基于广义预测控制的液压弯辊控制系统

The hydraulic bending roll control system based on the generalized predictive control

针对液压弯辊控制这一随机干扰严重、滞后、时变的伺服系统,提出一种基于广义预测控制的液压弯辊控制系统。借助平稳随机序列预报思想建立系统输出误差预报模型,预报液压弯辊力未来序列输出误差并用以补偿系统的预测输出,从而提高了液压伺服控制系统的精度和抗干扰能力。仿真结果表明:采用广义预测控制并用预报误差代替一般的误差校正算法,液压弯辊板形控制系统精度和鲁棒性明显提高。

This paper proposes a new generalized predictive control of the hydraulic bending roll system which features serious disturbance, time delay, nonlinear, and time varying. Bending roll output error predictive model is constructed by means of random prediction. Future serial output error is predicted and compensated. The simulation results show that the system precision and robust is greatly improved through generalized predictive control and output error compensation instead of error correction.