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Design and energetic characterization of a proportional-injector monopropellant-powered actuator

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2 Author(s)
Fite, K.B. ; Dept. of Mech. Eng., Vanderbilt Univ., Nashville, TN, USA ; Goldfarb, M.

This paper describes the design and energetic characterization of an actuator designed to provide enhanced system energy and power density for self-powered robots. The proposed actuator is similar to a typical compressible gas fluid-powered actuator, but pressurizes the respective cylinder chambers via a pair of proportional injector valves, which control the flow of a liquid monopropellant through a pair of catalyst packs and into the respective sides of the double-acting cylinder. This paper describes the design of the proportional injection valves and describes the structure of a force controller for the actuator. Finally, an energetic characterization of the actuator shows improvement relative to prior configurations and marked improvement relative to state-of-the-art batteries and motors.

Published in:

Mechatronics, IEEE/ASME Transactions on  (Volume:11 ,  Issue: 2 )

Date of Publication:

April 2006

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