열간 사상압연기의 장력 연산모델과 루퍼-장력 ILQ 서보 제어 = Tension Modeling and Looper-Tension ILQ Servo Control of Hot Strip Finishing Mills

다국어 초록 (Multilingual Abstract)

This paper designs a looper-tension controller for mass-flow stabilization in hot strip finishing mills. By Newton's 2nd law and Hooke's law, nonlinear dynamic equations on the looper-tension system are firstly derived, and linearized by a linearization algorithm using a Taylor's series expansion. Moreover, a tension calculation model is obtained from the nonlinear dynamic equations which is called as a soft sensor of strip tension between two neighboring stands. Next, a looper-tension servo controller is designed by an ILQ(Inverse Linear Quadratic optimal control) algorithm, and it is combined with a minimal disturbance observer which to attenuate speed disturbances by AGC and operator interventions, etc.. Finally, it is shown from by a computer simulation that the proposed ILQ controller with a disturbance observer is very effective in stabilizing the strip mass-flow under some disturbances, moreover it has a good command following performance.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 루퍼-장력 시스템 모델링
• 3. 장력 연산모델 및 보정
• 4. 루퍼-장력 ILQ 제어기 설계
• 5. 모의실험 결과 및 고찰
• 6. 결론
• 참고 문헌