Cylinder tube strain measurement feedback for piston position co

Details Cylinder tube strain measurement feedback for piston position co Cylinder tube strain measurement feedback for piston position co

1985-09-16

1987-10-20

Garrett, Robert E.

Motors: expansible chamber type

Position maintaining type

91 1, 91420, 91433, 73 9, F15B 1316

Patent

active

047006102

ABSTRACT:
A fluid cylinder control method for monitoring the position or controlling the movements of a piston which is slidably guided in a cylinder tube and is acted upon on at least one side by a pressure medium, in particular, maintaining the piston in a predetermined position against the action of eventual disturbance forces. This is attained in that the force which is transmitted between the piston and the cylinder by way of the parts which are slidingly guided on each other, and in particular the friction force acting by way of the seal gaskets of the piston and/or of the rod, is measured and the loading of the piston by a pressure medium is varied in the sense of reducing the measured force.

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R. Jackman et al, "The Position-Controlled Hydraulic Mill," Journal of the Iron and Steel Inst., vol. 210, Apr. 1972, pp. 235-245.
Milligan, R. V., "On the Use of Foil Strain Gayes to Measure Internal Strains of Thick-Walled Cylinders." ISA Transactions, 15:1, pp. 95-99 (1976).
Tolliver, B. R., "Strain-Gage Pressure Transducers, New Look for an Old Standby." Machine Design, 49: pp. 123-127, Nov. 10, 1977.

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