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针对滚动轴承故障特征信号因受传输路径和强噪声的干扰而导致周期性故障脉冲难以提取以及最大相关峭度解卷积(MCKD)参数依赖人为经验选择的问题,提出一种参数自适应MCKD的滚动轴承故障特征提取方法。以解卷积信号的包络谱熵作为适应度函数,利用麻雀搜索算法强大的全局搜索能力自适应地选择MKCD方法的最佳参数组合;利用参数优化后的MCKD方法对故障信号进行解卷积运算,滤除掉信号中的噪声,以突显由轴承故障激发的周期性故障脉冲;对解卷积信号进行包络解调,以提取出轴承故障特征频率成分。仿真结果表明,与遗传算法和粒子群算法相比,采用麻雀搜索算法可使MCKD参数在优化中具有更快的收敛速度和更强的稳定性。对滚动轴承进行全寿命周期实验及对工程案例的实验结果表明:所提方法能自适应提取强噪声中的轴承周期性故障脉冲成分,信号的峭度提高了3倍,鲁棒性更强;与直接谱分析和快速谱峭度方法相比,所提方法能完整提取信号中的故障特征频率成分,成功率可达100%
有效提高了滚动轴承的故障诊断精度。
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