CAJ | 학술논문

以 JohnDeer 1 2 4 0 型拖拉机为研究对象,用快速傅里叶变换分析方法,分析了座椅的固有频率. 基于小波分析的方法,对轮式拖拉机整车振动信号进行了处理分析. 对采集到的拖拉机前桥、座椅、车体、后桥等处的振动信号进行了多级小波分解,从1 级、2 级小波分解的细节信号中,检测出了振动信号的奇异性,从5 级小波分解的逼近信号,得到了路面激励信号. 同时,分析了地面激励信号经拖拉机的传递方向和衰减程度. 研究为拖拉机减振研究和异常信号检测提供了借鉴.
이 JohnDeer 1 2 4 0 형타랍궤위연구대상,용쾌속부리협변환분석방법,분석료좌의적고유빈솔. 기우소파분석적방법,대륜식타랍궤정차진동신호진행료처리분석. 대채집도적타랍궤전교、좌의、차체、후교등처적진동신호진행료다급소파분해,종1 급、2 급소파분해적세절신호중,검측출료진동신호적기이성,종5 급소파분해적핍근신호,득도료로면격려신호. 동시,분석료지면격려신호경타랍궤적전체방향화쇠감정도. 연구위타랍궤감진연구화이상신호검측제공료차감.
In this paper , the research object is a Fukuda Europe tractor .The vibration characteristics of the seats under different speeds are discussed by using the method of FFT .Then , based on wavelet analysis , the vibration signal of the wheeled tractor is processed and analyzed .The collected vibration signals of the tractor front axle seat , rear axle , vehi-cle, etc.of multi-level wavelet decomposition .The singularity of the vibration signal is detected from the 1 level and 2 level wavelet decomposition .From the 5 level wavelet decomposition of the approximation signal , the road excitation sig-nal is obtained .The direction and the attenuation of the ground excitation signal are analyzed qualitatively and quantita -tively , which provides a basis for the study of the vibration reduction and the abnormal signal detection .