机械故障模拟器（MFS）数据集，感应电机故障数据库

1.1.Introduction 该数据库由SpectraQuest的机械故障模拟器（MFS）校准平衡振动（ABVT）上的传感器采集的1951个多变量时间序列组成。1951包括六种不同的模拟状态：正常功能、不平衡故障、水平和垂直错位故障以及内外轴承故障。本节介绍数据库。 The used SpectraQuest Inc. Alignment/Balance Vibration Trainer (ABVT) Machinery Fault Simulator (MFS). Each sequence was generated at a 50 kHz sampling rate during 5 s, totaling 250.000 samples. Below its a summary of each type of sequence: There are 49 sequences without any fault, each with a fixed rotation speed within the range from 737 rpm to 3686 rpm with steps of approximately 60 rpm. Simulated with load values within the range from 6 g to 35 g. For each load value below 30 g, the rotation frequency assumed in the same 49 values employed in the normal operation case. For loads equal to or above 30 g, however, the resulting vibration makes impracticable for the system to achieve rotation frequencies above 3300 rpm, limiting the number of distinct rotation frequencies. The table below presents the number of sequences per weight. This type of fault was induced into the MFS by shifting the motor shaft horizontally of 0.5 mm, 1.0 mm, 1.5 mm, and 2.0 mm. Using the same range for the rotation frequency as in the normal operation for each horizontal shift, the table below presents the number of sequences per degree of misalignment. This type of fault was induced into the MFS by shifting the motor shaft horizontally of 0.51 mm, 0.63 mm, 1.27 mm, 1.40 mm, 17.8 mm and 1.90 mm. Using the same range for the rotation frequency as in the normal operation for each vertical shift, the table below presents the number of sequences per degree of misalignment. As one of the most complex elements of the machine, the rolling bearings are the most susceptible elements to fault occurrence. The ABVT manufacturer provided three defective bearing, each one with a distinct defective element (outer track, rolling elements, and inner track), that were placed one at a time in two different positions in the MFS experimental stand: between the rotor and the motor (underhang position), or in the external position, having the rotor between the bearing and the motor (overhang position). Bearing faults are practically imperceptible when there is no imbalance. So, three masses of 6 g, 20 g, and 35 g were added to induce a detectable effect, with different rotation frequencies as before. The table below presents the underhang cases with outer track faults. The table below presents the underhang cases with rolling elements faults. The table below presents the underhang cases with inner track faults. The underhang has a total of 558 sequences. The table below presents the overhang cases with outer track faults. The table below presents the overhang cases with rolling elements faults. The table below presents the overhang cases with inner track faults. The overhang sequences totaling 513.

1.1. 引言
本数据库包含1951条多变量时间序列，均由SpectraQuest公司的机械故障模拟器（Machinery Fault Simulator, MFS）校准平衡振动训练器（Alignment/Balance Vibration Trainer, ABVT）上的传感器采集得到。该数据集涵盖六种典型模拟工况：正常运行状态、不平衡故障、水平错位故障、垂直错位故障，以及轴承内圈与外圈故障。本节将对该数据库进行介绍。
本次实验采用的设备为SpectraQuest公司的校准平衡振动训练器（ABVT）与机械故障模拟器（MFS）。每条时间序列以50 kHz的采样率采集，时长为5秒，总计包含250000个采样点。下文为各类序列的概要说明：
无故障正常工况共49条，转速固定在737 rpm至3686 rpm区间内，步长约为60 rpm，负载取值范围为6 g至35 g。对于负载小于30 g的工况，转速取值与正常工况的49组转速完全一致；而当负载大于等于30 g时，系统振动过强导致无法实现3300 rpm以上的转速，因此可选用的不同转速数量受限。下表列出了不同负载对应的序列数量。
水平错位故障通过将电机轴分别偏移0.5 mm、1.0 mm、1.5 mm与2.0 mm模拟得到。针对每种水平偏移量，转速取值范围与正常工况一致，下表列出了不同错位程度对应的序列数量。
垂直错位故障通过将电机轴分别偏移0.51 mm、0.63 mm、1.27 mm、1.40 mm、17.8 mm与1.90 mm模拟得到。针对每种垂直偏移量，转速取值范围与正常工况一致，下表列出了不同错位程度对应的序列数量。
作为机械系统中最复杂的组件之一，滚动轴承是最易发生故障的部件。ABVT制造商提供了三款带有不同缺陷的轴承，分别对应外圈（outer track）故障、滚动体（rolling elements）故障与内圈（inner track）故障。将缺陷轴承分别安装在MFS实验台的两种安装位置：一是转子与电机之间的悬挂内侧位置（underhang position），二是转子位于轴承与电机之间的悬挂外侧位置（overhang position）。
若无附加不平衡量，轴承故障几乎无法被检测到。因此分别添加6 g、20 g与35 g的配重以产生可被检测的振动信号，转速取值规则与前述工况一致。
下表分别列出了悬挂内侧位置的外圈故障、滚动体故障与内圈故障工况，该位置总计包含558条序列。
下表分别列出了悬挂外侧位置的外圈故障、滚动体故障与内圈故障工况，该位置总计包含513条序列。

搜集汇总

背景与挑战

背景概述

该数据集包含1951个多变量时间序列，模拟了感应电机的六种不同故障状态，采样率为50 kHz，每个序列持续5秒。数据集详细记录了不同故障类型的模拟参数和条件，适用于机械故障诊断和分析研究。