Material tracking with dynamic torque adaptation for tension control in wire rod mill

Material tracking is an important part of the automation control system which has a major impact on the product quality. This paper addresses a stand load identification in wire rod mill as a new algorithm added to existing control system. Tension control approaches are described and a modification of existing tracking system is proposed in order to eliminate tracking faults. Proposed method is based on dynamic torque calculation and its performance was experimentally verified on the industrial wire rod mill. Experimental results show significant reduction of the errors

A HARDWAREINTHELOOP SIMULATOR BASED ON REAL SKODA SUPERB VEHICLE AND RTLAB/CARSIM

This paper describes the design and realization of a hardware-in-the-loop simulator made from a real Skoda Superb vehicle. A combination of RT-LAB and CarSim software is used for real-time control and for handling the sensoric subsystems. The simulator provides almost realistic testing of driving cycles with on-line visualization. This unique device can be used in various fields of research

A HARDWARE-IN-THE-LOOP SIMULATOR BASED ON REAL SKODA SUPERB VEHICLE AND RT-LAB/CARSIM

This paper describes the design and realization of a hardware-in-the-loop simulator made from a real Skoda Superb vehicle. A combination of RT-LAB and CarSim software is used for real-time control and for handling the sensoric subsystems. The simulator provides almost realistic testing of driving cycles with on-line visualization. This unique device can be used in various fields of research

Practical experience with control of drives of an accumulator in a web processing continuous line

Abstract: The paper contributes to a study of web a vertical type accumulator in a continuous line. It is focused on control of parallel drives driving the looper car and is pointing out key problems the engineer meet at tuning controllers of the accumulator drives. Although the control structure is well known, practical hints to estimate empirically some parameters of the systems are presented. The accumulator mechanics was modelled and simulated results are presented. They are compared with the results obtained by measurement on the real accumulator system. The results obtained by both methods show a good agreement that confirm correctness of the simulation model

Finite Control Set Model Predictive Speed Control of a DC Motor

The paper describes the design procedure for a finite control set model predictive control (FCS-MPC) of brushed permanent magnet DC (PMDC) machine supplied from DC-DC converter. Full order linear Kalman filter is used for estimation of an unmeasured load torque and reduction of speed measurement noise. A new cost function has been introduced with a feedforward dynamic current component and a feedforward static load current component. The performance of the proposed control strategy is compared to the conventional PI-PWM cascade speed control through the experimental verification on the 250 W laboratory prototype. Obtained results show excellent dynamic behaviour and indicate possible energy savings of the proposed speed control

Design and Simulation of Direct and Indirect Back EMF Sliding Mode Observer for Sensorless Control of PMSM

This article compares two sensorless control algorithms for a permanent magnet synchronous machine (PMSM) based on the back-EMF sliding mode observer (SMO). Indirect SMO (I-SMO) treats the back-EMF voltages as a disturbance. Direct SMO (D-SMO) considers back-EMF voltages as state-space variables. The same phase-locked loop (PLL) is used for both observers for extraction of the rotor position and speed values from the observed back-EMF voltages. In a sensorless control, the observed speed is used as feedback for the PI controller, and the observed position is used in the Park transformations. Both observers have been implemented and tested with standard field-oriented control. Simulation results indicate rather comparable speed and position estimation precision for both, but the D-SMO indicates slightly higher precision in steady-state. Even more, a tuning procedure of the D-SMO is more straightforward when compared to the I-SMO. Thus, the D-SMO was further verified experimentally with the OP 5600 rapid prototyping device and with a 350 W PMSM drive. Experimental results of the D-SMO are included at the end of the paper

DETERMINATION OF INITIAL COMMUTATION ANGLE OFFSET OF PERMANENT MAGNET SYNCHRONOUS MACHINE -AN OVERVIEW AND SIMULATION

ABSTRACT Identification of initial commutation angle belongs to the basic routines at the commissioning of industrial drives with permanent magnet synchronous machine. This paper deals with problem of commutation angle offset determination. Two methods are described and simulated in detail. The first method is based on application of a DC voltage and the second one is based on the use of the current controllers. Both methods use rotor movement to reach defined position. Simulation and experimental results are included providing mutual comparison of these methods