Abstract
Improvement of the existing facilities is an important topic for research. Mechanisms of metallurgical enterprises involved in a complex technological cycle often operate under conditions of increased vibrations and the presence of polluting components in the environment, these factors together negatively affect the measuring devices reducing the accuracy of their measurement. Switching to sensor-free control systems allows you to reduce the size of the device, get rid of measurement errors arising from the presence of connecting components between sensors and information processing devices. It also increases the system performance. All these indicators directly affect the quality of products. Parallelization of sensorless control systems is possible by introducing speed observers into the system, which use data obtained in the frequency converter for other purposes to obtain the necessary output parameters. Observers represent a mathematical structure that functions according to certain rules or algorithms. The paper considers several types of observers selected on the basis of a number of criteria, the main one being ease of implementation. The object in question uses an asynchronous motor with a short-circuited rotor, which is controlled by a frequency converter. In the Matlab mathematical modeling environment, the following were developed: a coiler drive control system, a non-adaptive observer, a Kalman observer (filter), an adaptive observer with flow coupling comparison, and an adaptive observer with EMF comparison. The system with a non-adaptive observer was taken as the reference model since the data of the transient process in speed coincided with the data obtained from the speed sensor with a minimum error. Comparison of the simulation results was carried out on the basis of the analysis of the error of the obtained speed characteristics when using different types of speed observers.
Keywords
Electric drive, control system, speed monitors, coiler, Simulink simulation, Matlab, asynchronous motor.
1. Kapuntsov Yu. D., Eliseev V.A., Ilyashenko L.A. Elektrooborudovanie i elektroprivod promyshlennykh ustanovok [Electrical equipment and electric drive of industrial installations]. Moscow: High school, 1979, 359 p. (In Russian)
2. Fotiev M.M. Elektrooborudovanie predpriyatiy chernoy matallurgii [Electrical equipment of ferrous metallurgy enterprises]. Moscow: Metallurgy, 1980. 312 p. (In Russian)
3. Bychkov V.P. Elektroprivod i avtomatizatsiya metallurgicheskogo proizvodstva [Electric drive and automation of metallurgical production]. Moscow: High school, 1977, 391 p. (In Russian)
4. Sinyukov A.V., Sinyukova T.V. Optimization of the tension control system in the intercellular spaces of the cold rolling mill. XVI Vserossiiskaya naucho-prakticheskaya konferentsiya studentov i aspirantov [XVI all-Russian scientific and practical conference of students and postgraduate students], Stary Oskol, 2019, pp. 445-447. (In Russian)
5. Sinyukova T.V., Sinyukov A.V. Non-adaptive observers in electric drive control systems. Upravlenie bolshimi sistemami: sbornik trudov XV Vserossiyskoy shkoly-konferentsii molodykh uchyenykh [Management of large systems: proceedings of the XV all-Russian school-conference of young scientists]: in 2 volumes, vol. 2. Voronezh state technical University, September 10-13, 2018. Voronezh: VSTU Publishing house, 2018, pp. 103-109. (In Russian)
6. Sinyukova T.V., Sinyukov A.V., Sinyukova A.A. Application of adaptive observers in the control system of the electric drive of the movement mechanism. Upravlenie bolshimi sistemami: sbornik trudov XV Vserossiyskoy shkoly-konferentsii molodykh uchyenykh [Management of large systems: proceedings of the XV all-Russian school-conference of young scientists]: in 2 volumes, vol. 2. Voronezh state technical University, September 10-13, 2018. Voronezh: VSTU Publishing house, 2018, pp. 110-115. (In Russian)
7. Sinyukova T.V., Sentsov E.V., Sinyukov A.V. Neural net-work speed observers // 2019 1st International Conference on Control Systems, Mathematical modeling, Automation and Energy Efficiency (SUMMA), Lipetsk State Technical University, 2019.
8. KalachevYu.N. Nablyudateli sostoyaniya v vektornom elektroprivode [State observers in a vector electric drive]. Moscow, 2015. 60 p. (In Russian)
9. Domanov V.I., Domanov A.V., Bilalova A.I. Synthesis of sensorless induction motor control system. Promyshlennye ASU i kontrollery [Industrial ACS and controllers]. 2018, no. 7, pp. 3-9. (In Russian)
10. Dadenkov D. A., Belonogov A.V., Varzanosov P.V. Non-static vector control with adaptive speed observation and direct correction of the electric angle. Fundamentalnye issledovaniya [Fundamental research], 2016, no. 11-3, pp. 505-509. (In Russian)
11. Meshcheryakov V.N., Pikalov V.V., Boikov A.I. Investigation of a full-order observer for a sensorless electric drive system. Vesti vysshikh uchebnykh zavedeniy Chernizemya [Proceedings of higher educational institutions of the Chernozem region], 2018, no. 4 (54), pp. 39-49. (In Russian)
12. Ostrovlyanchik V.Yu., Popolzin I.Yu. Model of asynchronous motor for sensorless information and control systems of automated electric drive. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of Kuzbass State Technical University], 2016, no. 1 (113), pp. 111-120. (In Russian)
13. Dadenkov D.A., Solodkiy E.M., Shachkov A.M. Modeling of a vector control system for an asynchronous motor in the Matlab/Simulink package. Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Elektrotekhnika, informatsionnye tekhnologii, sistemy upravleniya [Bulletin of Perm National Research Polytechnic University. Electrical engineering, information technologies, management systems], 2018, no. 11, Pp. 117-128. (In Russian)
14. Nguyen K.T. Sensorless vector control system for torque and speed of induction motor. Elektrotechnika [Electrical engineering], 2012, no. 2, pp. 11-15. (In Russian)
15. Sokolovsky G.G. Elektroprivody peremennogo toka s chastotnym regulirovaniem [AC-Drives with frequency regulation]. Moscow: Academy, 2006. 265 p. (In Russian)
16. Braslavsky I.Ya., Ishmatov Z.Sh., Polyakov V.N. Energosberegayushchiy asinkhronnyi elektroprivod [Energy-saving asynchronous electric drive]. Moscow: Academy, 2004. 256 p. (In Russian)