基于量子遗传算法优化 RVM的滚动轴承智能故障诊断

摘要

提出了基于量子遗传算法（QGA）优化相关向量机（RVM）核函数参数的方法，通过仿真比较了量子遗传算法与其它方法在核函数参数优化方面的性能，结果表明基于量子遗传算法优化出的算法性能优于其它方法的优化性能。将基于量子遗传算法优化的相关向量机（QGA-RVM）应用于滚动轴承的故障诊断；采用总体平均经验模态分解（EE-MD）将滚动轴承故障信号自适应地分解成多个内禀模态函数（IMF），将 IMF 能量作为故障特征输入到 QGA-RVM进行最终的故障诊断。结果表明，该方法能够快速准确地诊断出滚动轴承故障，验证了该方法的有效性和稳定性；此外，通过与支持向量机（SVM）的对比分析，显示了 RVM在智能故障诊断应用中的优越性。%A novel method to optimize relevance vector machine (RVM)'s kernel function parameters based on the quantum genetic algorithm (QGA)was proposed.It was compared with other optimization algorithms with simulations. The results showed that the optimization method based on QGA is superior to other optimization methods.The model of RVM optimized with QGA (QGA-RVM)was applied in fault diagnosis of rolling bearings.Fault signals were decomposed adaptively into some intrinsic mode functions (IMFs)with the ensemble empirical mode decomposition (EEMD).The IMF energy as fault features was inputted into QGA-RVM for final fault diagnosis.Experimental results showed that the proposed method can diagnose rolling bearings'faults rapidly and accurately,its validity and stability are verified;moreover,the superiority of RVMin intelligent fault diagnosis is revealed through the comparative analysis between QGA-RVMand SVM.