<strong>Abstract </strong>Electric passenger elevator is a constant load torque machinery which runs under light loads most time of loading diagram cycle. This will affect the performance of drive system to become inefficient. In this paper to improve the energy efficiency of electric elevator drive system, the optimal closed- loop drive system with load torque (passengers’ number) feed-back signal is proposed. The Genetic Algorithm and Direct Torque Control are implemented as combined searching tool for optimal variables; flux, stator voltage and stator current under different values of

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Svinin, M. M., and M. Uchiyama. "Optimal Geometric Structures of Force/Torque Sensors." International Journal of Robotics Research 14, no. 6 (1995): 560–73. http://dx.doi.org/10.1177/027836499501400603.

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Jovanovic, M. G., and R. E. Betz. "Optimal torque controller for synchronous reluctance motors." IEEE Transactions on Energy Conversion 14, no. 4 (1999): 1088–93. http://dx.doi.org/10.1109/60.815032.

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MURRAY, DAVID A. "Optimal filtering of constant velocity torque data." Medicine & Science in Sports & Exercise 18, no. 6 (1986): 603???611. http://dx.doi.org/10.1249/00005768-198612000-00002.

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Cormerais, H., J. Buisson, P. Y. Richard, J. C. Vannier, and Y. Pichon. "OPTIMAL TORQUE CONTROL OF A SYNCHRONOUS MACHINE." IFAC Proceedings Volumes 35, no. 1 (2002): 347–52. http://dx.doi.org/10.3182/20020721-6-es-1901.01209.

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Chang, R. R. "Optimal design of laminated composite torque wrench." Computers & Structures 79, no. 7 (2001): 703–13. http://dx.doi.org/10.1016/s0045-7949(00)00172-3.

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Bicchi, A., A. Caiti, and D. Prattichizzo. "Optimal Design of Dynamic Force/Torque Sensors." IFAC Proceedings Volumes 30, no. 6 (1997): 1593–98. http://dx.doi.org/10.1016/s1474-6670(17)43588-9.

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Kim, Donghoon, James D. Turner, and Henzeh Leeghim. "Reorientation of Asymmetric Rigid Body Using Two Controls." Mathematical Problems in Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/708935.

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Most spacecrafts are designed to be maneuvered to achieve pointing goals. This is accomplished usually by designing a three-axis control system, which can achieve arbitrary maneuvers, where the goal is to repoint the spacecraft and match a desired angular velocity at the end of the maneuver. New control laws are required, however, if one of the three-axis control actuators fails. This paper explores suboptimal maneuver strategies when only two control torque inputs are available. To handle this underactuated system control problem, the three-axis maneuver strategy is transformed to two success

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Zhang, Qiao, Dongye Sun, and Datong Qin. "Optimal parameters design method for power reflux hydro-mechanical transmission system." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 3 (2018): 585–94. http://dx.doi.org/10.1177/0954407017750502.

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To ensure the starting torque ratio while improving the efficiency of the automatic transmission system, a power reflux hydro-mechanical transmission system which consists of a torque converter, a planetary gear, and two gearboxes is proposed. First, the properties of the speed ratio, torque ratio, efficiency, and capacity in the power reflux hydro-mechanical transmission system are modeled. Then, the non-dominated sorting genetic algorithm II is used to optimize the structural parameter of the planetary gear and the speed ratio of the gearbox T1, with the speed ratio width in the high-efficie

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Leu, M. C., and R. A. Aubrecht. "Feasible and Optimal Designs of Variable Air Gap Torque Motors." Journal of Engineering for Industry 113, no. 2 (1991): 241–45. http://dx.doi.org/10.1115/1.2899686.

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The problems of automating the feasible and optimal designs of variable air gap torque motors are studied. Both are formulated as constrained optimization problems, where equality and inequality constraints are associated with the geometrical and physical characteristics of the device. Numerical results show that feasible designs can be obtained for specified rated torque outputs, and optimal designs can be achieved by reducing the volume or power consumption substantially from the initial designs, without reducing the rated torque output.

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Ul Hassan, Noor, Murat Kilic, Emin Okumus, Bahadir Tunaboylu, and Ali Murat Soydan. "Experimental determination of optimal clamping torque for AB-PEM Fuel cell." Journal of Electrochemical Science and Engineering 6, no. 1 (2016): 9. http://dx.doi.org/10.5599/jese.198.

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<span lang="EN-GB">Polymer electrolyte Membrane (PEM) fuel cell is an electrochemical device producing electricity by the reaction of hydrogen and oxygen without combustion. PEM fuel cell stack is provided with an appropriate clamping torque to prevent leakage of reactant gases and to minimize the contact resistance between gas diffusion media (GDL) and bipolar plates. GDL porous structure and gas permeability is directly affected by the compaction pressure which, consequently, drastically change the fuel cell performance. Various efforts were made to determine the optimal compaction pre

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Shangguan, Jing Shi, and Cheng Zhi Fan. "An Optimal Method for Minimizing Cogging Torque in Disc-Type Permanent Magnet Machines Using FEM and Genetic Algorithm." Applied Mechanics and Materials 416-417 (September 2013): 21–26. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.21.

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Cogging torque is one of the main reasons which cause ripple in motor's speed and torque. So the reduction of cogging torque must be considered in the design of permanent magnet machines. There are many existing techniques for reducing cogging torque in PM machines. This paper presents a new optimal method for cogging torque minimization by magnet shifting in disc-type PM machines. The impact of magnet shifting on cogging torque and torque output are discussed in disc-type PM machines. In order to reduce the cogging torque effectively while without being harmful to the average torque output. T

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Wilkie, Jack, Georg Rauter, and Knut Möller. "Horizontal Test Stand for Bone Screw Insertion." Hardware 2, no. 3 (2024): 223–55. http://dx.doi.org/10.3390/hardware2030011.

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Screws are a versatile method of fixation and are often used in orthopaedic surgery. Various specialised geometries are often used for bone screws to optimise their fixation strengths in limited spaces at the expense of manufacturing costs. Additionally, ongoing research is looking to develop systems/models to automatically optimise bone screw tightening torques. For both applications, it is desirable to have a test rig for inserting screws in a regulated, instrumented, and repeatable manner. This work presents such a test rig primarily used for the validation of optimal torque models; however

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Quamar, Danishtah, and Chiranjit Sarkar. "Optimal Design of Hydraulic Disc Brake for Magnetorheological (MR) Application." Defence Science Journal 72, no. 6 (2022): 783–92. http://dx.doi.org/10.14429/dsj.72.18369.

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This paper aims to provide a new design considering compressive force application in the MR fluid andimprove its braking torque by optimizing it. According to the current study, compressing the MR region will increase braking torque compared to no compression. The area covered by an existing model of the conventional disc brake is taken into consideration for the unique design of the MR brake to operate in shear and compression mode, and the required compression given by the hydraulic pressure similar to a conventional disc brake. The suggested MR brake’s structural layout is presented. The He

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