Development of an Automatic Elastic Torque Control System Based on a Two-Mass Electric Drive Coordinate Observer

Radionov, Andrey A.; Karandaev, A. S.; Gasiyarov, Vadim R.; Loginov, B. M.; Gartlib, Ekaterina A.

doi:10.3390/machines9120305

Cited by 11 publications

(18 citation statements)

References 47 publications

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“…Ref. [46] provides the mill specifications and assortment and describes power equipment. Figure 1b [16] schematically shows the design of the stand with the upper and lower work roll spindles.…”

Section: The Research Object Specificsmentioning

confidence: 99%

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Voronin,

Loginov,

Gasiyarova

et al. 2024

JMMP

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This article outlines the relevance of building online telemetry systems for online monitoring of the technical conditions of rolling mill equipment. Electromechanical systems of the horizontal stand of the plate Mill 5000 are described, when operating in harsh conditions caused by the shock loading when workpieces enter the stand. It is noted that dynamic torque overloads, exceeding the rated motor torque by many-fold, cause the fatigue failure of spindle joints and breakage of rolls. In this regard, the development and implementation of systems for monitoring the elastic torque on spindles are extremely urgent. This issue has long been studied, but the references provide no information on the building principles and hardware composition of such systems. The use of strain gauges connected according to a balanced bridge circuit to measure the elastic torque is justified. This paper’s contribution is the proposed modular principle for building a telemetry monitoring system based on the analysis of known techniques for measuring and transmitting diagnostic data. The developed system structure is provided and the concept of data transfer and processing are explained. This article suggests the inductive power supply of a measuring unit mounted on a shaft without the use of batteries. A hardware structure was developed to be applied in a system for measuring, transmitting, and visualizing signals proportional to the elastic torque, manufactured on the basis of data measuring instruments by leading companies. The specifics of placement and connection of strain gauges are considered. The hardware providing a wireless power supply to the signal encoder and digital data transfer between the transmitter and receiver is described. The results of implementing the system on Mill 5000 are provided. The installation of a telemetry ring and a receiving head for the inductive power supply and data reception is shown. An experimental assessment of the elastic torques occurring when workpieces enter the cage was obtained by implementing a drive control algorithm which provided biting in the drive acceleration mode. The reliability of measuring the elastic torque with an error not exceeding ±5% and the reduction of dynamic loads on the spindle by 1.3–1.5 times due to the elimination of impacts from closing angular gaps in spindle joints was confirmed. This increases the service life of mechanical equipment and reduces the cost of eliminating the accident aftermath. The prospect of modifying the developed system into a cyber-physical system for monitoring the rolling mill’s mechatronic equipment conditions is shown.

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Section: The Research Object Specificsmentioning

confidence: 99%

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Voronin,

Loginov,

Gasiyarova

et al. 2024

JMMP

Self Cite

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“…Ref. [27] emphasizes that when creating DTs, a compromise should be found between the complexity of the mathematical description of variable frequency drives based on Park-Gorev equations and the capabilities of simpler models reliably describing the process, the consideration of which is relevant for solving a specific problem.…”

Section: Multi-mass Models Of Electromechanical Systems In Rolling Millsmentioning

confidence: 99%

Method for Defining Parameters of Electromechanical System Model as Part of Digital Twin of Rolling Mill

Gasiyarov,

Radionov,

Loginov

et al. 2023

JMMP

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Creating digital twins of industrial equipment requires the development of adequate virtual models, and the calculation of their parameters is a complex scientific and practical problem. To configure and digitally commission automated drives, two-mass electromechanical system models are used. A promising area in which to implement such models is the development of digital shadows, namely drive position observers. Connecting virtual models for online data exchange predetermines the tightening of requirements for their parameter calculation accuracy. Therefore, developing accessible techniques for calculating electromechanical system coordinates is an urgent problem. These parameters are most accurately defined by experiments. The contribution of this paper is the proposition of a method for defining the two-mass system model parameters using the oscillograms obtained in the operating and emergency modes. The method is developed for the horizontal stand drives of a plate mill 5000 and is supported by numerical examples. The technique is universal and comprises calculating the rotating mass inertia torques, elastic stiffness and oscillation damping coefficients, and the time constants of the motor air gap torque control loop. The obtained results have been applied to the development of the elastic torque observer of the rolling stand’s electromechanical system. A satisfactory coordinate recovery accuracy has been approved for both open and closed angular gaps in mechanical joints. Recommendations are given for the use of the method in developing process parameter control algorithms based on automated drive position observers. This contributes to the development of the theory and practice of building digital control systems and the implementation of the Industry 4.0 concept in industrial companies.

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“…Definitions and specifications of digital models, twins, and shadows are given in [28,29]. The practice of using observers to monitor the elastic torque in electromechanical system shafting is described in [30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

et al. 2022

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Algorithms for monitoring the rolling mill mechatronic system state should be developed on the basis of modern digital technologies. Developing digital shadows (observers) of system state parameters in the periodic measurement mode is promising. This study relevance is defined by frequent emergency breakdowns of rolling stand mechanical transmissions. Most breakdowns are caused by worn end clutches (heads) of countershafts (spindles) transmitting rotation from the motor to the rolls. This is caused by elastic oscillations due to closing angular gaps when the metal enters the stand. The spindle joint angular gap increases over time with the mill operation. Therefore, it is an important diagnostic parameter that allows for an estimation of the transmission serviceability. In this regard, the problem of monitoring the angular gaps in the rolling stand mechatronic systems is relevant. The paper considers developing an observer of angular gaps in the spindle joints of the ‘electric drive-stand’ mechatronic system of the plate Mill 5000 of Magnitogorsk Iron and Steel Works PJSC (MMK PJSC). The monitored signal (angular gap) is calculated with the mathematical processing of the motor’s physical parameters (speed and electromagnetic torque), measured at a given frequency. The gap is determined indirectly by integrating the speed during its closing. To achieve this, the speed is controlled according to the triangular tachogram at no load. The stand’s electromechanical system modes have been studied using mathematical simulation. The observer’s practical use expediency has been reasoned. The structure of the observer-based angular gap monitoring information system is given. The system has been full-scale tested on Mill 5000, which has confirmed the developed algorithm efficiency. The study’s contribution is a justified and implemented concept of a relatively simple technical solution that can be commercially implemented without extra costs. The angular gap calculation algorithm does not involve complex mathematical techniques and can be implemented in industrial rolling mill controllers. Monitoring is automated without human involvement, which eliminates the human factor. The solution has a specific practical focus and is recommended for implementation at operating rolling mills.

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Development of an Automatic Elastic Torque Control System Based on a Two-Mass Electric Drive Coordinate Observer

Cited by 11 publications

References 47 publications

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Method for Defining Parameters of Electromechanical System Model as Part of Digital Twin of Rolling Mill

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

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