Aiming at the nonlinear and non-stationary vibration of planetary gearbox and the weak fault characteristic signal,the quantum theory was introduced into the calculation of information entropy,and a new feature extraction method,nonlinear quantum information entropy,was proposed.According to the basic concept of quantum theory,the multi-qubit system of vibration signal was established,the feasibility of introducing quantum theory into information entropy was analyzed,and the basic principle of nonlinear quantum information entropy was proposed.The nonlinear quantum information entropy of vibration simulation signals in three states of planetary gearbox was analyzed,and the feasibility of using quantum information entropy as the characteristic of planetary gearbox was illustrated.Finally,the nonlinear quantum information entropy of the five kinds of state signals collected by the planetary gearbox fault test bed was calculated and compared with the results of time-frequency entropy and sample entropy.The results show that nonlinear quantum information entropy can effectively extract the operating state characteristics of planetary gearbox.
Key words
quantum theory /
nonlinear quantum entropy /
simulation analysis /
planetary gearboxes /
feature extraction
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