Characteristics of braking devices using ERF

Hitoshi Nishida; Kunio Shimada

doi:10.1117/12.468646

13 November 2002 Characteristics of braking devices using ERF

Hitoshi Nishida, Kunio Shimada

Proceedings Volume 4934, Smart Materials II; (2002) https://doi.org/10.1117/12.468646
Event: SPIE's International Symposium on Smart Materials, Nano-, and Micro- Smart Systems, 2002, Melbourne, Australia

Abstract

We clarified the characteristics of rotating-disk and rotating-concentric-cylinder braking device types using ERF (electro-rheological fluid) with smectite particles. Concerning the steady characteristics of the both braking devices, the current density of the rotating-disk type is smaller than that of the concentric cylinder type. In addition, the input electric power per increment of torque has the same ratio as the enhancement of the shear rate. In contrast, regarding the transition characteristics, the rise time of the torque for the rotating-disk type is shorter than that for the concentric-cylinder type, though the current’s rise time is almost the same in both braking devices. It can be considered that the current density of the rotating-disk type is small and the rise time of the torque of the one type is small due to the influence of the secondary flow. The microscopic tendency of the electric charge can be guessed from the transition characteristic of the electric current.

Citation Download Citation

Hitoshi Nishida and Kunio Shimada "Characteristics of braking devices using ERF", Proc. SPIE 4934, Smart Materials II, (13 November 2002); https://doi.org/10.1117/12.468646

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