Automating tuning of a closed loop controller
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United States of America Patent
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Mar 23, 2010
Grant Date -
Nov 22, 2007
app pub date -
May 21, 2007
filing date -
May 19, 2006
priority date (Note) -
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Abstract
The present invention is a novel device, system, and method for simultaneous selection of filters and loop proportional gain for a closed loop system. According to an exemplary embodiment of the present invention, a method provides an automated selection of the portion of the controller known as the speed loop compensator. The method may operate on a frequency response function that represents the dynamic response from an actuation force (e.g. motor torque) to the sensor used for feedback of speed control (e.g. motor encoder angle). The frequency response function may be represented as a series of complex numbers each with a corresponding frequency value. The tuning method determines the combination of filter parameters that allows the loop proportional loop gain (K.sub.p) to be maximized while meeting a specified set of criteria for stability margins. Methods for selecting integral gain and reference model are also presented.
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