Abstract:At present, when optimizing the position of a sensor, there is little research on whether the possible fault signal of a gearbox can be identified and separated.In this work, the fault diagnosability was applied to the optimal sensors placement of a gear box, and the different placement schemes were evaluated by using the comprehensive index composed of three evaluation criteria: singular value ratio, fault diagnosability, and average acceleration amplitude, and the optimal sensor placement scheme was determined.Firstly, the modal analysis of the gearbox was carried out to extract the modal modes, and then the K-means clustering algorithm was used to classify the dynamic similarity of shape modes of degrees of freedom at important modes.Secondly, the effective independent average acceleration amplitude method was used to select the initial measuring points.Then, the possible fault signals were measured at the positions of these nodes, and the corresponding fault spectrum was obtained by the fast Fourier transform.The density function of the corresponding fault was obtained by using the Kernel density estimation, and then the fault diagnosability at each position was judged by Kullback-Leibler divergence.Finally, the comprehensive index was used to evaluate the optimal scheme.The feasibility of the proposed method was verified on the ZDH10 gearbox fault diagnosis setup.
彭珍瑞,刘臻. 基于故障可诊断性的齿轮箱传感器优化布置[J]. 振动与冲击, 2021, 40(4): 155-163.
PENG Zhenrui,LIU Zhen. Optimal sensor placement of a gear box based on fault diagnosability. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(4): 155-163.
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