Patent ID: 7013187
Filing Date: 2006-03-14
Classification: G05B

Abstract:
1. A control method for use during a regulation stage and according to a set point of a physical dynamic system, the set point being subject to, whilst operating, the influence of several physical quantities represented by input parameters, and adopting a behavior defined by at least a first physical output parameter, obliged to take a value represented by the set point, the first output parameter being linked to at least a first of the input parameters by a first transfer function of the system, said control method comprising: implementing a characterization stage, prior to the regulation stage, in which at least a first inverse transfer function linking the first input parameter to the first output parameter is experimentally determined; and implementing a modeling stage, posterior to the characterization stage and prior to the regulation stage, in which the first inverse transfer function is translated through a fuzzy logic model in the form of a first set of ranges of the first output parameter, to each of which is attributed a specific value of the first input parameter; and implementing the regulation stage by determining a membership of the set point to one of the ranges of the first set, deducing from the membership and from the fuzzy logic model an estimated value of the first input parameter corresponding to the desired equality between the first output parameter and the set point, producing a measured value of the first input parameter, and regulating the first input parameter according to a difference between the estimated value of the first input parameter and the measured value of the first input parameter but not according to a difference between the set point and a measured value of the first output parameter.