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| Performance degradation trend prediction method for rotating machinery based on QWGRUNN |
| LI Feng1, XIANG Wang1,WANG Jiaxu2,TANG Baoping3 |
1.School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China；
2.School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China;
3.State Key Lab of Mechanical Transmission, Chongqing University, Chongqing 400044, China |
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Abstract A novel performance degradation trend prediction method of rotating machinery was proposed based on the quantum weighted gated recurrent unit neural network (QWGRUNN).Firstly, the performance degradation index set for rotating machinery was constructed by using the wavelet denoise-permutation entropy method.Then, this index set was input in to QWGRUNN to accomplish the performance degradation trend prediction of rotating machinery.On the basis of gated recurrent unit (GRU), qubits were introduced in QWGRUNN to represent network weights and activity values, quantum phase-shift gates were constructed to update weight-qubits and activity-qubits, and improve the network generalization capacity and the performance degradation trend prediction accuracy of the proposed method.Finally, the dynamic learning parameter appropriate to the structure of QWGRUNN was adopted to improve the network convergence speed and the computation efficiency of the proposed method.The example of performance degradation trend prediction for rolling bearing verified the effectiveness of the proposed method.
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Received: 22 June 2017
Published: 28 December 2018
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