基于压缩感知的滚动轴承故障信号提取技术研究

来源 :大连交通大学学报 | 被引量 : 0次 | 上传用户:qzx1986
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
针对目前奈奎斯特采样方式对信号进行采集所产生的数据量较大的问题,提出一种基于压缩感知并结合神经网络的滚动轴承故障信号检测方法,通过K-奇异值分解算法构造冗余字典,利用神经网络以映射后观测矩阵的前一部分值预测全部观测值,实现信号的二次压缩,最终利用子空间追踪算法基于预测出的观测矩阵对信号进行重构,通过重构信号频谱可获得轴承故障信息.经过对测量矩阵、算法参数及神经网络等内容的分析,可在较少的数据量下以较高精度实现对滚动轴承故障信息的提取,并通过仿真对比实验证明了方法的有效性,在总压缩比为0.72~0.92时,
其他文献
Age estimation plays an important role in human-computer interaction system.The lack of large number of facial images with definite age label makes age estimation al-gorithms inefficient.Deep label distribution learning(DLDL)which employs convolutional ne
Physical aging is currently a major obstacle for the commercialization of PIM-1 membranes for gas separation applications.A well-known approach to rever-sing ph
为了提高我国城轨车辆制造效率、降低制造成本,提出了城轨车辆混流双边装配线平衡问题研究.首先建立了以最小化成对工位数和最小化总工位数、装配线负荷均衡为目标的数学模型,然后研究了基于改进混合粒子群算法的求解方法,最后将该方法应用于企业实际装配线,通过仿真分析验证了该方法的有效性.
Emerging byte-addressable non-volatile memory(NVM)technologies offer higher density and lower cost than DRAM,at the expense of lower performance and limited write endurance.There have been many studies on hybrid NVM/DRAM memory management in a single phys
Membrane-based separation technologies have received increasing attention attributing to lots of advantages such as the low energy consumption,easy operation,an
期刊
With the advent of new computing paradigms,parallel file systems serve not only traditional scientific computing applications but also non-scientific computing applications,such as financial computing,business,and public administration.Parallel file syste
The widespread fake news in social networks is posing threats to social stability,economic development,and political democracy,etc.Numerous studies have explored the effective detection approaches of online fake news,while few works study the intrinsic pr
Saccharide production is critical to the devel-opment of biotechnology in the field of food and biofuel.The extraction of saccharide from biomass-based hydro-ly
Industry and academia have been making great ef-forts in improving refresh rates and resolutions of display de-vices to meet the ever increasing needs of consum
A sequent is a pair(Γ,△),which is true under an as-signment if either some formula in Γ is false,or some formula in △ is true.In L3-valued propositional log