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基于混沌-分形理論的往復(fù)式活塞隔膜泵磨損故障分
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Fault Diagnosis of Reciprocating Membrane Pump Based on Chaos and Fractal Theory
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    摘要:

    針對(duì)往復(fù)式活塞隔膜泵磨損故障，采用混沌理論和分形技術(shù)，對(duì)隔膜泵不同連接處磨損時(shí)的系統(tǒng)非線性表現(xiàn)形式加以研究。通過(guò)對(duì)不同故障類型振動(dòng)信號(hào)的分析，繪制了相應(yīng)的龐加萊截面圖，并計(jì)算了各種磨損故障的最大李雅普諾夫指數(shù)和關(guān)聯(lián)維數(shù)。研究表明當(dāng)沒(méi)有磨損故障時(shí)，系統(tǒng)為準(zhǔn)周期態(tài)；而隔膜泵的各種磨損故障信號(hào)呈現(xiàn)混沌性態(tài)，且不同故障狀態(tài)的最大李雅普諾夫指數(shù)和關(guān)聯(lián)維數(shù)有著較大的差別，可以用作其狀態(tài)監(jiān)測(cè)和故障診斷的特征參數(shù)。

    Abstract:

    The non-linear behaviour for wearing fault of reciprocating membrane pump was investigated with chaos theory and fractal technology. The vibration acceleration signals of the wearing in different joint were collected to analyse. Poincare sections were drew to study the status of the system. Correlation dimension and the largest Lyapunov exponent were calculated to recognize the different wearing. The results showed that non-abrasion pump system is in quasi-period state, while the fault status is in chaos. The research also indicated that different wearing fault has different largest Lyapunov exponent and different correlation dimension, which can be used as the characteristics for the pump’s monitoring and fault diagnosis.

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史麗晨,段志善.基于混沌-分形理論的往復(fù)式活塞隔膜泵磨損故障分[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(4):222-226. Fault Diagnosis of Reciprocating Membrane Pump Based on Chaos and Fractal Theory[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(4):222-226.

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