NDLI: Parameter identification and sensitivity analysis of an improved LuGre friction model for magnetorheological elastomer base isolator

Content Provider	Springer Nature Link
Author	Yu, Yang Li, Yancheng Li, Jianchun
Copyright Year	2015
Abstract	The recently-developed magnetorheological elastomer (MRE) base isolator can provide an instant change in the shear modulus and damping property under applied magnetic field, which makes it as an ideal device for the semi-active control in buildings and bridges. Previous studies show that this new device is featured with its nonlinear and hysteretic responses, and it is necessary to sufficiently understand its behaviour when adopting this device in control system. Although there are several models presented to predict the hysteresis of MRE base isolator, they are always suffered from some application limitations, e.g. high computation demand or complex model. To better interpret this complicated feature of the device, this work presents an improved LuGre friction model, which has been successfully used in modelling other magnetorheological device i.e. MR damper. In addition, an improved fruit fly optimization algorithm (IFFOA) is also proposed to identify the model parameters. In the improved algorithm, a transfer factor based on a self-adaptive step is added together with a three-dimensional searching space. This improvement can enhance the convergence rate of the algorithm and avoid the local optimum. Furthermore, to reduce the complexity of the model, the local and global parameter sensitivity analyses are conducted for model simplification. Eventually, the experimental measurements of device displacement, velocity and shear force are used to evaluate the performance of the proposed model and IFFOA.
Starting Page	2691
Ending Page	2707
Page Count	17
File Format	PDF
ISSN	00256455
Journal	Meccanica
Volume Number	50
Issue Number	11
e-ISSN	15729648
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-05-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetorheological elastomer base isolator LuGre friction model Parameter identification Sensitivity analysis Fruit fly optimization algorithm Mechanics Civil Engineering Automotive Engineering Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Mechanical Engineering

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