非线性元件 meaning in English

non linear element
nonlinear component
nonlinear element

But in analyzing the dynamic characteristics of rolling mill , we find that the system exists nonlinear uncertainty and slow time - variation , which are caused by nonlinear mode and random disturbance . this leads to the approximation of the practical system of the model and parameter and it is difficult to construct the accurate mathematical model . therefore , the routine controlling method is n ' t used any longer
然而，在分析轧机的动态特性中发现，由于位置内环的模型中存在非线性元件，系统受到过多外界扰动的影响致使系统中存在非线性、不确定因素及慢时变参数的现象，推导出的模型结构和参数只是实际系统的一个粗糟近似，难以建立精确的数学模型，此时，常规控制方法已不再适用。