Reducing dynamic loads in the mechatronic system of a rolling mill

2020 ◽  
pp. 45-48
Author(s):  
S.I. Malafeev ◽  
A.A. Malafeeva ◽  
V.I. Konyashin
Keyword(s):  
Direct Current ◽  
Electric Drive ◽  
Rolling Mill ◽  
Correction Method ◽  
System Model ◽  
Dynamic Loads ◽  
Dynamic Processes ◽  
Mechatronic System

A correction method for regulating the mechatronic system of a «DUO-300» rolling mill with a direct current electric drive is considered. The results of the study of dynamic processes in the mechatronic system with the proposed correction are presented. Keywords rolling mill, mechatronic system, model, electric drive, engine, regulator, correction. [email protected]

Correction of Rolling Mill Mechatronic System to Limit Dynamic Loads

2018 ◽  
Vol 38 (6) ◽  
pp. 431-433 ◽  
Author(s):  
S. I. Malafeev ◽  
A. A. Malafeeva ◽  
V. I. Konyashin
Keyword(s):  
Rolling Mill ◽  
Dynamic Loads ◽  
Mechatronic System

Starting Processes in Electric Drive of a Passenger Elevator

2021 ◽  
Vol 1 (1) ◽  
pp. 40-49
Author(s):  
S. Rachev ◽  
K. Dimitrova ◽  
D. Koeva ◽  
L. Dimitrov
Keyword(s):  
Coordinate System ◽  
Induction Motor ◽  
Electric Drive ◽  
High Speed ◽  
Induction Motors ◽  
Dynamic Loads ◽  
Design Stage ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Electric Induction

During the operation of electric induction motors used to drive passenger elevators, electro-mechanical transient processes occur, which can cause unacceptable dynamic loads and vibrations. In this regard, research is needed both at the design stage and for operating elevator systems to determine the arising impact currents and torques, in order to propose solutions for their limitation within pre-set limits. Paper deals with starting processes in a two-speed induction motor drive of a passenger elevator. The equations for the voltages of the induction motor are presented in relative units in a coordinate system rotating at a synchronous speed. The values have been obtained for the torques, the rotational frequencies and the currents when starting at a high speed and passing from high to low speed.

Oscillations in the Mechatronic System of a Multi-Stand Rolling Mill

2018 ◽  
Vol 38 (5) ◽  
pp. 342-347 ◽  
Author(s):  
S. I. Malafeev ◽  
A. A. Malafeeva ◽  
V. I. Konyashin
Keyword(s):  
Rolling Mill ◽  
Mechatronic System

scholarly journals CONTROL SYSTEM OF TWO MASS ELECTROMECHANICAL SYSTEM BASED ON INDUSTRIAL CONTROLLER

2020 ◽  
Vol 33 (109) ◽  
pp. 46-53
Author(s):  
E. Naydenko ◽  
◽  
D. Zahumennov
Keyword(s):  
Electric Drive ◽  
Control Algorithm ◽  
Control Program ◽  
Suspended Load ◽  
Management Program ◽  
Dynamic Loads ◽  
Control Methods ◽  
Mechanical Vibrations ◽  
Mass System ◽  
Industrial Controller

It is possible to create a control program for a two-mass system based on an industrial micro- controller. The software implements various control methods to reduce the dynamic loads in the kinematic elements during the transients. The methods of simulating the behavior of the mechanism in different condi- tions and time intervals is described, as well as demonstration of the system operation and registration of relevant data. Numerous studies have shown that mechanical vibrations in most cases adversely affect the operation of the electric drive, causing an increase in dynamic loads, which reduces the accuracy of the mechanism, the occurrence of mechanical vibrations that create a dangerous situation. In the transients, when the suspension point of the load moves with acceleration, there is a swing of the load relative to its equilibrium position. The aim of the work is to control the mechanism of horizontal movement by an indus- trial controller, which implements the reduction of loads in the kinematic transmissions during the transi- ents, increases the speed and dampens the oscillations of the suspended load. The task is to develop a control algorithm and demonstrate the possibility of implementing the necessary control laws of the industrial con- troller. The possibility of realization of a microcontroller control of the asynchronous electric drive of the translational movement mechanism with the suspended load is shown, the control algorithm providing re- duction of the dynamic loadings in the kinematic elements is developed, and at small values of a backlash it provides speed and damping of the fluctuations suspended on a flexible thread. The management program is implemented on the basis of the industrial controller. It is possible to demonstrate the operation of the sys- tem in real time, as well as, changing the scale of time, to investigate the dynamic loads arising in the kine- matic elements of the mechanism under different conditions and control methods.

