公开(公告)号：US20160335548A1

公开(公告)日：2016-11-17

申请号：US15141197

申请日：2016-04-28

Applicant: ROLLS-ROYCE plc

Inventor： Chi-Keong GOH ,  Lim PIN ,  Tan KAY CHEN

IPC: G06N5/04 ,  G06N3/12

CPC classification number: G06N3/126 ,  G06N20/00

Abstract: A method for predicting fault occurrence in a mechanical system and an electrical system. The method comprises: receiving a first dataset of mechanical system condition data, the first dataset being imbalanced by having more data points in a first category than in a second category; generating a plurality of chromosomes from the second category data points in the first dataset; the plurality of chromosomes including information to enable the creation of new datasets; generating a second dataset using the plurality of chromosomes and an evolutionary algorithm, the second dataset being less imbalanced than the first dataset; and predicting fault occurrence in the mechanical system using the second dataset and a machine learning algorithm.

Abstract translation: 一种用于预测机械系统和电气系统中故障发生的方法。 该方法包括：接收机械系统条件数据的第一数据集，所述第一数据集通过在第一类别中具有比在第二类别中更多的数据点来实现不平衡; 从所述第一数据集中的所述第二类别数据点生成多个染色体; 所述多个染色体包括能够创建新数据集的信息; 使用所述多个染色体生成第二数据集和进化算法，所述第二数据集比所述第一数据集更不平衡; 并使用第二数据集和机器学习算法预测机械系统中的故障发生。

公开(公告)号：US20170017741A1

公开(公告)日：2017-01-19

申请号：US15202832

申请日：2016-07-06

Applicant: ROLLS-ROYCE plc

Inventor： Chi Wan LIM ,  Xiaofeng YIN ,  Tianyou ZHANG ,  Yi SU ,  Chi-Keong GOH ,  Shahrokh SHAHPAR ,  Alejandro MORENO

IPC: G06F17/50

CPC classification number: G06F17/5018 ,  G06T17/20

Abstract: A computational engineering modelling tool having a point generation module arranged to read geometry data representing a domain to be modelled. The point generation module also generates point data for the domain having multiple boundary points located on a boundary of the domain and multiple further points spaced from the boundary within the domain. A point mutation module processes the point generation module output and generates automatically a plurality of alternative point data definitions for the domain in which the location of at least one point differs between each of the alternative point definitions. A blocking module discretizes the domain by creating multiple geometric blocks over the domain using a computational geometric operator wherein each point represents a vertex of at least one block. The blocking module outputs a discretized computational model of the domain and the tool scores the model according to a geometric attribute of the blocks.

Abstract translation: 一种计算工程建模工具，其具有布置成读取表示要建模的域的几何数据的点生成模块。 点生成模块还生成具有位于域的边界上的多个边界点的域的点数据，以及与域内的边界间隔开的多个另外的点。 点突变模块处理点生成模块输出并自动生成针对至少一个点的位置在每个替代点定义之间不同的域的多个备选点数据定义。 阻塞模块通过使用计算几何算子在域上创建多个几何块来离散域，其中每个点表示至少一个块的顶点。 阻塞模块输出域的离散计算模型，并且工具根据块的几何属性对模型进行评分。

公开(公告)号：US20160377504A1

公开(公告)日：2016-12-29

申请号：US15172637

申请日：2016-06-03

Applicant: ROLLS-ROYCE plc

Inventor： Yiping KE ,  Jian Cheng WONG ,  Chi-Keong GOH ,  Kee Khoon LEE

IPC: G01M10/00

CPC classification number: G01M10/00 ,  G06F17/5009

Abstract: A vortex detection method is described. The method comprises storing a plurality of points at locations over a region (32) in which vortex detection is to be performed. A value for each of a plurality of fluid flow parameters, such as velocity, pressure and density, is determined at each point. The points are grouped as being contained in either a vortical flow portion or non-vortical flow portion of the region according to one or more statistical distribution for said fluid flow parameters. A point (p) in a vortex core is identified according to the direction of motion of an array of further points (46) relative to said point in the vortex core. The further points (46) may surround the vortex core point.

Abstract translation: 描述了涡流检测方法。 该方法包括将多个点存储在要执行涡流检测的区域（32）上的位置处。 在每个点处确定多个流体流动参数中的每一个的值，例如速度，压力和密度。 根据所述流体流动参数的一个或多个统计分布，点被分组为包含在该区域的涡旋流部分或非涡旋流动部分中。 涡流芯中的点（p）根据涡流芯中的所述点的另外的点（46）的阵列的运动方向被识别。 另外的点（46）可围绕涡流心点。

公开(公告)号：US20160377462A1

公开(公告)日：2016-12-29

申请号：US15172820

申请日：2016-06-03

Applicant: ROLLS-ROYCE plc

Inventor： Yiping KE ,  Jian Cheng WONG ,  Chi-Keong GOH ,  Kee Khoon LEE

IPC: G01F1/32

CPC classification number: G01F1/3209 ,  G06F17/5009

Abstract: A flow feature detection method is described. The method includes storing a plurality of points at locations over a region in which vortex detection is to be performed. A value for each of a plurality of fluid flow parameters, such as velocity, pressure and density, is determined at each point. The points are grouped as being contained in either a flow feature portion or normal flow portion of the region according to one or more statistical distribution for the fluid flow parameters. A point is identified as being indicative of the flow feature by identifying multiple further points at least partially surrounding the point, and determining a plane in which the flow feature is identifiable based upon the relative values of the one or more fluid flow parameter for the further points. The method may be used to detect vortices and to identify a two-dimensional plane representative of a vortex.

Abstract translation: 描述流特征检测方法。 该方法包括在要执行涡流检测的区域上的位置处存储多个点。 在每个点处确定多个流体流动参数中的每一个的值，例如速度，压力和密度。 根据流体流动参数的一个或多个统计分布，点被分组为包含在区域的流动特征部分或正常流动部分中。 通过识别至少部分地围绕该点的多个另外的点，并且基于用于另外的一个或多个流体流动参数的相对值来确定流动特征可识别的平面，将点识别为指示流动特征 积分 该方法可用于检测涡流并识别代表涡流的二维平面。