基于ARX模型的皮革切割机被控对象辨识研究

摘要

In order to deveIop Ieather cutting machines with high operating speed and high cutting precision,this paper makes servo driver with servo motor and mechanicaI transmission mechanism as a controI ed object.Using the sampIing system in-put and output data under open-Ioop,based on ARX modeI,with the appIication of recursive Ieast squares aIgorithm and A-IC criterion,this paper gives the mathematicaI modeI of the controI ed object,and verifies the vaIidity of the modeI with resid-uaI anaIysis.Experiments show that the method is feasibIe and can be used to adjust the motion controI er parameter opti-mization,prediction,and fauIt detection system forecasting.%为了开发出具有高运行速度和高切割精度的数控皮革切割机，将皮革切割运动控制系统的伺服驱动器、伺服电机以及机械传动机构作为被控对象，在开环下通过采样该系统的输入、输出数据，基于ARX模型，采用AIC准则法定阶，应用递推最小二乘算法，给出了被控对象的数学模型，并运用残差分析验证了模型的有效性。实验证明了该方法的可行性，可用于运动控制器参数调整优化、系统预测以及故障检测预报等。