Appeal No. 2007-0067
Application No. 10/202,097
Invention
The invention is directed to an apparatus for positioning an object,
e.g., a valve. The apparatus learns a reference position, which is associated
with a control point, e.g., a fixed stopper which limits motion of valve. The
learning is performed by moving the object to a temporary reference position
using a high gain control and then past the temporary reference position to
the control point using a second lower gain. See pages 1 and 2 of
Appellant’s specification. Claim 1 is representative of the invention and
reproduced below:
1. A positioning control apparatus comprising:
position detecting means for detecting the position of a
positioning object;
target position generation means for generating a target position
signal based on an output from said position detecting means; and
driving means for driving said positioning object based on an
output from said target position generation means;
wherein said target position generation means includes control
means for setting a temporary target position of said positioning
object, and learning a reference position of said positioning object
with a control gain given to said driving means, said control gain
comprising a first control gain, which is valid until the time when said
positioning object reaches the set temporary target position, and a
second control gain, which is smaller than said first control gain and
which is valid after the time when said positioning object has reached
the temporary target position until the reference position learning is
completed.
2
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