Bifurcation and Chaos Analysis of a Relative Short Spherical Air Bearing System via a Novel Hybrid Method

2009 ◽  
Author(s):  
Cheng-Chi Wang ◽  
Her-Terng Yau ◽  
Chao-Lin Kuo
Keyword(s):  
Hybrid Method ◽  
Air Bearing ◽  
Bifurcation And Chaos ◽  
Chaos Analysis ◽  
Bearing System

scholarly journals Bifurcation and chaos analysis for a discrete ecological developmental systems

2021 ◽  
Author(s):  
Xiao-Wei Jiang ◽  
Chaoyang Chen ◽  
Xian-He Zhang ◽  
Ming Chi ◽  
Huaicheng Yan
Keyword(s):  
Developmental Systems ◽  
Bifurcation And Chaos ◽  
Chaos Analysis

scholarly journals Stability, Bifurcation and Chaos Analysis of Vector-Borne Disease Model with Application to Rift Valley Fever

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e108172 ◽  
Author(s):  
Sansao A. Pedro ◽  
Shirley Abelman ◽  
Frank T. Ndjomatchoua ◽  
Rosemary Sang ◽  
Henri E. Z. Tonnang
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
Disease Model ◽  
Bifurcation And Chaos ◽  
Valley Fever ◽  
Chaos Analysis ◽  
Vector Borne Disease ◽  
Vector Borne

scholarly journals Chaotic Behaviour Investigation of a Front Opposed-Hemispherical Spiral-Grooved Air Bearing System

2017 ◽  
Vol 2017 ◽  
pp. 1-18
Author(s):  
Cheng-Chi Wang
Keyword(s):  
High Speed ◽  
Critical Speed ◽  
Large Scale ◽  
Air Bearing ◽  
Severe Damage ◽  
Design Problems ◽  
Irregular Motion ◽  
Transformation Methods ◽  
Bearing Number ◽  
Bearing System

In recent years, spiral-grooved air bearing systems have attracted much attention and are especially useful in precision instruments and machines with spindles that rotate at high speed. Load support can be multidirectional and this type of bearing can also be very rigid. Studies show that some of the design problems encountered are dynamic and include critical speed, nonlinearity, gas film pressure, unbalanced rotors, and even poor design, all of which can result in the generation of chaotic aperiodic motion and instability under certain conditions. Such irregular motion on a large scale can cause severe damage to a machine or instrument. Therefore, understanding the conditions under which aperiodic behaviour and vibration arise is crucial for prevention. In this study, numerical analysis, including the Finite Difference and Differential Transformation Methods, is used to study these effects in detail in a front opposed-hemispherical spiral-grooved air bearing system. It was found that different rotor masses and bearing number could cause undesirable behaviour including periodic, subperiodic, quasi-periodic, and chaotic motion. The results obtained in this study can be used as a basis for future bearing system design and the prevention of instability.

Bifurcation and chaos analysis of a spur gear pair system with fractal gear backlash

2020 ◽  
pp. 110387
Author(s):  
Kang Huang ◽  
Zhenbang Cheng ◽  
Yangshou Xiong ◽  
Guangzhi Han ◽  
Luyang Li
Keyword(s):  
Spur Gear ◽  
Gear Pair ◽  
Bifurcation And Chaos ◽  
Chaos Analysis ◽  
Gear Backlash

Thermal Response of a Magneto-Resistive Head When it Flies Over an Asperity

1999 ◽  
Vol 121 (4) ◽  
pp. 975-979 ◽  
Author(s):  
Shuyu Zhang ◽  
David B. Bogy
Keyword(s):  
Small Area ◽  
Temperature Response ◽  
Thermal Response ◽  
Air Bearing ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model ◽  
Current Value ◽  
Head Temperature ◽  
Bearing System

A two-dimensional model is developed for the heat transfer in a magneto-resistive (MR) head-air bearing system. Using this model, the MR head temperature response is studied for various cases. It is found that the temperature in the head depends on the current through it and the change is only significant within a small area around the MR transducer at the trailing edge. With a typical current value (say 13 mA), the MR head temperature is about 25°C higher than the ambient temperature. When the slider flies over an asperity without contact, the MR temperature fluctuation follows that of the air bearing spacing, which is caused by the cooling effect of the air bearing.

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