【摘要】 针对航空发动机失稳时的重要表征——喘振信号开展检测、判别和处理方法的研究。通过失稳信号处理器实时获取压气机压力脉动数据,采用时域诊断分析方法完成对失稳信号的在线检测和预警。经压缩部件台架试验验证,失稳信号处理器能成功分离出喘振状态下的失稳信号特征,实现对失稳信号较为准确的捕获,采用的失稳判定方法有效。研究结果表明:失稳特征信号的实时、准确甄别,是发动机失稳主动控制的先决条件,提高失稳特征信号判别的正确率,可有效避免发动机失稳过程中信号的误判、漏判。更多还原

【Abstract】 For the surge signal,an important instability characteristic of aero-engine,detection,identifica tion and processing method research were carried out.Real time pressure data of compressor was obtained by instable signal processor and online detection and pre-warning were accomplished by time domain diag nosis method.Bench test of compression components validated that signal processor successfully captured the instable signal and differentiated the characteristics with effective method.The results show that the ac curate discrimination of real-time instable signal is the precondition for active control and the improvement of discrimination accuracy could effectively avoid the misjudgment or pretermission of signal.更多还原