Patent ID: 6466829
Filing Date: 2002-10-15
Classification: G05B

Abstract:
A method for obtaining a dependent variable output from a look-up table based on an input representing a current value of an independent variable, the table containing a series of data pairs of corresponding independent and dependent variable values ordered based on the independent variable value, and an index having a value associated with each of the data pairs, the method comprising the steps of:identifying a starting point index value, and comparing the input to an independent variable value of a data pair associated with said starting point index value; incrementally adjusting said starting point index value until the input is bracketed by stored independent variable values of first and second data pairs, one of which is associated with the adjusted index value; determining said dependent variable output by interpolation based on the input and said first and second data pairs; and saving said adjusted index value as the starting point index value for a subsequent look up from said table.