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在构建汽轮机数字电液(DEH)调节系统状态评价指标体系的基础上,提出了一种可拓评价方法.基于可拓学的物元理论,建立了汽轮机DEH调节系统状态评价的多级物元模型,对DEH调节系统状态进行定性和定量评价;针对评价指标权重难以确定以及人为主观因素影响较大的问题,引入熵值理论,利用指标值的熵权确定权重,尽量消除权重计算的人为干扰,使评价结果更符合实际;最后通过实例验证了该方法的可行性与实用性.研究结果表明,该方法能快速而有效地识别汽轮机DEH调节系统的状态,从而为状态维修决策提供科学的依据.“,”On the basis of establishing a status evaluation index system of steam turbine DEH(digital electro-hydraulic) control system,proposed was an extensible evaluation method.Based on the physical element theory in topology,the authors have presented a multistage physical element model for evaluating qualitatively and quantitatively the status of a steam turbine DEH control system.In the light of the evaluation index weighting being difficult to determine and the relatively big influence of subjective factors,an entropy value theory was introduced and the entropy weight of the index value was employed to determine the weighting to eliminate to a maximally possible extent the human interference from the weighting calculation and make the evaluation results more close to practical conditions.Finally,through a practical example,the feasibility and practicability of the method in question was verified.The research results show that the method can quickly and effectively identify the status of a steam turbine DEH control system,thus providing a scientific basis for decision-making of status maintenance.