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Speed Sensorless Fault Tolerant Control for DC Servo Motor with Current Sensor Fault

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This paper discusses the application of a fault tolerant control scheme in sensorless speed control for dc motors. The sensorless speed system works by estimating the speed using the current measurement value. The novelty of the proposed scheme is a speed estimator capable of accommodating current sensor faults, which is the only measurement information. The technique used is a modification of the Extended State Observer (ESO) where the residual is not only used to estimate the state, but also to estimate the load torque. In this case, the load torque is treated as a changing input parameter and it is estimated using the observer's normal approach. The modified ESO estimation result is in the form of speed and current estimate, and then fed to the state feedback control with the integrator in order to maintain the speed at the setpoint value. In order to test the proposed control system, numerical simulations are carried out and comparisons are made between the control system with ESO and with modified ESO. From the results of this simulation experiment, the conclusion is that the modified ESO control system is proven to be able to overcome changes in load torque and setpoint as well as sensor faults that occur.
Copyright © 2022 The Authors - Published by Praise Worthy Prize under the CC BY-NC-ND license.


Sensorless; Motor Servo; Extended State; Observer; Fault Detection; Technological Capabilities

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P. C. Sen, Electric motor drives and control-past, present, and future, IEEE Transactions on Industrial Electronics, vol. 37 (Issue 6):562-575, Dec. 1990.

B. K. Bose, Power Electronics and Motor Drives: Advances and Trend (Academic Press, 2006).

Mohan H, Pathak MK, Dwivedi SK, Sensorless control of electric drives a technological review, IETE Tech Rev., Vol. 37 (Issue 5):504-528, 2020.

Chaiyot, R., Kinnares, V., Sensorless Speed Vector Control Based on MRAS of Asymmetrical Two-Phase Induction Motor, (2020) International Review of Electrical Engineering (IREE), 15 (2), pp. 134-146.

El Daoudi, S., Lazrak, L., Benzazah, C., Ait Lafkih, M., An Improved Sensorless DTC Technique for Two/Three-Level Inverter Fed Asynchronous Motor, (2019) International Review on Modelling and Simulations (IREMOS), 12 (5), pp. 322-334.

Noori, O., Mustafa, M., Compressed Extended Kalman Filter for Sensorless Control of Asynchronous Motor, (2020) International Journal on Energy Conversion (IRECON), 8 (6), pp. 200-211.

Wang Q, Wang S, Chen C, Review of sensorless control techniques for PMSM drives, IEEJ Trans Electr Electron Eng., Vol. 14 (Issue 10):1543-1552, 2019.

S.M. Krishna and J.L.F Daya, A modified disturbance rejection mechanism in sliding mode state observer for sensorless induction motor drive, Arab J SciEng. Vol. 41:3571-3586, 2016.

X. Sun , Y. Zhang , X. Tian, Speed sensorless control for IPMSMs using a modified MRAS with grey wolf optimization algorithm, IEEE Trans Transp Electrification, 2021.

J. B. Park and X. Wang, Nonlinear Kalman Filtering Based Sensorless Direct Torque Control of Surface-Mounted Permanent Magnet Synchronous Motors, IEEE Transportation Electrification Conference and Expo (ITEC), pp. 448-453, 2018.

A. K. Paul, Sensorless Robust Speed Controller Design of Pancake Axial Field PMDC Motor, IEEE Transactions on Industry Applications, Vol. 55 (Issue 6):5981-5989, Nov.-Dec. 2019.

Zidan, H., Bashir, S., A Novel Robust Speed Sensor-Less Control of DC Motor, (2019) International Review of Automatic Control (IREACO), 12 (2), pp. 82-88.

S. Liu, Z. Qiu and W. Chen, Sensorless Control with Sliding Mode Observer for a Brushless DC Motor based on Concave Function, IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC), pp. 872-876, 2019.

M.G. Gan, M. Zhang, and C.Y. Zheng, An adaptive sliding mode observer over wide speed range for sensorless control of a brushless DC motor, Control Eng Pract, Vol. 77:52-62, 2018.

Y. Shao, R. Yang, J. Guo, and Y. Fu, Sliding mode speed control for brushless DC motor based on sliding mode torque observer, IEEE International Conference on Information and Automation, pp. 2466-2470, 2015.

