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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Durfee, W. Jicheng Xia Hsiao-Wecksler, E. |
| Copyright Year | 2011 |
| Description | Author affiliation: University of Minnesota, Minneapolis, USA (Durfee, W.; Jicheng Xia) || University of Illinois, Urbana-Champaign, USA (Hsiao-Wecksler, E.) |
| Abstract | Untethered, powered orthotics require an actuation system with power supply and control, transmission line and actuator. Fluid power has unmatched force-to-weight and power-to-weight compared to electromechanical systems, but it is unclear if those same advantages hold for small systems in the 10 to 100 W range. A systems analysis approach suggests that a fluid power system will be lighter than an electromechanical system with the same output power and efficiency if the fluid power is run at pressures over about 200 psi. A theoretical analysis of small bore cylinders suggests that eliminating the piston seal will result in a higher efficiency actuator if the clearance gap is small. A demonstration, battery powered electrohydraulic actuator assembled from off-the-shelf components had the force and power suited to a powered ankle orthosis, but is too large and too heavy, suggesting the need to develop custom components. |
| Starting Page | 1 |
| Ending Page | 6 |
| File Size | 646948 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424498635 |
| ISSN | 19457898 |
| e-ISBN | 9781424498628 |
| e-ISBN | 9781424498611 |
| DOI | 10.1109/ICORR.2011.5975473 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-06-29 |
| Publisher Place | Switzerland |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Pistons powered orthotics Actuators Fluids Power supplies Pumps Seals fluid power Orthotics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Rehabilitation Control and Systems Engineering Electrical and Electronic Engineering |
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