基于鲁棒二自由度增益自适应Smith预估器的冷轧厚度计型AGC

综合考虑冷轧厚度计型AGC(automatic gauge control)控制对象模型的渐变性以及在低速轧制时大时延引起的厚度反馈较大时滞,提出一种冷轧厚度计型AGC控制的改进方法来减弱这些系统不确定性和厚度反馈时滞带来的不利影响.推导出针对任意阶对象的增益自适应调节律,并给出了在保证系统鲁棒稳定条件下的控制器和滤波器参数选取原则.仿真结果证明这一新方法可有效地抑制干扰,而且在对象参数摄动时系统具有鲁棒稳定性.

Cold-rolling gaugemeter-type AGC based on robust two-degrees-freedom and gain-adaptive Smith-predictor

In view of the changing of a clod-rolling gaugemeter-type automatic gauge control (AGC) model and the gauge feedback resulted from long time-delay under low-speed rolling, a modified method of gaugemetertype AGC for cold-rolling to attenuate the bad influence resulted from uncertainties of the system was proposed. A new gain adaptive algorithm was deduced for an over two-order system with time-delay, and a principle for selecting controller parameters was given to ensure robust stability of the system. Simulation result shows that this method can effectively attenuate disturbance of the system, and stabilize the system when the parameters of the system is changing.