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机械设备的早期故障检测是当前自动化设备高效运行的技术保障.由于各种故障具有突发性、瞬变性的特点,因此传统以傅里叶变换为基础的信号处理方法不能满足这种瞬变信号的需要.本文探讨局域波时-频分析技术,从信号去噪、信号奇异性检测、信号频带能量分布等方面分析分析、提取瞬变信号的特征,并以电机轴承故障为例,验证该方法的有效性. 相似文献
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机械设备的早期故障检测是当前自动化设备高效运行的技术保障.由于各种故障具有突发性、瞬变性的特点,因此传统以傅里叶变换为基础的信号处理方法不能满足这种瞬变信号的需要.本文探讨局域波时一频分析技术,从信号去噪、信号奇异性检测、信号频带能量分布等方面分析分析、提取瞬变信号的特征,并以电机轴承故障为例,验证该方法的有效性. 相似文献
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A multi-try counter-meshing gears stronglink based on micro electromechanical system (MEMS) technology is introduced, including research, design, couple and fabrication of unique signal (UQS) for some specified fields of information security. The stronglink consists of two groups of metal counter-meshing gears, two pawl/ratchet mechanisms, two driving micromotors and two resetting micromotors. The resetting micromotors make counter-meshing gears withdraw by raising pawls so that the interfered counter-meshing gears will be relieved. The energy-coupling element is a photoelectric sensor with a circular notched plate. The counter-meshing mechanism is fabricated using the ultraviolet-lithographie, galvanoformung and abformung (UV-LiGA) process and a precision mechanical technique. The stronglink can be tried several times if the correct resetting code is known. 相似文献
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