CAJ | 학술논문

针对高速旋转机械转子发生早期动静碰摩故障时主要为转子工频成份及转子与支撑间碰摩所致瞬态冲击信号成份，据可调品质因子小波变换对信号品质因子定义为转子工频成份为高品质因子信号、转子动静碰摩所致瞬态冲击信号为低品质因子信号，分别构建高、低品质因子小波变换基函数实现转子早期动静碰摩信号工频成份与瞬态冲击成份有效分离，对碰摩故障进行模式识别。通过仿真信号及转子碰摩实验信号验证可调品质因子小波变换在转子早期碰摩故障诊断中的有效性。
침대고속선전궤계전자발생조기동정팽마고장시주요위전자공빈성빈급전자여지탱간팽마소치순태충격신호성빈，거가조품질인자소파변환대신호품질인자정의위전자공빈성빈위고품질인자신호、전자동정팽마소치순태충격신호위저품질인자신호，분별구건고、저품질인자소파변환기함수실현전자조기동정팽마신호공빈성빈여순태충격성빈유효분리，대팽마고장진행모식식별。통과방진신호급전자팽마실험신호험증가조품질인자소파변환재전자조기팽마고장진단중적유효성。
When an early rub-impact occurs in a rotor system,its vibration signal is mainly composed of a periodic component with rotor rotating frequency and transient impulse signal components caused by rub-impact between the rotor and bearings.The periodic component with rotor rotating frequency can be defined as a signal with a higher Q-Factor and the transient impulse signal components can be defined as the signals with a lower Q-Factor based on the theory of tunable Q-Factor wavelet transformation.Here,two tunable Q-Factor wavelet transformation basis functions were constructed with a higher Q-Factor value and a lower Q-Factor value,respectively.An early rub-impact vibration signal was separated into two main components successfully using the constructed tunable Q-Factor wavelet transformation basis functions.At last, the feasibility and effectiveness of the tunable Q-Factor method for fault diagnosis of rub-impact in a rotor system were verified with simulations and tests.