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AssigneeFisher Controls International LLC
InventorsChristopher S. Metschke, Michael R. Fontaine, Kenneth W. Junk, David L. Smid
Estimating the term…
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.
A method of controlling a double-acting pneumatic actuator, the actuator comprising an actuated piston and two pneumatic chambers, wherein pressure in one chamber exerts a force on a piston in one direction, while pressure in the other chamber exerts a force on the piston in the opposite direction, and the method of controlling the actuator comprising:
A system for controlling a double-acting pneumatic actuator, the system comprising:
A method of controlling a double-acting pneumatic actuator, the actuator comprising an actuated piston and two pneumatic chambers, wherein pressure in one of the two pneumatic chambers exerts a force on the piston in one direction, while pressure in the other of the two pneumatic chambers exerts a force on the piston in the opposite direction, comprising:
Dependencies are inferred from the claim text.