S. Gueye, L. Thiaw, M. F. Ndiaye, I. Ngom, M. Diop and E. H. M. Ndiaye, A Sensorless Speed Control of DC Motor Based on an Adaptive Reference Model, 4th Biennial International Conference on Nascent Technologies in Engineering (ICNTE), pp. 1-5, 2021.

S. Geraee, M. Shafiei, A.R. Sahami, and S. Alavi, Position sensorless and adaptive speed design for controlling brushless DC motor drives. In 2017 North American Power Symposium (NAPS), IEEE, pp. 1-6, 2017.

R. Keswani, and R. Verma, Sensorless Luenberger observer based sliding mode control of DC motor. International Research Journal of Engineering and Technology (IRJET), 4(1): 265-268, 2017.

T. Abut, Control of a DC Motor using Sensorless Observer Based Sliding Mode Control Method, International Journal of Engineering Trends and Technology, 66(2): 67-72, 2018.

R. P. Tripathi, P. Gangwar and A. K. Singh, Speed Control of DC Motor with Kalman Filter and Fractional Order PID Controller, International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies (ICAECT), pp. 1-4, 2021.

R.P. Tripathi, A.K. Singh, P. Gangwar, and R.K. Verma, Sensorless speed control of DC motor using EKF estimator and TSK fuzzy logic controller, Automatika, 63(2): 338-348, 2022.

Boztas G, Aydogmus O., Implementation of sensorless speed control of synchronous reluctance motor using extended Kalman filter, Eng Sci Technol Int J., 1-7, 2021.

R. Cao, N. Jiang and M. Lu, Sensorless Control of Linear Flux-Switching Permanent Magnet Motor Based on Extended Kalman Filter, IEEE Transactions on Industrial Electronics, 67 (7): 5971-5979, 2020.

H. Noura, D. Theilliol, and J.C. Ponsart, Fault-tolerant Control Systems: Design and Practical Applications, (London: Springer-Verlag, 2009)

D.U. Campos-Delgado, S. Martinez, K. Zhou, Integrated fault-tolerant scheme for a DC speed drive, IEEE/ASME Mechatronics, 10:. 419-427, 2005

Indriawati, K., Sebe, N., Agustinah, T., Jazidie, A., Robust Fuzzy Observer-Based Fault Tolerant Tracking Control for Nonlinear Systems with Simultaneous Actuator and Sensor Faults: Application to a DC Series Motor Speed Drive, (2015) International Review of Automatic Control (IREACO), 8 (6), pp. 375-385.

Indriawati, K., Agustinah, T., Jazidie, A., Robust Observer-Based Fault Tolerant Tracking Control for Linear Systems with Simultaneous Actuator and Sensor Faults: Application to a DC Motor System, (2015) International Review on Modelling and Simulations (IREMOS), 8 (4), pp. 410-417.

D.A. Papathanasopoulos, and E.D. Mitronikas, Fault Tolerant Control of A Brushless DC Motor with Defective Position Sensors, XIII International Conference on Electrical Machines (ICEM), IEEE, pp. 1503-1509, 2018.

D. Karlina and K. Indriawati, Fault Tolerant Control for Speed Sensorless of DC Motor, International Conference on Smart Technology and Applications (ICoSTA), IEEE, pp. 1-5, 2020.

E. Vazquez-Sanchez, J. Gomez-Gil and M. Rodriguez-Alvarez, Analysis of three methods for sensorless speed detection in DC motors, International Conference on Power Engineering, Energy and Electrical Drives, Lisbon, 2009.

S. Cao, amd R.R. Rhinehart, An efficient method for on-line identification of steady state, Journal of Process control, pp.363-374, 1995

S. R. Bowes, A. Sevinç and D. Holliday, New Natural Observer Applied to Speed-Sensorless, IEEE Transaction on Industrial Electronics, Vol. 51(Issue 5), October 2004.

Faizullin, D., Hiraki, K., Cho, M., Estimating Sun Vector Based on Limited In-Orbit Data, (2019) International Review of Aerospace Engineering (IREASE), 12 (2), pp. 101-108.

Habib, T., Abouhogail, R., Efficient Simultaneous Spacecraft Attitude and Orbit Estimation via Neural Networks, (2021) International Review of Aerospace Engineering (IREASE), 14 (6), pp. 346-353.

Habib, T., Replacement of In-Orbit Modern Spacecraft Attitude Determination and Estimation Algorithms with Neural Networks, (2021) International Review of Aerospace Engineering (IREASE), 14 (3), pp. 166-172.


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