A robust fault diagnosis approach is developed by incorporating a set-membership identification (SMI) method. A class of systems with linear models in the form of fault related parameters is investigated, with model u...A robust fault diagnosis approach is developed by incorporating a set-membership identification (SMI) method. A class of systems with linear models in the form of fault related parameters is investigated, with model uncertainties and parameter variations taken into account explicitly and treated as bounded errors. An ellipsoid bounding set-membership identification algorithm is proposed to propagate bounded uncertainties rigorously and the guaranteed feasible set of faults parameters enveloping true parameter values is given. Faults arised from abrupt parameter variations can be detected and isolated on-line by consistency check between predicted and observed parameter sets obtained in the identification procedure. The proposed approach provides the improved robustness with its ability to distinguish real faults from model uncertainties, which comes with the inherent guaranteed robustness of the set-membership framework. Efforts are also made in this work to balance between conservativeness and computation complexity of the overall algorithm. Simulation results for the mobile robot with several slipping faults scenarios demonstrate the correctness of the proposed approach for faults detection and isolation (FDI).展开更多
[目的]筛选耐盐棉花种质,旨在为棉花耐盐种质鉴定和盐碱地区植棉研究提供理论依据。[方法]在150 mmol/L Na C1盐胁迫下对12个陆地棉品种的相对发芽率、胚根长、胚轴长和单株干重等指标进行测定,利用隶属函数值、主成分分析和聚类分析法...[目的]筛选耐盐棉花种质,旨在为棉花耐盐种质鉴定和盐碱地区植棉研究提供理论依据。[方法]在150 mmol/L Na C1盐胁迫下对12个陆地棉品种的相对发芽率、胚根长、胚轴长和单株干重等指标进行测定,利用隶属函数值、主成分分析和聚类分析法对陆地棉品种进行萌发期耐盐性综合评价。[结果]12个陆地棉品种盐胁迫下相对发芽率、胚根长、胚轴长和单株干重均受到抑制,不同耐性品种抑制程度差异显著;相对发芽率和胚根长、胚根胚轴干重、单株干重间呈正相关,单株干重和胚根胚轴干重间呈正相关,相对发芽率、物质转运率、胚根胚轴干重和胚根长可作为陆地棉萌发期耐盐性鉴定指标;主成分综合得分D值和隶属函均值FMV呈极显著正相关(R^(2)=0.977,P<0.01),且对陆地棉耐盐性评价是一致的;通过综合评价D值进行系统聚类分析,将12份陆地棉种质聚成5类,高抗盐材料有4份,抗盐材料有3份,耐盐材料有3份,不耐盐材料有1份,盐敏感材料有1份。[结论]中棉所49、辽棉25号、金垦1565、辽棉28号表现出较高的耐盐性,可作为耐盐性种质资源加以利用。展开更多
基金supported by the National Natural Science Foundation of China(616732546157310061573101)
文摘A robust fault diagnosis approach is developed by incorporating a set-membership identification (SMI) method. A class of systems with linear models in the form of fault related parameters is investigated, with model uncertainties and parameter variations taken into account explicitly and treated as bounded errors. An ellipsoid bounding set-membership identification algorithm is proposed to propagate bounded uncertainties rigorously and the guaranteed feasible set of faults parameters enveloping true parameter values is given. Faults arised from abrupt parameter variations can be detected and isolated on-line by consistency check between predicted and observed parameter sets obtained in the identification procedure. The proposed approach provides the improved robustness with its ability to distinguish real faults from model uncertainties, which comes with the inherent guaranteed robustness of the set-membership framework. Efforts are also made in this work to balance between conservativeness and computation complexity of the overall algorithm. Simulation results for the mobile robot with several slipping faults scenarios demonstrate the correctness of the proposed approach for faults detection and isolation (FDI).
文摘[目的]筛选耐盐棉花种质,旨在为棉花耐盐种质鉴定和盐碱地区植棉研究提供理论依据。[方法]在150 mmol/L Na C1盐胁迫下对12个陆地棉品种的相对发芽率、胚根长、胚轴长和单株干重等指标进行测定,利用隶属函数值、主成分分析和聚类分析法对陆地棉品种进行萌发期耐盐性综合评价。[结果]12个陆地棉品种盐胁迫下相对发芽率、胚根长、胚轴长和单株干重均受到抑制,不同耐性品种抑制程度差异显著;相对发芽率和胚根长、胚根胚轴干重、单株干重间呈正相关,单株干重和胚根胚轴干重间呈正相关,相对发芽率、物质转运率、胚根胚轴干重和胚根长可作为陆地棉萌发期耐盐性鉴定指标;主成分综合得分D值和隶属函均值FMV呈极显著正相关(R^(2)=0.977,P<0.01),且对陆地棉耐盐性评价是一致的;通过综合评价D值进行系统聚类分析,将12份陆地棉种质聚成5类,高抗盐材料有4份,抗盐材料有3份,耐盐材料有3份,不耐盐材料有1份,盐敏感材料有1份。[结论]中棉所49、辽棉25号、金垦1565、辽棉28号表现出较高的耐盐性,可作为耐盐性种质资源加以利用。
