期刊
IEEE ACCESS
卷 6, 期 -, 页码 10867-10877出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2017.2785406
关键词
Bio-inspired vibration sensor; real-time measurement of absolute motion; vibration-based fault detection
资金
- General Research Fund Project of Research Grants Council of Hong Kong [15206717]
- National Natural Science Foundation of China [61374041, 61673133]
- Hong Kong Polytechnic University
A novel vibration sensor based on a bio-inspired nonlinear structure with quasi-zero stiffness characteristic is developed for the real-time measurement of absolute vibration motion. With this bio-inspired vibration sensor, the problems of error accumulation and real-time performance induced by traditional measurement method using accelerometer can be effectively eliminated. In order to construct a comparatively exact model of the bio-inspired vibration sensor, an adaptive compensation method is applied to the estimation of the structure parameter. Through taking full advantage of the bio-inspired vibration sensor in real-time measurement of absolute vibration motion, a model-based fault detection algorithm is proposed to cope with the real-time detection problem of weak fault with fast time-varying characteristic which cannot be exactly identified by existing frequency-based and wavelet-based fault detection methods. Theoretical analysis and experimental results demonstrate that the fault detection algorithm based on this bio-inspired vibration sensor is effective and efficient, compared with the existing ones and thus has a great potential in many real practical applications.
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