基于组合赋权法和云重心评估法的燃气轮机健康状态评估

鉴于表征燃气轮机健康状态的信息具有模糊性和随机性的特点,提出了一种基于组合赋权法和云重心评估法相结合的健康状态评估方法。方法首先运用层次分析法和熵权法分别计算燃气轮机评估指标的权重值,再通过组合赋权法,得到具有主客观意义的权重;在此基础上,引入云重心评估法对燃气轮机进行评估;并采用加权偏离度衡量系统状态变化的程度,从而确定燃气轮机健康状态等级。以某型真实燃气轮机为例,对其进行了试验验证。验证结果表明,提出的基于组合赋权法和云重心评估法的健康状态评估方法能有效对燃气轮机进行评估;并能够弱化燃气轮机健康状态监测信息的随机性和模糊性。

Health Status Evaluation of Gas Turbine Based on Combination Weight and Cloud Gravity Center Evaluation Method

Given the features of gas turbine health information, which are fuzzy and random, a method of health status assessment is proposed, the method based on combination weight and cloud gravity center evaluation method. First of all, this method uses the analytic hierarchy process and the entropy method to calculate the weight of the evaluation indicators of gas turbines respectively, and then get the weight of subjective and objective sense weight through the combination weight, on this basis, using cloud gravity center evaluation method to evaluate the health status of gas turbine and using the weighted deviation degree to measure the changes of system state, so as to determine the gas turbine health level. A certain type of real gas turbine as an example to test verification, the results shows that the method of assessment, which based on combination weight and cloud gravity center evaluation can effectively evaluate the gas turbine and can weaken the randomness and ambiguity of gas turbine health monitoring information.