A novel approach for constructing robust Mamdani fuzzy system was proposed, which consisted of an efficiency robust estimator(partial robust M-regression, PRM) in the parameter learning phase of the initial fuzzy syst...A novel approach for constructing robust Mamdani fuzzy system was proposed, which consisted of an efficiency robust estimator(partial robust M-regression, PRM) in the parameter learning phase of the initial fuzzy system, and an improved subtractive clustering algorithm in the fuzzy-rule-selecting phase. The weights obtained in PRM, which gives protection against noise and outliers, were incorporated into the potential measure of the subtractive cluster algorithm to enhance the robustness of the fuzzy rule cluster process, and a compact Mamdani-type fuzzy system was established after the parameters in the consequent parts of rules were re-estimated by partial least squares(PLS). The main characteristics of the new approach were its simplicity and ability to construct fuzzy system fast and robustly. Simulation and experiment results show that the proposed approach can achieve satisfactory results in various kinds of data domains with noise and outliers. Compared with D-SVD and ARRBFN, the proposed approach yields much fewer rules and less RMSE values.展开更多
提出了一种基于核密度估计的核偏鲁棒M-回归(kernel partial robust M-regression based on kernel density estimation,KDE-KPRM)方法。以核密度估计加权策略代替原来的M估计加权策略,利用主成分分析技术和核密度函数识别高杠杆点(输...提出了一种基于核密度估计的核偏鲁棒M-回归(kernel partial robust M-regression based on kernel density estimation,KDE-KPRM)方法。以核密度估计加权策略代替原来的M估计加权策略,利用主成分分析技术和核密度函数识别高杠杆点(输入变量空间异常点),利用残差和核密度函数识别高残差点(输出变量空间异常点),无需反复迭代便可以为样本赋予合适权重,有效地提高了建模速率。通过函数仿真和实际工业仿真,证明了所提出的方法比标准的核偏鲁棒M-回归算法有更好的鲁棒性和更高的建模效率。展开更多
作为钢铁冶金制造的核心工序,高炉炼铁是典型的高能耗过程,其运行能耗约占钢铁总能耗的50%以上,其中,80%的能耗是焦炭和煤粉等燃料消耗.因此,对表征高炉燃料消耗的燃料比参数进行监测,并尽可能早地识别影响燃料比异常波动的关键因素,对...作为钢铁冶金制造的核心工序,高炉炼铁是典型的高能耗过程,其运行能耗约占钢铁总能耗的50%以上,其中,80%的能耗是焦炭和煤粉等燃料消耗.因此,对表征高炉燃料消耗的燃料比参数进行监测,并尽可能早地识别影响燃料比异常波动的关键因素,对于高炉炼铁过程的节能降耗具有重要意义.本文针对先验故障知识少的高炉燃料比监测与异常识别难题,提出一种基于核偏最小二乘(Kernel partial least squares,KPLS)鲁棒重构误差的故障识别方法.该方法首先建立过程变量与监测变量的KPLS监测模型,然后根据非线性映射空间的协方差矩阵和核空间Gram矩阵之间的关系,反向估计原始空间变量的正常估值.为了增强算法的鲁棒性,采用迭代去噪算法减少异常数据对原始空间正常估值的影响.通过利用原始空间正常估值和真实值来构造故障识别指标,并给出故障识别指标的控制限.基于实际工业数据的高炉数据实验表明所提方法不仅可以监测出正常工况下影响燃料比异常变化的潜在因素,还可识别出异常工况下影响燃料比异常变化的关键因素,具有很好的工程应用前景.展开更多
基金Project(61473298)supported by the National Natural Science Foundation of ChinaProject(2015QNA65)supported by Fundamental Research Funds for the Central Universities,China
文摘A novel approach for constructing robust Mamdani fuzzy system was proposed, which consisted of an efficiency robust estimator(partial robust M-regression, PRM) in the parameter learning phase of the initial fuzzy system, and an improved subtractive clustering algorithm in the fuzzy-rule-selecting phase. The weights obtained in PRM, which gives protection against noise and outliers, were incorporated into the potential measure of the subtractive cluster algorithm to enhance the robustness of the fuzzy rule cluster process, and a compact Mamdani-type fuzzy system was established after the parameters in the consequent parts of rules were re-estimated by partial least squares(PLS). The main characteristics of the new approach were its simplicity and ability to construct fuzzy system fast and robustly. Simulation and experiment results show that the proposed approach can achieve satisfactory results in various kinds of data domains with noise and outliers. Compared with D-SVD and ARRBFN, the proposed approach yields much fewer rules and less RMSE values.
文摘提出了一种基于核密度估计的核偏鲁棒M-回归(kernel partial robust M-regression based on kernel density estimation,KDE-KPRM)方法。以核密度估计加权策略代替原来的M估计加权策略,利用主成分分析技术和核密度函数识别高杠杆点(输入变量空间异常点),利用残差和核密度函数识别高残差点(输出变量空间异常点),无需反复迭代便可以为样本赋予合适权重,有效地提高了建模速率。通过函数仿真和实际工业仿真,证明了所提出的方法比标准的核偏鲁棒M-回归算法有更好的鲁棒性和更高的建模效率。
文摘作为钢铁冶金制造的核心工序,高炉炼铁是典型的高能耗过程,其运行能耗约占钢铁总能耗的50%以上,其中,80%的能耗是焦炭和煤粉等燃料消耗.因此,对表征高炉燃料消耗的燃料比参数进行监测,并尽可能早地识别影响燃料比异常波动的关键因素,对于高炉炼铁过程的节能降耗具有重要意义.本文针对先验故障知识少的高炉燃料比监测与异常识别难题,提出一种基于核偏最小二乘(Kernel partial least squares,KPLS)鲁棒重构误差的故障识别方法.该方法首先建立过程变量与监测变量的KPLS监测模型,然后根据非线性映射空间的协方差矩阵和核空间Gram矩阵之间的关系,反向估计原始空间变量的正常估值.为了增强算法的鲁棒性,采用迭代去噪算法减少异常数据对原始空间正常估值的影响.通过利用原始空间正常估值和真实值来构造故障识别指标,并给出故障识别指标的控制限.基于实际工业数据的高炉数据实验表明所提方法不仅可以监测出正常工况下影响燃料比异常变化的潜在因素,还可识别出异常工况下影响燃料比异常变化的关键因素,具有很好的工程应用前景.
