论文部分内容阅读
行星传动轮系是直升机传动系统的核心部件,是直升机健康和使用监测系统(HUMS)重要的监测对象。直升机行星传动轮系具有结构复杂紧凑、组件繁多、工况瞬时多变以及使用环境恶劣等特点,导致直升机行星传动轮系振动信号污染严重、成分复杂,具有较强的非平稳性和耦合调制特征。另外复杂的故障模式、较少的故障样本,也都增加了直升机行星传动轮系故障诊断的难度。面对这些难题,研究人员在基于信号降噪与信号分离、时频分析与解耦解调、数学建模与模式识别的故障诊断技术上取得了丰硕的成果。面对仍然存在的一些亟待研究和解决的问题,提出了直升机行星传动轮系故障诊断技术的研究方向以及未来的发展趋势。
Planetary transmission train wheels are the core components of helicopter transmission system and are an important monitoring object of helicopter health and usage monitoring system (HUMS). Helicopter planetary gear train has the characteristics of complex and compact structure, numerous components, transient changes in working conditions and poor use environment, resulting in serious pollution of helicopter planetary gear train vibration signals, complex composition, strong non-stationary and coupling modulation characteristics . In addition, complicated fault modes and fewer fault samples also increase the difficulty of fault diagnosis of helicopter planetary transmission train. Faced with these challenges, researchers have achieved fruitful results in fault diagnosis based on signal noise reduction and signal separation, time-frequency analysis and decoupling demodulation, mathematical modeling and pattern recognition. In the face of some problems that still need to be researched and solved, the research direction of helicopter planetary transmission gear train fault diagnosis technology and the future development trend are put forward.