基于改进动态时间规整的直流电动机驱动负荷开关卡涩故障辨识OA
Identification of DC motor driven load switch jamming fault based on improved dynamic time warping
负荷开关在动作过程中可能会发生卡涩现象,其储能电动机电流形态能有效反映开关的机械状态.因此,本文提出一种基于改进动态时间规整(IDTW)的负荷开关卡涩故障检测方法.首先,利用滑动均值滤波实时处理电动机电流信号,滤除干扰信号.其次,制定动作电流的录波启动和停止判据,以确保记录完整的电动机动作电流.随后,通过距离公式调整、算法加速和存储空间优化对动态时间规整(DTW)进行改进.以开关正常状态的电流信号为标准波形,利用IDTW计算对比波形与标准波形的标准化距离,并制定边界阈值实现对开关状态的辨识.最后,设计一套在线诊断终端,实现所提算法的工程化.实验结果表明,所提方法具有较强的适应性,对两种型号的负荷开关均能实现正确录波,辨识准确率分别达到 99%和 99.37%,所设计的在线诊断终端能够在较短时间内完成对负荷开关卡涩状态的辨识.
The load switch may experience jamming during operation,and the current pattern of its energy storage motor can effectively reflect the mechanical state of the switch.Therefore,this paper proposes a fault detection method for load switch jamming based on improved dynamic time warping(IDTW).Firstly,the motor current signal is processed in real time using sliding mean filtering to filter out interfering signals.Secondly,the start and stop criteria for action current recording are formulated to ensure that the complete motor action current is recorded.Thirdly,the dynamic time warping(DTW)is improved by distance formula adjustment,algorithm acceleration and storage space optimization.Taking the current signal of the normal state of the switch as the standard waveform,the IDTW is used to calculate the standardized distance between the comparison waveform and the standard waveform,of which the boundary threshold is formulated to realize the identification of the switch state.Finally,a set of online diagnostic terminals is designed to realize the engineering of the proposed algorithm.The experimental results show that the proposed method has strong adaptability,and the identification accuracy of two types of load switches can reach 99%and 99.37%respectively.The designed on-line diagnosis terminal can complete the identification of the load switch jamming state in a short time.
黄海燕;高伟;邱仕达;杨耿杰
福州大学电气工程与自动化学院,福州 350108国网福建省电力有限公司龙岩供电公司,福建 龙岩 362300
负荷开关卡涩故障动态时间规整(DTW)存储空间优化工程化实现
load switchjamming faultdynamic time warping(DTW)storage space optimizationengineering realization
《电气技术》 2024 (006)
31-38,55 / 9
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