| 1. | Application of harmonic wavelet filter in the signal analysis of rotating machinery
谐波小波滤波在旋转机械信号分析中的应用 |
| 2. | Application of square demodulation analysis in fault diagnosis for mechanical signal
平方解调分析原理及在机械信号故障诊断中的应用 |
| 3. | Parameter collection interface circuit of vacuum circuit breaker is a vital important electrical interface
摘要真空断路器的参数采集接口电路是为主系统需要采集机械信号参量的重要的电接口。 |
| 4. | To extract incipient fault feature of mechanical signal , a new method to construct wavelet according to the fault characteristics is presented
摘要针对机械信号早期故障特徵的提取问题，提出了一种根据故障特徵波形的特点来构造相应小波的方法。 |
| 5. | The study results of the dissertation provide a new way to the faults analysis and diagnosis of rotating machine , especially to non - linear and non - stationary ' s
本文的研究成果将为旋转机械信号处理与故障诊断，尤其是为非线性和非稳态的故障分析与诊断给出了一条新的途径。 |
| 6. | The results demonstrate that for ica the correct preprocessing according to signal structure contributes to extracting features from mechanical signals effectively
研究结果表明，根据信号结构选择预处理的方法十分重要，正确的预处理可以使独立分量分析有效地提取机械信号中的特徵。 |
| 7. | Ferroelectric bulk ceramics have been widely used in many fields as sensor devices , and actuator devices because they can transfer the following information into each other : mechanical information , electronic information , thermal information , et al
铁电块材因其具有可将电信号、机械信号和热信号之间相互转换的特征而在通信、导航、精密测量、信息存储等领域得到广泛的应用。 |
| 8. | Its control precision must fit a certain extent standard . now , proportional hydraulic valve which developed from the general hydraulic valve is applied in ali kind of control scopes . it uses proportional electromagnetic iron to change the electron signal into mechanical signal instead of the manual adjuster or general switch electromagnetic iron
现在工业生产中得到广泛应用的比例液压阀多是在普通液压阀的基础上，采用廉价而可靠的比例电磁铁作为电-机转换元件，把电气控制信号转为机械信号，以代替原阀内的手动调节器或普通开关式电磁铁。 |
| 9. | The engineering result confirms that the proposed method is better than the other wavelet methods for matching fault feature of mechanical signal , and the weak impact - rub fault caused by the axis misalignment and rotor imbalance of a key rotating machine in an oil refinery are desirably extracted
工程振动信号分析表明，同其他类型的小波相比，用提升方法构造的小波能更好地匹配机械信号故障特徵波形，因此较理想地提取出了某炼油厂重催机组转子不平衡、轴系不对中和轻微碰摩的故障特徵。 |
| 10. | At last , the valid data based fast emd algorithm was proposed . chaper five aimed to the requirement of the emd based time - frequency analysis in the field of rotating machinery signal analysis and fault diagnosis . studied the method of rotatory speed prediction to improve the precision of complete period sampling of vibration signals in rotating machinery , then , discussed the phenomenon of mode fission in noise signal anlysis by emd and provided the filter method to weaken the phenomenon . after then , found a process to analysis the signals using emd - based method in the field of rotating machinery signal analysis and fault diagnosis
第五章针对旋转机械信号进行emd时频分析的要求，提出了提高整周期采样精度的预测算法和适合于单片机计算的近似公式；论述了模态裂解现象，并通过仿真信号和实际信号的研究，提出了使用滤波技术来减弱模态裂解现象的方法；给出了适合于旋转机械振动信号基于emd时频分析的工作步骤；研究了基于emd的旋转机械振动信号自适应滤波技术。 |
