Method and apparatus for controlling a double-acting pneumatic actuator

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United States of America Patent

PATENT NO 11028864
APP PUB NO 20190101141A1
SERIAL NO

16144877

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A control loop for a double-acting pneumatic actuator is configured to generate two control signals, one for each of the two pneumatic chambers for the purpose of controlling the actuator position in view of operating constraints on the chamber pressures or the stiffness of the actuator. A numerical indicator of the stiffness may be computed in a variety of ways, for example, as the average of the two chamber pressures. In one embodiment a numerical indicator of stiffness is treated as an output of the system along with the position of the actuator. A multi-input multi-output control loop with position and pressure feedback may be used to simultaneously control the position and the stiffness of the actuator.

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Patent Owner(s)

  • FISHER CONTROLS INTERNATIONAL LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fontaine, Michael R Marshalltown, US 5 0
Junk, Kenneth W Marshalltown, US 44 677
Metschke, Christopher S Ames, US 4 22
Smid, David L Marshalltown, US 5 10

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