Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1993-01-29
1995-09-05
Ip, Paul
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318571, 318572, 364508, G06F 1546, G08B 2300
Patent
active
054481465
ABSTRACT:
An actively controlled, pneumatically-actuated constant force device (CFD) which may be fixed to a stationary mount or moved in three-dimensional space proximate a work surface. The device applies substantially constant force from an actuator, through a linkage, to a tool in contact with a work surface, e.g., a drilling, grinding or finishing tool, or a laminating roller. A processor provides closed-loop control of estimated tool force applied to the work surface, regardless of tool orientation. CFD compliance and response time may be altered by adjustment of gas pressures in a pneumatic cylinder. Active control of estimated tool force includes processing of information on actuator force, actuator orientation, tool and linkage weight, and actuator motion, as well as work surface irregularities. The device automatically compensates for changes in desired (reference) tool force by adjusting gas pressures entering a pneumatic force generator to bring estimated applied tool force into substantial agreement with the reference tool force.
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Board of Regents , The University of Texas System
Ip Paul
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