scholarly journals Computer model of electric drive of 1L100K conveying unit

2019 ◽  
Vol 134 ◽  
pp. 01012
Author(s):  
Denis Zolkin ◽  
Vadim Petrov
Keyword(s):  
Control System ◽  
Electric Drive ◽  
Ring System ◽  
Vibration Damping ◽  
Electromechanical System ◽  
Dynamic Loads ◽  
Belt Conveyor ◽  
Electric Drives ◽  
Belt Conveyors ◽  
Elastic Elements

The paper deals with the problems of vibration damping and limiting dynamic loads in the electromechanical system of a belt conveyor by means of an adjustable electric drive. A conveying unit is represented as a three-mass ring system, which corresponds to a conveying unit with cinematically closed tape. The development of the structure of the control system for electric drives of belt conveyors with limited dynamic loads in elastic elements will reduce the dynamic loads on the belt and therefore the wear of the belts. Conditions of damping of oscillations in electromechanical system of belt conveyors are defined.

Determination of dynamic loads in the main drive of the rolling mill at rolling strips with finned

2017 ◽  
pp. 49-55
Author(s):  
I. I. Nekrasov ◽  
◽  
A. A. Fedulov ◽  
V. S. Parshin ◽  
S. A. Neiman ◽  
...  
Keyword(s):  
Rolling Mill ◽  
Dynamic Loads

Control algorithms and stability of direct current backup power supply for a frequency-controlled electric drive

2015 ◽  
Vol 86 (8) ◽  
pp. 485-489 ◽  
Author(s):  
V. V. Vdovin ◽  
D. P. Visloguzov ◽  
V. A. Clan ◽  
D. A. Kotin ◽  
V. V. Pankratov ◽  
...  
Keyword(s):  
Direct Current ◽  
Electric Drive ◽  
Power Supply ◽  
Control Algorithms

scholarly journals Issues of Multi-Motor Electric Drive Dynamics through the Example of Converter Tilting Mechanism

2020 ◽  
Vol 5 (3) ◽  
pp. 253-265
Author(s):  
V. F. Borisenko ◽  
V. A. Sidorov ◽  
A. I. Zemlyansky
Keyword(s):  
Simulation Model ◽  
Electric Drive ◽  
Metallurgical Industry ◽  
Natural Oscillation ◽  
Dynamic Loads ◽  
Control Voltage ◽  
Operation Conditions ◽  
Simulink Model ◽  
Acceleration And Deceleration ◽  
Basic Oxygen Converters

Many heavy machines and mechanisms of mining and metallurgical industry, for example, basic-oxygen converters (BOCs), are equipped with multi-motor electric drive. Reducing the influence of the disadvantages characteristic of a branched multi-connected system is possible by creating control systems based on mathematical models of the considered electromechanical systems (EMS). The full mathematical model takes into account the number of EMS motors, gear backlashes, elasticity of shafting, the effect of dissipative forces, etc. Disadvantage of this approach is complexity of such models, which leads to high computational costs and time expenditure for their implementation. To analyze dynamic processes arising under acceleration and deceleration conditions of the electromechanical system of the converter tilting mechanism, it is proposed to use a simplified equivalent simulation model, which would take into account changing the EMS natural oscillation frequency for any operation conditions based on process and design features. Based on the simulation model analysis, it was concluded that it is necessary to assess mechanical loads in the system by comparing their current and basis values, as well as taking into account the damping properties of the electric drive. To reduce dynamic loads, it is proposed to form a law of changing the control voltage using an intensity generator, which reduces the risks of occurrence of elastic moments, significantly exceeding those permissible for this class of mechanisms. The results of thermal and vibration diagnostics for assessing malfunctions of key units of the converter tilting mechanism, as well as assessing the system behavior based on the Matlab Simulink model with varying shafting elasticity and normalized gear backlashes, showed significant effect of the latters on the dynamic loads.

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