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진동 신호의 방향 파워 스펙트럼을 이용한 엔진의 이상 폭팔 진단
이종원(Chong-WonLee),한윤식(Yun-Sik Han),한우섭(Woo-Sup Han) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A new signal processing technique is applied to four-cylinder compression ignition engine for the diagnosis of power faults inside the cylinders. This technique utilizes two-sided directional power spectra (dPS) of complex vibration signals measured from engine blocks as the patterns for engine cylinder power faults. The dPSs feature that they give not only the frequency contents but also the directivity of the engine block motion. For the automatic detection / diagnosis of cylinder power faults, pattern recognition method using multi-layer neural networks is employed. Experimental results show that the success rate for diagnosis of cylinder power faults using dPSs is higher than that using the conventional one-sided power spectra. The proposed technique is also tested to check the robustness In the sensor position and the engine rotational speed.<br/>