Independent metering of pneumatic actuator for passive human power amplification

Venkat Durbha, Perry Y Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper, a method for passive human force amplification with independent metering of valves in a pneumatic actuator is reported. Unlike single valve metering, two independent valves are used to regulate the operating pressure of the actuator. The advantage of independent valves is that they can be controlled such that the actuator operates at minimum possible pressure, while providing a desired force profile. This results in reduction of the energy loss associated with discharge of high pressure air to the atmosphere thereby improving efficiency of operation. A pressure minimization scheme on the discharging side of the actuator is proposed to achieve minimum operating pressure. Passive human power amplification is achieved by commanding suitable inputs to the valve on the high pressure side. An experimental comparison with single valve metering shows that independent metering improves the operating time by nearly 100%, thus improving the efficiency of operation.

Original languageEnglish (US)
Title of host publicationProceedings of the 2010 American Control Conference, ACC 2010
Pages3317-3322
Number of pages6
StatePublished - Oct 15 2010
Event2010 American Control Conference, ACC 2010 - Baltimore, MD, United States
Duration: Jun 30 2010Jul 2 2010

Publication series

NameProceedings of the 2010 American Control Conference, ACC 2010

Other

Other2010 American Control Conference, ACC 2010
CountryUnited States
CityBaltimore, MD
Period6/30/107/2/10

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