Robust speed control of rolling mill drive systems using the loop transfer recovery design methodology

Dhaouadi, Rached; Kubo, Kenji; Tobise, M.

doi:10.1109/iecon.1991.239225

Cited by 14 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the field of industrial drives, the torsional resonance problems were encountered first in rolling mill applications [1]- [3], [12], [13]. Long shafts and large inertia constitute a weakly damped mechanical resonator exhibiting a relatively low (10-20 Hz) resonance frequency.…”

Section: Introductionmentioning

confidence: 99%

“…For that reason, the suppression of mechanical vibrations is a control problem that attracted the attention of many researchers over the past decade. Solutions being proposed may be divided into the following three groups: 1) control strategies based on the direct measurement of motor-and load-side variables [15], [22], [24]; 2) strategies involving only one feedback device attached to the motor and the observer that estimates remaining states [2]- [4], [8], [10], [12], [13]; and 3) vibration suppression strategies based upon the notch filtering and phase-lead compensation applied in conventional speed control structures [4], [16], [17], [23].…”

Section: Introductionmentioning

confidence: 99%

“…The desired damping is obtained by adding a control term proportional to the speed difference [15], [17], [22], which requires measurements of both the motor and load velocities. The application of two shaft sensors is impractical in an industrial environment and, therefore, many authors suggested that the shaft torque and load speed be obtained by means of the state observer [2], [3], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Suppression of torsional oscillations in a high-performance speed servo drive

Vukosavić

Stojic

1998

IEEE Trans. Ind. Electron.

188

View full text Add to dashboard Cite

This paper deals with the problem of mechanical resonance in modern servo drive systems having the speed control loop bandwidth and resonance frequency above 100 Hz. To enable the extension of the range of stable gains in the presence of flexible coupling, a simple and straightforward modification of the speed loop controller is proposed in order to augment the performance of present speed controllers and to make them accordant with mechanical structure suffering from the compliance problem. This paper is comprised of the analytical considerations, straightforward design guidelines, and results of experimental verification obtained by an experimental setup with the elastically coupled 7-N1m synchronous servo motor and mechanical resonance frequency of 160 Hz.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Suppression of torsional oscillations in a high-performance speed servo drive

Vukosavić

Stojic

1998

IEEE Trans. Ind. Electron.

188

View full text Add to dashboard Cite

show abstract

“…Another negative consequence of shaft compliance is that torque changes on either the motor or load sides can lead to torsional vibrations or resonance, which can make speed/position control difficult and cause mechanical stress or even failure [15]. In order to use the two-mass model of a mechanical coupling for a magnetic gear, the following things must be considered.…”

Section: Two-mass Model Of a Mechanical Couplingmentioning

confidence: 99%

Modeling and Control of Magnetic Gear Dynamics in a Wind Turbine Drivetrain

Vournas¹

2000

View full text Add to dashboard Cite

This thesis looks at the modeling and simulation of linear and nonlinear magnetic gear dynamics in a wind turbine drivetrain. The objective is to lay the groundwork for analysis, modeling and optimization of control structures focused on pole-slip prevention.A classical mechanical two-mass torsion spring model is used as the basis for developing the dynamic system equations and Simulink models. The wind turbine torque input to the low speed rotor is modeled as a disturbance input, the generator torque is modeled as a controlled input, and the high-speed rotor speed is the only measured output. The nonlinear dynamics are linearized; and a state space model is built that utilizes both gear rotor speeds and the load angle as states. A state space feedback compensation controller is designed using pole placement techniques; and the sensitivity of the selected poles is tested across the full range of rated load angles. A full order observer is combined with state feedback compensation and the performance is evaluated with and without load angle speed regulation and integral action. A reduced order observer is designed with load torque estimation as an additional 'metastate', which is then used to calculate the load angle, providing a better estimate than what the observer directly provides. Finally, the accuracy of the reduced order observer to is tested using real torque data from a wind turbine.

show abstract

“…Low damped rotating multi-mass systems are indeed frequently encountered in industry applications such as steel rolling mills [1,2], power car or train transmission lines [15], marine propulsion transmission, . .…”

Section: Introductionmentioning

confidence: 99%

Robust Speed Control of a Low Damped Electromechanical System Based on CRONE Control: Application to a Four Mass Experimental Test Bench

et al. 2004

View full text Add to dashboard Cite

Robust speed control of a low damped electromechanical system with backlash is studied, controlled load angular speed being not measured. The proposed control strategy combines a Luenberger observer (load angular speed and load torque disturbance estimations) and a robust CRONE controller. The observer provides estimation of the load angular speed and of the disturbance torque applied on the load. Through the computation of only three independent parameters (as many as a PID controller), the CRONE controller permits to ensure the robust speed control of the load in spite of plant parametric variations and speed observation errors. The proposed control strategy is applied to a four mass experimental test bench.

show abstract

Robust speed control of rolling mill drive systems using the loop transfer recovery design methodology

Cited by 14 publications

References 7 publications

Suppression of torsional oscillations in a high-performance speed servo drive

Suppression of torsional oscillations in a high-performance speed servo drive

Modeling and Control of Magnetic Gear Dynamics in a Wind Turbine Drivetrain

Robust Speed Control of a Low Damped Electromechanical System Based on CRONE Control: Application to a Four Mass Experimental Test Bench

Contact Info

Product

Resources

About