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针对钛合金板轧制时间短而导致的厚度控制精度较低的问题,引入无模型自适应厚度控制方法,其不依赖于被控对象的数学模型,仅利用被控对象的输入输出数据便可对被控对象进行控制。泛模型在无模型自适应控制算法中起着十分重要的作用,其中的伪偏导数φc(k)对算法的收敛速度和跟踪能力有很大影响。利用递推最小二乘法实时辨识φc(k),确保了对时变参数的快速跟踪和小的参数估计误差。仿真结果表明:无模型自适应控制的控制效果明显优于传统的PI控制。
Aiming at the problem of low thickness control accuracy due to the short rolling time of titanium alloy plates, a model-free adaptive thickness control method is introduced, which does not depend on the mathematical model of the controlled object. Only the input and output data of the controlled object can be used The controlled object to be controlled. The pan-model plays an important role in the model-free adaptive control algorithm. The pseudo-partial derivative φc (k) has great influence on the convergence speed and tracking ability of the algorithm. Real-time identification of φc (k) using recursive least squares ensures fast tracking of time-varying parameters and small error of parameter estimation. The simulation results show that the control effect of model-free adaptive control is obviously better than the traditional PI control.