scholarly journals Load torque control of an electromagnetic motor with a reduction gear and motor/load‐side encoders using a spring model including a dead zone

2021 ◽  
Vol 214 (4) ◽  
Author(s):  
Daichi Kondo ◽  
Daisuke Yashiro ◽  
Kazuhiro Yubai ◽  
Satoshi Komada
Keyword(s):  
Dead Zone ◽  
Torque Control ◽  
Reduction Gear ◽  
Spring Model ◽  
Load Torque ◽  
Motor Load

Design of Load Torque Controler Using Motor/Load-side Encoders for Electromagnetic Motor With Reduction Gear

2020 ◽  
Vol 2020 (0) ◽  
pp. 1P1-H02
Author(s):  
Daichi KONDO ◽  
Daisuke YASHIRO ◽  
Kazuhiro YUBAI ◽  
Satoshi KOMADA
Keyword(s):  
Reduction Gear ◽  
Load Torque ◽  
Motor Load

scholarly journals Sensorless Pedalling Torque Estimation Based on Motor Load Torque Observation for Electrically Assisted Bicycles

Actuators ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 88
Author(s):  
Riccardo Mandriota ◽  
Stefano Fabbri ◽  
Matthias Nienhaus ◽  
Emanuele Grasso
Keyword(s):  
External Disturbance ◽  
State Observer ◽  
Position Estimation ◽  
Load Torque ◽  
Estimation Errors ◽  
Position Information ◽  
Longitudinal Dynamics ◽  
Rotor Position ◽  
Electrically Assisted ◽  
Motor Load

The need for reducing the cost of and space in Electrically Assisted Bicycles (EABs) has led the research to the development of solutions able to sense the applied pedalling torque and to provide a suitable electrical assistance avoiding the installation of torque sensors. Among these approaches, this paper proposes a novel method for the estimation of the pedalling torque starting from an estimation of the motor load torque given by a Load Torque Observer (LTO) and evaluating the environmental disturbances that act on the vehicle longitudinal dynamics. Moreover, this work shows the robustness of this approach to rotor position estimation errors introduced when sensorless techniques are used to control the motor. Therefore, this method allows removing also position sensors leading to an additional cost and space reduction. After a mathematical description of the vehicle longitudinal dynamics, this work proposes a state observer capable of estimating the applied pedalling torque. The theory is validated by means of experimental results performed on a bicycle under different conditions and exploiting the Direct Flux Control (DFC) sensorless technique to obtain the rotor position information. Afterwards, the identification of the system parameters together with the tuning of the control system and of the LTO required for the validation of the proposed theory are thoroughly described. Finally, the capabilities of the state observer of estimating an applied pedalling torque and of recognizing the application of external disturbance torques to the motor is verified.

Research in Hot-Rolling Downcoiler Dynamic Torque Control

2012 ◽  
Vol 572 ◽  
pp. 72-77
Author(s):  
Qiang Guo ◽  
Xiao Jun Hu ◽  
Zhen Yong Zheng
Keyword(s):  
Temperature Change ◽  
Yield Point ◽  
Hot Rolling ◽  
Steel Strip ◽  
Large Change ◽  
Torque Control ◽  
Coiling Temperature ◽  
Load Torque ◽  
Steel Coil ◽  
Hot Strip

Torque control of hot strip coiler affects the telescopicity of steel coil. The hot yield point of steel is different in different temperature, it affects the bending torque of steel strip, the strip coiling temperature is about 500-700,and what obtained through the study of steel hot yield point is that large change of hot yield point happens in every 50 degrees of temperature change. In order to track the load torque accurately, compensation of torque for temperature change is necessary. It can make torque tracking accurately, and improve the telescopicity of steel coil.

Locomotive wheel slip detection based on multi-rate state identification of motor load torque

2016 ◽  
Vol 353 (2) ◽  
pp. 521-540 ◽  
Author(s):  
Song Wang ◽  
Jian Xiao ◽  
Jingchun Huang ◽  
Hanmin Sheng
Keyword(s):  
Wheel Slip ◽  
Load Torque ◽  
State Identification ◽  
Motor Load ◽  
Slip Detection

A High Accuracy Speed Control of DC Motor Using Adaptive Torque Compensation on Lyapunov Stability with Kalman Filter

2016 ◽  
Vol 835 ◽  
pp. 673-680
Author(s):  
Chermdhong Prattanaruk ◽  
J. Srisertpol
Keyword(s):  
Kalman Filter ◽  
Control System ◽  
Lyapunov Stability ◽  
Speed Control ◽  
Dc Motor ◽  
High Accuracy ◽  
Torque Control ◽  
Motor Speed ◽  
Load Torque ◽  
Accuracy Speed

The speed control system of DC motor normally uses increasing of electric current and voltage for obtaining required speed and torque with regardless of effects from variable of load torque to system. Including that noise will make some errors in speed and torque control. This research aims to present a method for developing the high accuracy in speed control of DC motor by a technique of adaptive torque compensation that is evolved on Lyapunov stability and using Kalman filter for screening out the evident noises in the system. Results reveals that the adaptive torque compensator evolved from the Lyapunov stability can compensate a stable torque and when it is worked with Kalman filter, it can compensate torque correctly and can control more accuracy of motor speed.

scholarly journals Backlash Fault Suppression Using LQ Optimal Control Based RST Controllers in Wind Turbine Systems Using Bond Graphs and Matlab/Simulink

2021 ◽  
Vol 15 (3) ◽  
pp. 154-163
Author(s):  
Mohamed Arab ◽  
Abederezak Lachouri ◽  
Mohamed Kerikeb ◽  
Lamine Mehennaoui ◽  
Faouzi Bouchareb
Keyword(s):  
Optimal Control ◽  
Wind Turbine ◽  
Dynamic Behaviour ◽  
Control Structure ◽  
Dead Zone ◽  
Torque Control ◽  
Bond Graphs ◽  
Actual System ◽  
Wind Turbine System ◽  
Lq Optimal Control

Abstract The presence of backlash in wind turbines is a source of limitations as it introduces nonlinearities that reduce their efficiency in speed/torque control which affect the performance of the power quality. Because of production tolerances during rotation, the teeth contact is lost for a small angle; until it is re-established, it produces a backlash phenomenon. The desire to eliminate this phenomenon is often hard to realise due to the nonlinear dynamic behaviour, which arises with the presence of backlash fault in a system. Therefore, the goal of this study is to develop an LQ optimal control structure in a form of an R-S-T controller in order to reduce the disturbing torque transmitted inside the dead zone of a gearbox in the wind turbine system. The actual system is also developed to be used as a demonstration model at lectures or presentations. The efficacy of the proposed control is illustrated via simulations.

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