为解决智能设备中的偏心转子马达故障检测准确性与效率低下等问题,提出一种基于小波包与长短时记忆网络(Wavelet Packet-Long Short Term Memory,WP-LSTM)的故障诊断方法。首先,将偏心转子马达的电压信号进行小波包分解,对高频信号进行...为解决智能设备中的偏心转子马达故障检测准确性与效率低下等问题,提出一种基于小波包与长短时记忆网络(Wavelet Packet-Long Short Term Memory,WP-LSTM)的故障诊断方法。首先,将偏心转子马达的电压信号进行小波包分解,对高频信号进行重构。其次,将重构信号作为特征向量输入到3层LSTM网络中,依靠LSTM网络的记忆特性充分学习非稳态信号中具有时序性的故障特征信息,再利用模型诊断出马达断线、卷线、电刷不良和接触不良故障。最后,通过实验验证了所提方法的可行性,且准确率高达98.91%。与现有的马达故障诊断方法相比,基于WP-LSTM的诊断方法具有更好的诊断效果,对提高故障诊断的准确率有一定的作用。展开更多
Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The functio...Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The function of this neck hinge for controlling processive movement,however,remains unclear.Methods We made a series of modifications to the neck hinges of KIF13B and KIF1A and tested their movement using a single-molecule motility assay.Results In KIF13B,the insertion of flexible residues before or after the proline differentially impacts the processivity or velocity,while the removal of this proline increases the both.In KIF1A,the deletion of entire flexible neck hinge merely enhances the processivity.The engineering of these hinge-truncated necks of kinesin-3 into kinesin-1 similarly boosts the processive movement of kinesin-1.Conclusion The neck hinge in kinesin-3 controls its processive movement and proper modifications tune the motor motility,which provides a novel strategy to reshape the processive movement of kinesin motors.展开更多
文摘为解决智能设备中的偏心转子马达故障检测准确性与效率低下等问题,提出一种基于小波包与长短时记忆网络(Wavelet Packet-Long Short Term Memory,WP-LSTM)的故障诊断方法。首先,将偏心转子马达的电压信号进行小波包分解,对高频信号进行重构。其次,将重构信号作为特征向量输入到3层LSTM网络中,依靠LSTM网络的记忆特性充分学习非稳态信号中具有时序性的故障特征信息,再利用模型诊断出马达断线、卷线、电刷不良和接触不良故障。最后,通过实验验证了所提方法的可行性,且准确率高达98.91%。与现有的马达故障诊断方法相比,基于WP-LSTM的诊断方法具有更好的诊断效果,对提高故障诊断的准确率有一定的作用。
文摘Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The function of this neck hinge for controlling processive movement,however,remains unclear.Methods We made a series of modifications to the neck hinges of KIF13B and KIF1A and tested their movement using a single-molecule motility assay.Results In KIF13B,the insertion of flexible residues before or after the proline differentially impacts the processivity or velocity,while the removal of this proline increases the both.In KIF1A,the deletion of entire flexible neck hinge merely enhances the processivity.The engineering of these hinge-truncated necks of kinesin-3 into kinesin-1 similarly boosts the processive movement of kinesin-1.Conclusion The neck hinge in kinesin-3 controls its processive movement and proper modifications tune the motor motility,which provides a novel strategy to reshape the processive movement of kinesin motors.
