Electricity: motive power systems – Positional servo systems – Plural servomotors
Reexamination Certificate
2005-05-31
2008-11-25
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
Plural servomotors
C318S041000, C318S077000, C318S085000
Reexamination Certificate
active
07456599
ABSTRACT:
An apparatus for use with an encoder feedback device includes a comparator, a counter, and a prediction unit. The encoder feedback device is coupled to rotate with a rotating load and operable to generate at least one feedback position signal indicative of movement of the rotating load. The comparator is operable to receive the feedback position signal and generate a first position signal including a plurality of edges based on the feedback position signal. The counter is operable to receive the first position signal and count the edges to periodically generate position values at a predetermined update interval. The prediction unit is operable to receive a position data request at a first time and predict a position of the rotating load at the first time as a function of at least a subset of the position values generated prior to the first time and a misalignment between the first time and the predetermined update interval to generate an aligned position signal.
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Piefer Richard W.
Quan Juntao
Rehm Thomas J.
Kuszewski Alexander R.
Quarles & Brady LLP
Ro Bentsu
Rockwell Automation Technologies Inc.
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