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针对板带轧机厚度控制系统的参数变化导致故障诊断困难及实际故障模拟费用高、危险性大等问题,在充分考虑轧机机体各部分的质量、刚度和阻尼分配的情况下,应用模块化建模的方法,建立了轧机厚度控制系统的三自由度动态仿真模型。此模型可以更完善地反映系统各参数变化对系统响应的影响,为一种具有实用价值的故障模拟模型。应用所建模型的系统动态响应,进行典型故障的模拟研究,所获取的故障特征可为系统故障预测和诊断提供依据。试验数据验证了模型的正确性和故障模拟的可行性。
Aiming at the problems such as the difficulty of fault diagnosis and the fact that the actual fault simulation cost is high and the risk is so great, the parameter variation of strip thickness control system of strip mill leads to the problems of mass, stiffness and damping distribution in all parts of rolling mill, Method, a 3-DOF dynamic simulation model of rolling mill thickness control system is established. This model can better reflect the influence of system parameters on system response, and is a kind of fault simulation model with practical value. The dynamic response of the system is used to simulate typical faults. The fault characteristics obtained can provide the basis for system fault prediction and diagnosis. Experimental data verify the correctness of the model and the feasibility of fault simulation.