针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble ...针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble Empirical Mode Decomposition with Adaptive Noise,CEEMDAN)将故障电弧电流分解为不同本征模态函数分量并对其提取多尺度模糊熵、时域、频域组合特征。最后设计秃鹰搜索-随机森林算法(Bald Eagle Search and Random Forest,BES-RF)进行电弧故障检测,结果表明:检测准确率达98.05%,相比传统分解方法与检测算法准确率提高3.5%、4.7%,验证该方法的有效性。展开更多
The joint-bolt-African Vulture optimization algorithm(AVOA)model is proposed for the design of building connections to improve the stability of steel beam-to-column connections.For this algorithm,the type of steel is ...The joint-bolt-African Vulture optimization algorithm(AVOA)model is proposed for the design of building connections to improve the stability of steel beam-to-column connections.For this algorithm,the type of steel is first determined,and the number of bolts needed by the corresponding steel type is referenced in Eurocode 3.Then,the bearing capacity of the joint can be calculated.The joint-bolt-AVOA model is established by substituting the bolt number required by the steel into the algorithm to obtain the optimal bolt number required while ensuring joint stability.The results show that the number of bolts required by the joint-bolt-AVOA model based on the stability of steel is lower than that calculated by Eurocode 3.Therefore,AVOA can effectively optimize the number of bolts needed in building connections and save resources.展开更多
摘要针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble Empirical Mode Decomposition with Adaptive Noise,CEEMDAN)将故障电弧电流分解为不同本征模态函数分量并对其提取多尺度模糊熵、时域、频域组合特征。最后设计秃鹰搜索-随机森林算法(Bald Eagle Search and Random Forest,BES-RF)进行电弧故障检测,结果表明:检测准确率达98.05%,相比传统分解方法与检测算法准确率提高3.5%、4.7%,验证该方法的有效性。
摘要The joint-bolt-African Vulture optimization algorithm(AVOA)model is proposed for the design of building connections to improve the stability of steel beam-to-column connections.For this algorithm,the type of steel is first determined,and the number of bolts needed by the corresponding steel type is referenced in Eurocode 3.Then,the bearing capacity of the joint can be calculated.The joint-bolt-AVOA model is established by substituting the bolt number required by the steel into the algorithm to obtain the optimal bolt number required while ensuring joint stability.The results show that the number of bolts required by the joint-bolt-AVOA model based on the stability of steel is lower than that calculated by Eurocode 3.Therefore,AVOA can effectively optimize the number of bolts needed in building connections and save resources.