摘要
采用模糊数来表征基本事件的失效率参数,引入扩张原理和Laplace-Stieltjes变换方法求解风电机组液压系统状态转移方程组,得到模糊失效率对应的隶属度和模糊动态可靠度,对风电机组液压系统进行可靠性评估。对不同厂家液压产品进行可靠性评估,研究液压元件失效率参数对液压系统可靠性的影响,指出液压元件可靠度匹配对提高液压系统可靠性具有重要作用。通过对液压系统的可靠性建模和分析验证该方法在解决具有动态失效特征和失效概率具有不确定性问题的可行性。
The fuzzy number is used to characterize the failure rate parameters of basic events and the extension principle and Laplace-Stieltjes transform are used to solve the state transition equations for hydraulic system of wind turbine. The membership degree and fuzzy dynamic reliability corresponding to fuzzy failure rate are obtained,and thereliability evaluation of hydraulic system of wind turbine is carried out. The reliability evaluation of hydraulic products ofdifferent manufacturers is carried out to study the influence of hydraulic component failure rate parameters on thereliability of hydraulic system. It is pointed out that the reliability matching of hydraulic components plays an importantrole in improving the reliability of hydraulic system. Through the reliability modeling and analysis of the hydraulicsystem,it is verified that the method is feasible to solve the problem of uncertainty with dynamic failure characteristicsand failure probability.
作者
李垚
朱才朝
宋朝省
谭建军
Li Yao;Zhu Caichao;Song Chaosheng;Tan Jianjun(State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing d00044,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第12期3584-3593,共10页
Acta Energiae Solaris Sinica
基金
重庆市重点产业共性关键技术创新专项(cstc2015zdcy-ztzx70012
cstc2015zdcy-ztzx70010)
重庆市研究生科研创新项目(CYB16024)
关键词
风电机组
液压模型
故障树分析
可靠性分析
马尔科夫链
模糊集
wind turbines
hydraulic models
fault tree analysis
reliability analysis
Markov chains
fuzzy sets
