| 1. | Partial failure : ensure that running out of memory always leaves the system in a safe state
局部故障：确保内存溢出时，系统总是处于安全状态。 |
| 2. | In addition , the location of failed tooth can be indicated in terms of the position of the segment that deviates from normal segments
在齿轮故障诊断中， wigner - ville分布不但可以判断局部故障的有无，且可监测局部故障的发展趋势。 |
| 3. | This paper has made the following researches on the application of wavelet analysis to local fault diagnosis for gear ; 1
本学位论文主要针对齿轮局部故障，研究了小波分析在齿轮故障诊断中的应用，主要进行了以下几个方面的工作： 1 |
| 4. | 5 . a study is made on the energy spectrum estimation approach based on gaussian - chirplet - transform , which is superior to conventional power spectrum estimation in local fault diagnosis for gear
利用高斯线调频小波变换作信号的谱估计，比经典的自功率谱估计在齿轮局部故障诊断中取得了更好的效果。 |
| 5. | Experimental results show these proposed methods , which can protrude the sideband structure of gear , are practical in gear fault diagnosis and of application and more thorough research value
实验数据的分析结果表明这些方法可突出齿轮的边频带结构，适用于齿轮的局部故障诊断，具有一定的应用价值和更深入的研究价值。 |
| 6. | During diagnosis , the fdes based on rule inferece is first used to detect up - level missile fauls , and then the fdes based on inn is applied to make further diagnosis according to the missile control system where knowledge for diagnosis is scarce
在诊断中，首先利用基于规则推理的故障诊断专家系统对一些浅层的导弹系统故障进行诊断，然后利用基于集成神经网络的故障诊断专家系统对某些局部故障，如导弹稳定控制系统的故障作进一步诊断。 |
| 7. | The results of emulation and practical technical application indicate that time sequence components observed by empirical mode decomposition algorithm and frequency spec trum of them can reflect partial failure signature of gear adequately , at the same time , the weak signal feature can be easily extracted from them
仿真研究及实际工程应用表明，采用经验模式分解算法后得到的时序分量及其频谱能够很好地体现齿轮局部故障特征，具有很强的弱信号特征提取能力。 |
| 8. | Due to the unsteadiness of the vibration signal , conventional methods of gear fault diagnosis based on steady signal processing , which consist of time domain and frequency domain analysis method , are not as effective to local defect as to dispersed defect of gear
传统的齿轮故障诊断方法（包括频域分析方法和时域分析方法）对于齿轮的分布故障有很好的诊断效果。但当齿轮产生局部故障时，失效的轮齿间断地进入啮合，产生冲击振动，使得齿轮振动信号包含了非平稳或时变成分。 |
| 9. | The effectiveness of this method is confirmed by simulated data and experimental data . moreover , the faults on the outer ring , inner ring and rolling element can be recognized by the time - delayed correlation demodulation . moreover , the time - frequency analysis methods , wigner - ville distribution and wavelet transform , are studied in this paper
结果表明：连续小波变换( cwt )可以诊断齿轮局部故障，但是其计算耗时，不宜用于实时诊断；离散小波变换( dwt )可以诊断滚动轴承故障，且可分辨轴承内环故障、外环故障及滚珠故障。 |
