Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole

• Autorzy: Grivon D. , Civet Y. , Pataky Z. , Perriard Y.

Identyfikatory

DOI

10.1515/aee-2015-0040

• Języki publikacji: EN

Abstrakty

EN

The proposed paper discusses the design and characterization of a soft miniature Magneto-Rheological (MR) shock absorber. In particular, the final application considered for the insertion of the designed devices is a controllable variable stiffness sole for patients with foot neuropathy. Such application imposes particularly challenging constraints in terms of miniaturization (cross-sectional area ≤ 1.5 cm2, height ≤ 25 mm) and high sustainable loads (normal loads up to 60 N and shear stresses at the foot/device interface up to 80 kPa) while ensuring moderate to low level of power consumption. Initial design considerations are done to introduce and justify the chosen novel configuration of soft shock absorber embedding a MR valve as the core control element. Successively, the dimensioning of two different MR valves typologies is discussed. In particular, for each configuration two design scenarios are evaluated and consequently two sets of valves satisfying different specifications are manufactured. The obtained prototypes result in miniature modules (external diam. ≤ 15 mm, overall height ≤ 30 mm) with low power consumption (from a minimum of 63 mW to a max. of 110 mW) and able to sustain a load up to 65 N. Finally, experimental sessions are performed to test the behaviour of the realized shock absorbers and results are presented.

Słowa kluczowe

EN

magneto-rheological fluid; miniaturization; soft shock absorber; design and characterization

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2015
• Tom: Vol. 64, nr 4
• Strony: 547--558
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr., wz.

Twórcy

autor

Grivon D.

• École Polytechnique Fédérale de Lausanne Institut de Microtechnique (IMT), Laboratoire d’Actionneurs Intégrés (LAI) Rue de la Maladière, 71 B, 2002 Neuchâtel, Switzerland

autor

Civet Y.

• École Polytechnique Fédérale de Lausanne Institut de Microtechnique (IMT), Laboratoire d’Actionneurs Intégrés (LAI) Rue de la Maladière, 71 B, 2002 Neuchâtel, Switzerland

autor

Pataky Z.

• Service of Therapeutic Education for Chronic Diseases, WHO Collaborating Center Geneva University Hospital and University of Geneva Rue de Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland

autor

Perriard Y.

• École Polytechnique Fédérale de Lausanne Institut de Microtechnique (IMT), Laboratoire d’Actionneurs Intégrés (LAI) Rue de la Maladière, 71 B, 2002 Neuchâtel, Switzerland

Bibliografia

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