نتایج جستجو برای: bearing fault

تعداد نتایج: 137115  

2016
Junhong Zhang Wenpeng Ma Jiewei Lin Liang Ma Xiaojie Jia

In order to achieve accurate diagnosis for rotating machinery automatically and considering that test data under actual fault conditions are rather difficult to obtain, a novel fault diagnosis strategy based on rotor dynamics and computational intelligence was proposed in this paper. Considering the nonlinear restoring force of ball bearing, the dynamic equation of a rotor–bearing system contai...

Journal: :IEEE Access 2023

Bearing failures are the most frequent causes of breakdowns in rotating machinery. Different levels severity these exhibit distinct fault characteristics vibration signal. This paper presents a bearing diagnosis method that considers different levels, involving selection statistics detection index symptom parameter and application canonical discriminant analysis (CDA). Initially, kurtosis is em...

Journal: :journal of structural engineering and geo-techniques 2015
beytollah taromi kiarash nasserasadi asghar vatanioskouei

seismic base isolation are devices that used to limit the human and material damage caused by an earthquake. this devices diffuse the energy induced at the time of the earthquake before being transferred to the structure.the base isolated structures when subjected to the near-fault eathquakes which contain long-period velocity pulses that may coincide with the period of base isolated structures...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده برق و کامپیوتر 1388

با توجه به این که در سیستم های صنعتی وقوع fault ممکن است منجر به خرابی کالا، خرابی دستگاه، افت عملکرد و یا تلفات جانی شود، شناسایی و تشخیص به موقع fault و همچنین جبران سازی آن از اهمیت کاربردی بسیار بالایی برخوردار می باشد. عمده ی سیستم های صنعتی را سیستم های غیر خطی و هایبرید با ورودی ها یا حالت های ناهمگون تشکیل می دهند. بنابراین شناسایی fault در این سیستم ها و تلاش برای جبران اثرات آن به کمک...

2016
Elena Spagnuolo Oliver Plümper Marie Violay Andrea Cavallo Giulio Di Toro

Earthquakes are the result of slip along faults and are due to the decrease of rock frictional strength (dynamic weakening) with increasing slip and slip rate. Friction experiments simulating the abrupt accelerations (>>10 m/s2), slip rates (~1 m/s), and normal stresses (>>10 MPa) expected at the passage of the earthquake rupture along the front of fault patches, measured large fault dynamic we...

2013
L. A. Wulandhari H. Haron

Bearing is a component that affects the performance of a rotating machine in order to be used properly. The purpose of using ball bearing is to reduce rotational friction and support radial and axial loads. Diagnosis of bearing vibration data is an important process to identify either the bearing is normal or defect. In this paper, we consider a single bearing system that consists of one normal...

2016
Dean Lee Vincent Siu Rick Cruz Charles Yetman

There has been immense success on the application of Convolutional Neural Nets (CNN) to image and acoustic data analysis. In this paper, rather than preprocessing vibration signals to denoise or extract features, we investigate the usage of CNNs on raw signals; in particular, we test the accuracy of CNNs as classifiers on bearing fault data, by varying the configurations of the CNN from one-lay...

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