熱連軋液壓活套系統非線性多變量建模及控制

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基金項目:

北京市教委重點學科共建資助項目（No.XK100080537）

Modelling and control of hydraulic looper nonlinear multi-variable systems

1. School of Information Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Electric and Information Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3. Department of Avionics Engineering, Shenyang Aviation Vocational Technical College, Shenyang 110034, China

摘要: 為進一步提高帶鋼熱連軋厚控精度及控制品質,在液壓活套的工作點附近,考慮帶鋼自重、液壓伺服系統和活套本身的非線性,建立了液壓活套系統的非線性多變量動態數學模型,并驗證了該模型的有效性.針對該模型,考慮未建模動態和各種擾動,提出了一種基于反推控制和擴張狀態觀測器(ESO)補償的解耦控制方法.用Lyapunov穩定理論證明了閉環系統是魯棒穩定的.仿真表明新的模型和解耦控制方法都是有效的.
- 熱軋 /
- 液壓控制設備 /
- 非線性系統 /
- 建模 /
- 解耦 /
- 反推
Abstract: In order to improve the control accuracy and quality of automatic gauges in hot trip rolling, a nonlinear muhiple-input multiple-output (MIMO) model of hydraulic loopers was built close to the working point in consideration of strip weight and the nonlinearity of hydraulic cylinders and loopers, and its validity was verified. A decoupling method based on back-stepping and extended state observers (ESO) was proposed for this new model taking all unmodelled dynamics and various disturbances into account. The robust stability of the closed-loop system was proved with the Lyapunov stability theory. Simulation results show that the proposed model and decoupling control method are available.
- hot rolling /
- hydraulic control equipment /
- nonlinear systems /
- modelling /
- decoupling /
- back-stepping