Related Experiment Video
Updated: Mar 22, 2026

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
Published on: June 13, 2022
An Online Observer for Minimization of Pulsating Torque in SMPM Motors
Lucian Roșca1, Mihai Duguleană2
1Faculty of Engineering, University "Lucian Blaga" of Sibiu, Sibiu, Romania.
Abstract:
A persistent problem of surface mounted permanent magnet (SMPM) motors is the non-uniformity of the developed torque. Either the motor design or the motor control needs to be improved in order to minimize the periodic disturbances. This paper proposes a new control technique for reducing periodic disturbances in permanent magnet (PM) electro-mechanical actuators, by advancing a new observer/estimator paradigm. A recursive estimation algorithm is implemented for online control. The compensating signal is identified and added as feedback to the control signal of the servo motor. Compensation is evaluated for different values of the input signal, to show robustness of the proposed method.
Related Concept Videos
Angle of Twist: Problem Solving
Transmission Shafts: Problem Solving
Next, use bending moment diagrams for the shaft to...
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Time-Domain Interpretation of PD Control
Consider the example of control of motor torque. Initially, a positive...
Electro-mechanical Systems
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Net Torque Calculations

